# CPOISSONE: Stata module to estimate censored Poisson regression (econometric parameterization)

*Joseph Hilbe*

Statistical Software Components from Boston College Department of Economics

**Abstract:**
cpoissone fits a censored Poisson maximum-likelihood regression of depvar on indepvars, where depvar is a non-negative count variable. The censor option is required. If no observations are censored, a censor variable with all 1's must be specified. Interpret parameter estimates as one would poisson. Cuts are numerically defined at the left censor site, cleft(), or right censor site cright(). Interpretation is the standard censored Poisson model as parameterized in econometric literature. Values to the outside of the defined cut points are revalued to the value(s) of the cuts. The econometric parameterization is to be distinguished from the survival parameterization, cpoisson. Reference: Hilbe, Joseph M (2007), Negative Binomial Regression (Cambridge University Press)

**Language:** Stata

**Requires:** Stata version 11

**Keywords:** Poisson regression; censoring; maximum likelihood; count data (search for similar items in EconPapers)

**Date:** 2009-09-29, Revised 2009-10-18

**Note:** This module should be installed from within Stata by typing "ssc install cpoissone". Windows users should not attempt to download these files with a web browser.

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**Downloads:** (external link)

http://fmwww.bc.edu/repec/bocode/c/cpoissone.ado program code (text/plain)

http://fmwww.bc.edu/repec/bocode/c/cpoissone.sthlp help file (text/plain)

http://fmwww.bc.edu/repec/bocode/c/cpoisxll.ado program code (text/plain)

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**Persistent link:** https://EconPapers.repec.org/RePEc:boc:bocode:s457079

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