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b'The controversial Harvard economist, recently back from a suspension, \\u201cbroke a lot of glass early in my career,\\u201d he says. His research on school incentives and police brutality won him acclaim \\u2014 but also enemies. Now he\\u2019s taking a hard look at corporate diversity programs. The common thread in his work? \\u201cI refuse to not tell the truth.\\u201d'