Accounting for selectivity and duration-dependent heterogeneity when estimating the impact of emigration on incomes and poverty in sending areas
The impacts of international emigration and remittances on incomes and poverty in sending areas are increasingly studied with household survey data. But comparing households with and without emigrants is complicated by a triple-selectivity problem: first, households self-select into emigration; second, in some emigrant households everyone moves while others leave members behind; and third, some emigrants choose to return to the origin country. Allowing for duration-dependent heterogeneity introduces a fourth form of selectivity -- one must now worry not just about whether households migrate, but also when they do so. This paper clearly sets out these selectivity issues and their implications for existing migration studies, and then addresses them by using survey data designed specifically to take advantage of a randomized lottery that determines which applicants to the over-subscribed Samoan Quota may immigrate to New Zealand. The analysis compares incomes and poverty rates among left behind members in households in Samoa that sent Samoan Quota emigrants with those for members of similar households that were unsuccessful in the lottery. Policy rules control who can accompany the principal migrant, providing an instrument to address the second selectivity problem, while differences among migrants in which year their ballot was selected allow for estimation of duration effects. The authors find that migration reduced poverty among former household members, but they also find suggestive evidence that this effect may be short-lived as both remittances and agricultural income are negatively related to the duration that the migrant has been abroad.
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- Richard Brown & Gareth Leeves, 2011. "Comparative effects of migrants' remittances on composition of recipient household income in two small, island economies," Applied Economics, Taylor & Francis Journals, vol. 43(27), pages 3965-3976.
- Sebastian Gundel, 2008. "What determines the duration of stay of immigrants in Germany?," International Journal of Social Economics, Emerald Group Publishing, vol. 35(11), pages 769-782, September.
- Sebastian Gundel & Heiko Peters, 2008. "What Determines the Duration of Stay of Immigrants in Germany?: Evidence from a Longitudinal Duration Analysis," SOEPpapers on Multidisciplinary Panel Data Research 79, DIW Berlin, The German Socio-Economic Panel (SOEP).
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