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TRPOIS0: Stata module to estimate zero-truncated Poisson regression models


  • Joseph Hilbe

    () (Arizona State University)


trpois0 estimates maximum likelihood zero-truncated Poisson regression models using Stata's ml method for estimation. A 0-truncated Poisson model is appropriate when modeling count data which does not have values of 0. This is to be distinguished from data sets without 0 values, but which may have 0's. For example, length of hospital stay data (LOS) begins with patients having a LOS of 1. 0 values are not allowed. This is a situation where a truncated model is appropriate. trpois0 implements the cluster, robust, and score options.

Suggested Citation

  • Joseph Hilbe, 1997. "TRPOIS0: Stata module to estimate zero-truncated Poisson regression models," Statistical Software Components S329001, Boston College Department of Economics.
  • Handle: RePEc:boc:bocode:s329001

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