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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."}],"balance_after":13118.7091,"source":{"system":"sec-edgar","filing":"0001415889-25-007893","document":"form4-03122025_100310.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925007893/form4-03122025_100310.xml","form_type":"4"}},{"id":1210500,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2025-03-12T22:03:14.000Z","date":"2025-03-10","kind":"tax_withholding","planned":false,"acquired":false,"shares":129,"price":174.28,"value":22482.12,"ownership":{"direct":true},"balance_after":12463,"source":{"system":"sec-edgar","filing":"0001415889-25-007893","document":"form4-03122025_100310.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925007893/form4-03122025_100310.xml","form_type":"4"}},{"id":1210499,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2025-03-12T22:03:14.000Z","date":"2025-03-10","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":15.7556,"price":174.28,"value":2745.885968,"ownership":{"direct":true},"balance_after":12592,"source":{"system":"sec-edgar","filing":"0001415889-25-007893","document":"form4-03122025_100310.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925007893/form4-03122025_100310.xml","form_type":"4"}},{"id":1210498,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2025-03-12T22:03:14.000Z","date":"2025-03-10","kind":"exercise","planned":false,"acquired":true,"shares":454.7556,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."}],"balance_after":12607.7556,"source":{"system":"sec-edgar","filing":"0001415889-25-007893","document":"form4-03122025_100310.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925007893/form4-03122025_100310.xml","form_type":"4"}},{"id":1215775,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2025-03-10T22:07:43.000Z","date":"2025-03-06","kind":"sale","planned":true,"acquired":false,"shares":37,"price":187.5945,"value":6940.9965,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F4","text":"The price reported in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $187.4025 to $188.16, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":12153,"source":{"system":"sec-edgar","filing":"0001415889-25-007555","document":"form4-03102025_100339.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925007555/form4-03102025_100339.xml","form_type":"4"}},{"id":1215774,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2025-03-10T22:07:43.000Z","date":"2025-03-06","kind":"sale","planned":true,"acquired":false,"shares":486,"price":187.157,"value":90958.302,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F3","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $187.00 to $187.33, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":12190,"source":{"system":"sec-edgar","filing":"0001415889-25-007555","document":"form4-03102025_100339.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925007555/form4-03102025_100339.xml","form_type":"4"}},{"id":1215773,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2025-03-10T22:07:43.000Z","date":"2025-03-06","kind":"sale","planned":true,"acquired":false,"shares":477,"price":184.2824,"value":87902.7048,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price in Column 4 is a weighted average price. The shares were sold in multiple transactions at prices ranging from $184.05 to $184.50, inclusive. The reporting person undertakes to provide the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"These transactions were effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on August 8, 2024."}],"balance_after":12676,"source":{"system":"sec-edgar","filing":"0001415889-25-007555","document":"form4-03102025_100339.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588925007555/form4-03102025_100339.xml","form_type":"4"}},{"id":1223829,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2025-03-05T23:21:06.000Z","date":"2025-03-03","kind":"exercise","planned":false,"acquired":true,"shares":1265.0666,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F2","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. 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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 23.8722 Dividend Units, vest on December 15, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 23.8722 Dividend Units, vest on December 15, 2024."}],"balance_after":495.8722,"derivative":{"underlying":"Common Stock","underlying_shares":1.2548},"source":{"system":"sec-edgar","filing":"0001415889-24-023536","document":"form4-09172024_090929.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924023536/form4-09172024_090929.xml","form_type":"4"}},{"id":1436254,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2024-08-12T21:20:07.000Z","date":"2024-08-08","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":155.21,"value":155210.0,"ownership":{"direct":true},"footnotes":[{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F1","text":"The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 28, 2023."}],"balance_after":11624,"source":{"system":"sec-edgar","filing":"0001415889-24-021102","document":"form4-08122024_090804.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924021102/form4-08122024_090804.xml","form_type":"4"}},{"id":1476014,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-06-18T22:06:08.000Z","date":"2024-06-14","kind":"grant","planned":false,"acquired":true,"shares":3.9272,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The RSUs, which include an aggregate of 3.9272 Dividend Units, vest in four equal annual installments beginning on April 29, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F9","text":"The RSUs, which include an aggregate of 3.9272 Dividend Units, vest in four equal annual installments beginning on April 29, 2025."}],"balance_after":1622.9272,"derivative":{"underlying":"Common Stock","underlying_shares":3.9272},"source":{"system":"sec-edgar","filing":"0001415889-24-017487","document":"form4-06182024_100604.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":9,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924017487/form4-06182024_100604.xml","form_type":"4"}},{"id":1476013,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-06-18T22:06:08.000Z","date":"2024-06-14","kind":"grant","planned":false,"acquired":true,"shares":2.603,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The RSUs, which include an aggregate of 17.6776 Dividend Units, vest in three equal annual installments beginning on April 11, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The RSUs, which include an aggregate of 17.6776 Dividend Units, vest in three equal annual installments beginning on April 11, 2025."}],"balance_after":1075.6776,"derivative":{"underlying":"Common Stock","underlying_shares":2.603},"source":{"system":"sec-edgar","filing":"0001415889-24-017487","document":"form4-06182024_100604.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":8,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924017487/form4-06182024_100604.xml","form_type":"4"}},{"id":1476012,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-06-18T22:06:08.000Z","date":"2024-06-14","kind":"grant","planned":false,"acquired":true,"shares":1.6547,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The RSUs, which include an aggregate of 28.8204 Dividend Units, vest on March 22, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The RSUs, which include an aggregate of 28.8204 Dividend Units, vest on March 22, 2025."}],"balance_after":683.8204,"derivative":{"underlying":"Common Stock","underlying_shares":1.6547},"source":{"system":"sec-edgar","filing":"0001415889-24-017487","document":"form4-06182024_100604.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":7,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924017487/form4-06182024_100604.xml","form_type":"4"}},{"id":1476011,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-06-18T22:06:08.000Z","date":"2024-06-14","kind":"grant","planned":false,"acquired":true,"shares":0.9195,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F6","text":"The RSUs, which include an aggregate of 16.0133 Dividend Units, vest on March 22, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F6","text":"The RSUs, which include an aggregate of 16.0133 Dividend Units, vest on March 22, 2025."}],"balance_after":380.0133,"derivative":{"underlying":"Common Stock","underlying_shares":0.9195},"source":{"system":"sec-edgar","filing":"0001415889-24-017487","document":"form4-06182024_100604.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":6,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924017487/form4-06182024_100604.xml","form_type":"4"}},{"id":1476010,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-06-18T22:06:08.000Z","date":"2024-06-14","kind":"grant","planned":false,"acquired":true,"shares":3.1574,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F5","text":"The RSU's, which include an aggregate of 38.8000 Dividend Units, vest in two equal annua installments beginning on March 10, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F5","text":"The RSU's, which include an aggregate of 38.8000 Dividend Units, vest in two equal annua installments beginning on March 10, 2025."}],"balance_after":1304.8,"derivative":{"underlying":"Common Stock","underlying_shares":3.1574},"source":{"system":"sec-edgar","filing":"0001415889-24-017487","document":"form4-06182024_100604.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":5,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924017487/form4-06182024_100604.xml","form_type":"4"}},{"id":1476009,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-06-18T22:06:08.000Z","date":"2024-06-14","kind":"grant","planned":false,"acquired":true,"shares":2.1898,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F4","text":"The RSUs, which include an aggregate of 26.9212 Dividend Units, vest in two equal annual installments beginning on March 10, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F4","text":"The RSUs, which include an aggregate of 26.9212 Dividend Units, vest in two equal annual installments beginning on March 10, 2025."}],"balance_after":904.9212,"derivative":{"underlying":"Common Stock","underlying_shares":2.1898},"source":{"system":"sec-edgar","filing":"0001415889-24-017487","document":"form4-06182024_100604.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924017487/form4-06182024_100604.xml","form_type":"4"}},{"id":1476008,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-06-18T22:06:08.000Z","date":"2024-06-14","kind":"grant","planned":false,"acquired":true,"shares":2.1553,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F3","text":"The RSUs, which include an aggregate of 40.7193 Dividend Units, vest on December 15, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F3","text":"The RSUs, which include an aggregate of 40.7193 Dividend Units, vest on December 15, 2024."}],"balance_after":890.7193,"derivative":{"underlying":"Common Stock","underlying_shares":2.1553},"source":{"system":"sec-edgar","filing":"0001415889-24-017487","document":"form4-06182024_100604.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924017487/form4-06182024_100604.xml","form_type":"4"}},{"id":1476007,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-06-18T22:06:08.000Z","date":"2024-06-14","kind":"grant","planned":false,"acquired":true,"shares":1.1969,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 22.6174 Dividend Units, vest on December 15, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 22.6174 Dividend Units, vest on December 15, 2024."}],"balance_after":494.6174,"derivative":{"underlying":"Common Stock","underlying_shares":1.1969},"source":{"system":"sec-edgar","filing":"0001415889-24-017487","document":"form4-06182024_100604.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924017487/form4-06182024_100604.xml","form_type":"4"}},{"id":1504200,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2024-05-23T21:17:16.000Z","date":"2024-05-21","kind":"sale","planned":true,"acquired":false,"shares":1000,"price":174.0097,"value":174009.7,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"The price reported in Column 4 is a weighted average price.  The shares were sold in multiple transactions at prices ranging from $174.00 to $174.08, inclusive.  The reporting person undertakes to provide to the Issuer, any security holder of the Issuer, or the staff of the Securities and Exchange Commission, upon request, full information regarding the number of shares sold at each separate price within such range."},{"field":"ownership.direct","element":"directOrIndirectOwnership","label":"F2","text":"The transaction was effected pursuant to a Rule 10b5-1 trading plan adopted by the reporting person on November 28, 2023."}],"balance_after":12624,"source":{"system":"sec-edgar","filing":"0001415889-24-014321","document":"form4-05232024_090504.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924014321/form4-05232024_090504.xml","form_type":"4"}},{"id":1532247,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-05-01T22:16:48.000Z","date":"2024-04-29","kind":"grant","planned":false,"acquired":true,"shares":1619,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs vest in four equal annual installments beginning on April 29, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs vest in four equal annual installments beginning on April 29, 2025."}],"balance_after":1619,"derivative":{"underlying":"Common Stock","underlying_shares":1619},"source":{"system":"sec-edgar","filing":"0001415889-24-011900","document":"form4-05012024_100540.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924011900/form4-05012024_100540.xml","form_type":"4"}},{"id":1542139,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-04-15T23:07:01.000Z","date":"2024-04-11","kind":"exercise","planned":false,"acquired":false,"shares":357.0154,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The remaining RSUs, which include an aggregate of 15.0746 Dividend Units, vest in three equal annual installments beginning on April 11, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The remaining RSUs, which include an aggregate of 15.0746 Dividend Units, vest in three equal annual installments beginning on April 11, 2025."}],"balance_after":1073.0746,"derivative":{"underlying":"Common Stock","underlying_shares":357.0154},"source":{"system":"sec-edgar","filing":"0001415889-24-010832","document":"form4-04152024_110454.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924010832/form4-04152024_110454.xml","form_type":"4"}},{"id":1542138,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2024-04-15T23:07:01.000Z","date":"2024-04-11","kind":"tax_withholding","planned":false,"acquired":false,"shares":171,"price":145.12,"value":24815.52,"ownership":{"direct":true},"balance_after":13624,"source":{"system":"sec-edgar","filing":"0001415889-24-010832","document":"form4-04152024_110454.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924010832/form4-04152024_110454.xml","form_type":"4"}},{"id":1542137,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2024-04-15T23:07:01.000Z","date":"2024-04-11","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":5.0154,"price":145.12,"value":727.834848,"ownership":{"direct":true},"balance_after":13795,"source":{"system":"sec-edgar","filing":"0001415889-24-010832","document":"form4-04152024_110454.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924010832/form4-04152024_110454.xml","form_type":"4"}},{"id":1542136,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2024-04-15T23:07:01.000Z","date":"2024-04-11","kind":"exercise","planned":false,"acquired":true,"shares":357.0154,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."}],"balance_after":13800.0154,"source":{"system":"sec-edgar","filing":"0001415889-24-010832","document":"form4-04152024_110454.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924010832/form4-04152024_110454.xml","form_type":"4"}},{"id":1547112,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-04-05T23:34:51.000Z","date":"2024-04-03","kind":"exercise","planned":false,"acquired":false,"shares":3334.5634,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F2","text":"The RSUs, which include an aggregate of 197.5634 Dividend Units, vested on April 3, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F2","text":"The RSUs, which include an aggregate of 197.5634 Dividend Units, vested on April 3, 2024."}],"balance_after":0,"derivative":{"underlying":"Common Stock","underlying_shares":3334.5634},"source":{"system":"sec-edgar","filing":"0001415889-24-010454","document":"form4-04052024_110444.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":4,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924010454/form4-04052024_110444.xml","form_type":"4"}},{"id":1547111,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2024-04-05T23:34:51.000Z","date":"2024-04-03","kind":"tax_withholding","planned":false,"acquired":false,"shares":1219,"price":150.53,"value":183496.07,"ownership":{"direct":true},"balance_after":13443,"source":{"system":"sec-edgar","filing":"0001415889-24-010454","document":"form4-04052024_110444.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":3,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924010454/form4-04052024_110444.xml","form_type":"4"}},{"id":1547110,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2024-04-05T23:34:51.000Z","date":"2024-04-03","kind":"disposition_to_issuer","planned":false,"acquired":false,"shares":197.5634,"price":150.53,"value":29739.218602,"ownership":{"direct":true},"balance_after":14662,"source":{"system":"sec-edgar","filing":"0001415889-24-010454","document":"form4-04052024_110444.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":2,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924010454/form4-04052024_110444.xml","form_type":"4"}},{"id":1547109,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Common Stock","published_at":"2024-04-05T23:34:51.000Z","date":"2024-04-03","kind":"exercise","planned":false,"acquired":true,"shares":3334.5634,"ownership":{"direct":true},"footnotes":[{"field":"price","element":"transactionPricePerShare","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."}],"balance_after":14859.5634,"source":{"system":"sec-edgar","filing":"0001415889-24-010454","document":"form4-04052024_110444.xml","document_sequence":1,"table":"nonDerivative","row_type":"transaction","position":1,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924010454/form4-04052024_110444.xml","form_type":"4"}},{"id":1560977,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-03-26T22:10:03.000Z","date":"2024-03-22","kind":"grant","planned":false,"acquired":true,"shares":4.1894,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"shares","element":"transactionShares","label":"F2","text":"Amount represents Dividend Units acquired on the RSUs at $142.95 on March 22, 2024.  These Dividend Units are payable only in cash."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F10","text":"The RSUs, which include an aggregate of 20.0900 Dividend Units, vest in four equal annual installments beginning on April 11, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F10","text":"The RSUs, which include an aggregate of 20.0900 Dividend Units, vest in four equal annual installments beginning on April 11, 2024."}],"balance_after":1430.09,"derivative":{"underlying":"Common Stock","underlying_shares":4.1894},"source":{"system":"sec-edgar","filing":"0001415889-24-009147","document":"form4-03262024_100354.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":16,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924009147/form4-03262024_100354.xml","form_type":"4"}},{"id":1560976,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-03-26T22:10:03.000Z","date":"2024-03-22","kind":"grant","planned":false,"acquired":true,"shares":9.7685,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"shares","element":"transactionShares","label":"F2","text":"Amount represents Dividend Units acquired on the RSUs at $142.95 on March 22, 2024.  These Dividend Units are payable only in cash."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F9","text":"The RSUs, which include an aggregate of 197.5634 Dividend Units, vest on April 3, 2024."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F9","text":"The RSUs, which include an aggregate of 197.5634 Dividend Units, vest on April 3, 2024."}],"balance_after":3334.5634,"derivative":{"underlying":"Common Stock","underlying_shares":9.7685},"source":{"system":"sec-edgar","filing":"0001415889-24-009147","document":"form4-03262024_100354.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":15,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924009147/form4-03262024_100354.xml","form_type":"4"}},{"id":1560975,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-03-26T22:10:03.000Z","date":"2024-03-22","kind":"grant","planned":false,"acquired":true,"shares":3.8132,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"shares","element":"transactionShares","label":"F2","text":"Amount represents Dividend Units acquired on the RSUs at $142.95 on March 22, 2024.  These Dividend Units are payable only in cash."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F8","text":"The RSU's, which include an aggregate of 35.6426 Dividend Units, vest in two equal annua installments beginning on March 10, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F8","text":"The RSU's, which include an aggregate of 35.6426 Dividend Units, vest in two equal annua installments beginning on March 10, 2025."}],"balance_after":1301.6426,"derivative":{"underlying":"Common Stock","underlying_shares":3.8132},"source":{"system":"sec-edgar","filing":"0001415889-24-009147","document":"form4-03262024_100354.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":14,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924009147/form4-03262024_100354.xml","form_type":"4"}},{"id":1560974,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-03-26T22:10:03.000Z","date":"2024-03-22","kind":"grant","planned":false,"acquired":true,"shares":2.6446,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"shares","element":"transactionShares","label":"F2","text":"Amount represents Dividend Units acquired on the RSUs at $142.95 on March 22, 2024.  These Dividend Units are payable only in cash."},{"field":"derivative.exercise_date","element":"exerciseDate","label":"F7","text":"The RSUs, which include an aggregate of 24.7314 Dividend Units, vest in two equal annual installments beginning on March 10, 2025."},{"field":"derivative.expiration_date","element":"expirationDate","label":"F7","text":"The RSUs, which include an aggregate of 24.7314 Dividend Units, vest in two equal annual installments beginning on March 10, 2025."}],"balance_after":902.7314,"derivative":{"underlying":"Common Stock","underlying_shares":2.6446},"source":{"system":"sec-edgar","filing":"0001415889-24-009147","document":"form4-03262024_100354.xml","document_sequence":1,"table":"derivative","row_type":"transaction","position":13,"url":"https://www.sec.gov/Archives/edgar/data/1053706/000141588924009147/form4-03262024_100354.xml","form_type":"4"}},{"id":1560973,"issuer":{"id":923,"kind":"organization","name":"CRA INTERNATIONAL, INC.","symbol":"CRAI"},"owners":[{"id":80799,"kind":"person","name":"Mahoney Daniel K.","position":1,"cik":"0001620413","reported_name":"Mahoney Daniel K.","relationship":{"director":false,"officer":true,"ten_percent_owner":false,"other":false,"officer_title":"EVP, CFO AND TREASURER"}}],"security":"Restricted Stock Units","published_at":"2024-03-26T22:10:03.000Z","date":"2024-03-22","kind":"grant","planned":false,"acquired":true,"shares":2.603,"price":0,"value":0.0,"ownership":{"direct":true},"footnotes":[{"field":"derivative.exercise_price","element":"conversionOrExercisePrice","label":"F1","text":"Each restricted stock unit ("RSU") represents a contingent right to receive one share of the Issuer's common stock; vested RSUs are payable in the form of cash, shares of the Issuer's common stock or a combination thereof, except as otherwise indicated below. To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"shares","element":"transactionShares","label":"F2","text":"Amount represents Dividend Units acquired on the RSUs at $142.95 on March 22, 2024.  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To the extent vested RSUs are paid in shares of the Issuer's common stock, such shares will be delivered to the reporting person as soon as possible after vesting, but in no event later than two and one-half months after the end of the year in which vesting occurs, subject to the collection of withholding taxes. Dividend equivalent rights accrue with respect to unvested RSUs in the form of additional RSUs ("Dividend Units") when and as dividends are paid on the Issuer's common stock, and Dividend Units vest on the same dates and in the same relative proportions as the RSUs on which they accrue."},{"field":"shares","element":"transactionShares","label":"F2","text":"Amount represents Dividend Units acquired on the RSUs at $142.95 on March 22, 2024.  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