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A modified hurdle model for completed fertility

Author

Listed:
  • Francisco Covas

    (Instituto Nacional de Estati´stica, Lisboa, Portugal)

  • J.M.C. Santos Silva

    (ISEG, Universidade TÊcnica de Lisboa, R. do Quelhas 6, 1200 Lisboa, Portugal)

Abstract

In this paper it is argued that models for completed fertility have to take into consideration that childless couples and couples with an only child are qualitatively different from couples with two or more children. Indeed, these differences may be the cause of the underdispersion that characterizes completed fertility data. An empirical illustration using Portuguese data suggests that accounting for the qualitative difference between having zero, one, or more children leads to considerable improvements over a model of the type generally used to describe this sort of data.

Suggested Citation

  • Francisco Covas & J.M.C. Santos Silva, 2000. "A modified hurdle model for completed fertility," Journal of Population Economics, Springer;European Society for Population Economics, vol. 13(2), pages 173-188.
    • Handle: RePEc:spr:jopoec:v:13:y:2000:i:2:p:173-188
    Note: Received: 6 July 1998/Accepted: 14 January 1999
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    More about this item

    Keywords

    Count data; generalized poisson; hurdle models; underdispersion;
    All these keywords.

    JEL classification:

    • C25 - Mathematical and Quantitative Methods - - Single Equation Models; Single Variables - - - Discrete Regression and Qualitative Choice Models; Discrete Regressors; Proportions; Probabilities
    • J13 - Labor and Demographic Economics - - Demographic Economics - - - Fertility; Family Planning; Child Care; Children; Youth

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