Author Archives: tompepinsky

What is Peer Review For? Why Referees are not the Disciplinary Police

The peculiar thing about peer review is that it is central to our professional lives as political scientists, yet we tend to talk about refereeing only in the most general and anonymous terms. I have never shown an anonymous referee … Continue reading

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Why Can’t We Just Make Up Instrumental Variables?

Valid instrumental variables are hard to find. The key identification assumption that an instrumental variable be correlated with an endogenous variable , but not causally related to , is difficult to justify in most empirical applications. Even worse, the latter … Continue reading

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