Jeffrey Sonnenfeld

Jeffrey Sonnenfeld is the Lester Crown Professor in Management Practice and Senior Associate Dean at Yale School of Management.

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  • Mylan Buys Abbott Laboratories Generic Drug Business For $5.3 BillionLeadership

    Mylan, Valeant and Theranos: What the Heck, Biotech?

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  • Ellen KullmanLeadership

    Another suicidal board? How DuPont’s directors failed Ellen Kullman

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  • Donald Trump (center) with Jeffrey Sonnenfeld (left) and his Yale colleague Jacob Hacker (right) in Trump's officeLeadership

    Exclusive: Donald Trump tells Yale’s Jeff Sonnenfeld why he should be President

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  • Mylan CEO Robert Coury, left, in 2009 and Bank of America CEO Brian Moynihan in 2014.Leadership

    Blurred governance: Mylan’s illusions vs. BofA’s realities

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  • Republican Presidential Candidates Address 2015 Family Leadership SummitLeadership

    Why the ‘Dump Trump’ strategy is doomed

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  • Carly Fiorina, 2016 Republican Presidentail candidateLeadership

    Carly Fiorina as a boss: The disappointing truth

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  • Cisco CEO John Chambers at Fortune Brainstorm Tech 2014Leadership

    CEO exit schedules: A season to stay, a season to go

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  • Leadership

    Brian Williams unanchored: A path to career recovery

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  • Leadership

    McDonald’s deserves a break today

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  • power ego tripLeadership

    The hero complex: A common, curable leadership malady

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