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Migration and the epidemiological approach: Time and self-selection into foreign ancestries matter

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  • Bertoli, Simone
  • Clerc, Melchior
  • Loper, Jordan
  • Roca Fernández, Èric

Abstract

The epidemiological approach in comparative development uses data on individuals of immigrant origin to study cultural persistence, the determinants of cultural norms, and the effects of genetic traits. A common assumption of this methodology is its susceptibility to attenuation bias. We challenge it by demonstrating how the increasing reliance on foreign ancestries to identify respondents’ origins can introduce confounding biases. Specifically, self-selection in reporting foreign ancestry and unobserved variation in ancestral migration timing may lead to inflated estimates. We formalize these mechanisms through a theoretical framework and illustrate their empirical significance by reassessing key findings from influential studies by Fernández and Fogli (2006) and Giuliano and Nunn (2021).

Suggested Citation

  • Bertoli, Simone & Clerc, Melchior & Loper, Jordan & Roca Fernández, Èric, 2025. "Migration and the epidemiological approach: Time and self-selection into foreign ancestries matter," Journal of Development Economics, Elsevier, vol. 176(C).
    • Handle: RePEc:eee:deveco:v:176:y:2025:i:c:s0304387825000562
    DOI: 10.1016/j.jdeveco.2025.103505
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    More about this item

    Keywords

    Comparative development; Migration; Ancestry; Culture; Identity choice;
    All these keywords.

    JEL classification:

    • F22 - International Economics - - International Factor Movements and International Business - - - International Migration
    • Z10 - Other Special Topics - - Cultural Economics - - - General

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