IdEP Seminar "Understanding Migration Responses to Local Shocks ", Rafael Dix-Carneiro

Istituto di economia politica

Data: 15 Maggio 2023 / 12:30 - 13:30

Room 354 (main building), Università della Svizzera italiana, Campus Ovest Lugano

We examine how to interpret estimates from a commonly used migration regression relating changes in local population to exogenous local labor demand shocks. Using a simple model of local labor markets with mobility costs, we find that common conclusions drawn from migration regression estimates are likely to be substantially misleading. Intuitively, the conventional migration regression is misspecified due to the bilateral nature of location choices. Workers choose where to live based not only on the shock to their current location, but also on the shocks to potential alternative locations, which are omitted from the regression. Analytical results and simulations based on Brazilian data show that conventional migration regression estimates are inaccurate for the local population effects of either shocks to individual locations or all observed shocks taken together. These problems are particularly acute when workers face industry switching costs in addition to geographic mobility costs. A simple alternative approach leveraging the model’s structure exhibits far better performance.

This paper is joint work with Kirill Borusyak (University College London) and Brian K. Kovak (Carnegie Mellon University).

Rafael Dix-Carneiro
Associate Professor of Economics at Duke University

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