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Local hazard models.

L L Wu, N B Tuma

    Sociological Methodology
    |January 1, 1990
    PubMed
    Summary
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    This study introduces local hazard models for flexible baseline hazard rates and nonproportional covariate effects. These models offer improved insights into phenomena like first marriage compared to traditional global models.

    Area of Science:

    • Survival analysis
    • Statistical modeling
    • Demography

    Background:

    • Traditional survival models often rely on global parametric assumptions, limiting flexibility.
    • Estimating baseline hazard rates and covariate effects can be challenging with nonproportional hazards.

    Purpose of the Study:

    • Introduce a novel class of local hazard models.
    • Enable flexible estimation of baseline hazard rates and nonproportional covariate effects.
    • Apply these models to analyze first marriage patterns.

    Main Methods:

    • Developed local hazard models with local parametric assumptions.
    • Utilized local likelihood methods for model estimation.
    • Applied models to U.S. Current Population Survey data (June 1980).
    Keywords:
    AmericasComparative StudiesDeveloped CountriesMarriageMarriage PatternsMethodological StudiesModels, TheoreticalNorth AmericaNorthern AmericaNuptialityResearch MethodologyStudiesUnited States

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    Main Results:

    • Local exponential and Gompertz models provided estimates closely matching nonparametric results.
    • Local models captured subgroup variations effectively.
    • Demonstrated ability to yield substantive insights not evident in global models.

    Conclusions:

    • Local hazard models offer a flexible alternative to global models in survival analysis.
    • These models enhance understanding of complex demographic processes like first marriage.
    • Local likelihood methods are effective for estimating these flexible hazard models.