The Economist as Affable Provocateur

MIT's Sendhil Mullainathan uses interdisciplinary methods to study issues like cigarette taxes and racial bias in hiring

Sendhil Mullainathan's career is not what he once imagined for himself. When he started graduate school in economics 10 years ago, he says, "I expected that I'd be writing theory papers with lots of math." But today, as a professor of economics at the Massachusetts Institute of Technology, Mr. Mullainathan finds himself obsessed with questions that are immediate and

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