Does the Negbin in Proc NLMIX refer to Negative binomial -1 or Negative Binomial 2?
Here is the documentation for the NLMIXED procedure. The "Details" section discusses the two negative binomial parameterizations and shows how to use both in the procedure.
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Learn the difference between classical and Bayesian statistical approaches and see a few PROC examples to perform Bayesian analysis in this video.
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