English, Article edition: ZIP: Stata module to estimate zero inflated Poisson model on count data Jesper Sorensen

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Bookmark: http://trove.nla.gov.au/version/102937
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  • code
Language
  • English

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Title
  • ZIP: Stata module to estimate zero inflated Poisson model on count data
Author
  • Jesper Sorensen
Physical Description
  • code
Notes
  • zip estimates Zero Inflated Poisson models on count data. This model allows for "excess zeros" in count models under the assumption that the population is characterized by two regimes, one where members always have zero counts, and one where members have zero or positive counts. The likelihood of being in either regime is estimated using a logit specification, while the counts in the second regime are estimated using a Poisson specification. See Long (1997) Chapter 8 and Greene (1997) for a discussion. zippred will generate predicted counts (using the default xb option) or the predicted probability of different counts (using prob). zippred should be used instead of predict.
  • RePEc:boc:bocode:s354001
Language
  • English
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