Inference for Rank-Rank Regressions

Denis Chetverikov, Daniel Wilhelm

arXiv 24 Oct 2023 · Econometrics · 5 citations (OpenAlex)

arXiv:2310.15512 · PDF · DOI · OpenAlex · Extracted main text

Abstract

The slope coefficient in a rank-rank regression is a popular measure of intergenerational mobility. In this article, we first show that commonly used inference methods for this slope parameter are invalid. Second, when the underlying distribution is not continuous, the OLS estimator and its asymptotic distribution may be highly sensitive to how ties in the ranks are handled. Motivated by these findings we develop a new asymptotic theory for the OLS estimator in a general class of rank-rank regression specifications without imposing any assumptions about the continuity of the underlying distribution. We then extend the asymptotic theory to other regressions involving ranks that have been used in empirical work. Finally, we apply our new inference methods to two empirical studies on intergenerational mobility, highlighting the practical implications of our theoretical findings.

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