Current Ph.D. student Marina-Selini Katsaiti (IDEAS) and recent graduates Philip Shaw (IDEAS) and Marius Jurgilas (IDEAS), all advised by Christian Zimmermann (IDEAS), will publish a paper entitled “Corruption and Growth Under Weak Identification” in the journal Economic Inquiry. This paper reviews the recent literature in econometrics that focuses on identification and statistical inference when a researcher has weakly correlated instruments variables. In light of this recent theoretical work in econometrics, it analyses a highly influential article in economics and finds that the original results of this article are misleading. It then updates the original analysis and shows that there is no relationship between corruption and economic growth or investment, which is contrary to the results of the original article. The paper also suggests that the problem of weak instruments in the corruption literature may not be isolated to a single article but instead the entire empirical literature that tries to find a causal link between corruption and economic growth or investment. The paper contributes also to the literature by demonstrating how researchers can “deal” with the problem of weak identification.

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