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Changes in Marital Sorting: Theory and Evidence from the US

Author

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  • Chiappori, Pierre-André
  • Costa Dias, Monica
  • Meghir, Costas
  • Zhang, Hanzhe

Abstract

Positive assortative matching refers to the tendency of individuals with similar characteristics to form partnerships. Measuring the extent to which assortative matching differs between two economies is challenging when the marginal distributions of the characteristic along which sorting takes place (e.g., education) change for either or both sexes. We show how the use of different measures can generate different conclusions. We provide axiomatic characterization for measures such as the odds ratio, normalized trace, and likelihood ratio, and provide a structural economic interpretation of the odds ratio. We then use our approach to consider how marital sorting by education changed between the 1950s and the 1970s cohort, for which both educational attainment and returns in the labor market changed substantially.

Suggested Citation

  • Chiappori, Pierre-André & Costa Dias, Monica & Meghir, Costas & Zhang, Hanzhe, 2025. "Changes in Marital Sorting: Theory and Evidence from the US," CEPR Discussion Papers 20271, C.E.P.R. Discussion Papers.
    • Handle: RePEc:cpr:ceprdp:20271
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    File URL: https://cepr.org/publications/DP20271
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    Keywords

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    JEL classification:

    • C78 - Mathematical and Quantitative Methods - - Game Theory and Bargaining Theory - - - Bargaining Theory; Matching Theory
    • D1 - Microeconomics - - Household Behavior
    • J1 - Labor and Demographic Economics - - Demographic Economics

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