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His two-volume study, written with Robert W. Fogel, used data to challenge commonly held ideas about American slavery, including that it was unprofitable and inefficient.

New yorkUnited statesColumbia universityNew york universityUniversity of rochesterStanley engermanKenneth clarkAlfred conradRobertw fogelJohn joseph wallisPeter passellJudith rader engermanToni morrisonJohn meyerKennethm stamppEdith kaplan engerman