Variance Specification in Event Count Models : From Restrictive Assumptions to a Generalized Estimator *

  title={Variance Specification in Event Count Models : From Restrictive Assumptions to a Generalized Estimator *},
  author={Gary King},
This paper discusses the problem of variance specification in models for event count data. Event counts are dependent variables that can take on only nonnegative integer values, such as the number of wars or coups d'etat in a year. I discuss several generalizations of the Poisson regression model, presented in King (1988), to allow for substantively interesting stochastic processes that do not fit into the Poisson framework. Individual models that cope with, and help analyze, heterogeneity… CONTINUE READING
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