two-part models

Thu, May 26, 2005 7:28 AM

Hello,

Is there a library that can be used to implement two-part models for
data with 'extra' zeros?  I am already aware of some of the
zero-inflated poisson functions out there and of the negative binomial
glm option. Thanks.

Richard

Richard Chandler
Department of Natural Resources Conservation
UMass Amherst
(413)545-1237