STICERD Econometrics Seminar Series
Under the null of valid specification, pre-tests cannot make post-test inference liberal
Clement De Chaisemartin (Sciences Po)
Thursday 26 February 2026 14:00 - 15:30
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About this event
Consider a parameter of interest, which can be consistently estimated under some conditions. Suppose also that we can at least partly test these conditions with specification tests. We consider the common practice of conducting inference on the parameter of interest conditional on not rejecting these tests. We show that if the tested conditions hold, conditional inference is valid, though possibly conservative. This holds generally, without imposing any assumption on the asymptotic dependence between the estimator of the parameter of interest and the specification test.