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In page Nancy Koehn:

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Koehn is a business historian at Harvard Faculty of Arts and Sciences and has been a business historian at Harvard Business School, since 2011 (some online sources say 1991).[citation needed] She began as a Visiting Scholar (2011–2013), then was offered the James E. Robison Professor of Business Administration, which she has held since 2013. Her predecessor in that endowed Chair was James Cash Jr.