Comments (2)
Hello,
I consider the Poisson and Zero-Inflated Poisson Distribution OR the Negative Binomial and Zero-Inflated Negative Binomial to be non-nested and therefore use the Vuong Test to compare the distributional model fits. In addition, I consider the Negative Binomial and Poisson distribution to be nested and thus use the likelihood ratio test to compare the distributional model fits. There is no model fit comparison of Negative Binomial with Zero-Inflated Poisson or Poisson with Zero-Inflated Negative Binomial.
You can find more information concerning evaluation metrics and comparisons in the supplements of the original powsimR publication.
I hope I was able to answer your questions.
Kind regards
Beate
from powsimr.
Yes, you did! Thank you!
from powsimr.
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