Field and natural experiments in migration

David McKenzie and Dean Yang

Chapter 4 in Handbook of Research Methods in Migration, 2024, pp 48-82 from Edward Elgar Publishing

Abstract: Many research and policy questions surrounding migration are causal questions. We want to know what causes people to migrate, and what the consequences of migration are for the migrants, their families, and their communities. However, answering these questions requires dealing with the self-selection inherent in migration choices. Field and natural experiments offer methodological approaches that enable answering these causal questions. We discuss the key conceptual and logistical issues that face applied researchers when applying these methods to the study of migration, as well as providing guidance for practitioners and policymakers in assessing the credibility of causal claims. For randomized experiments, this includes providing a framework for thinking through what can be randomized; discussing key measurement and design issues that arise from issues such as migration being a rare event, and in measuring welfare changes when people change locations; as well as discussing ethical issues that can arise. We then outline what makes for a good natural experiment in the context of migration, and discuss the implications of recent econometric work for the use of difference-in-differences, instrumental variables (and especially shift-share instruments), and regression discontinuity methods in migration research. A key lesson from this recent work is that it is not meaningful to talk about "the" impact of migration, but rather impacts are likely to be heterogeneous, affecting both the validity and interpretation of causal estimates.

Keywords: Asian Studies; Development Studies; Economics and Finance; Geography; Politics and Public Policy Research Methods; Sociology and Social Policy; Urban and Regional Studies (search for similar items in EconPapers)
Date: 2024
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Related works:
Working Paper: Field and Natural Experiments in Migration (2022)
Working Paper: Field and Natural Experiments in Migration (2022)
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