[R] zero truncated poisson regression

Ben Bolker bbolker at gmail.com
Sun Jul 31 20:32:40 CEST 2011

Mitchell Maltenfort <mmalten <at> gmail.com> writes:

> Pscl package.
  I'm not sure pscl will do zero-truncated (alone, as opposed to
as part of a hurdle model) regression.  countreg (on r-forge),
as pointed out in the previous response, should work.  Also
see ?Pospois in the VGAM package, or define your own "dztpois()"
function for the zero-truncated poisson and use it in mle2
(in the bbmle package).

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