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uniqu
2008 Dec 16
1
Prediction intervals for zero inflated Poisson regression
Dear all,
I'm using zeroinfl() from the pscl-package for zero inflated Poisson
regression. I would like to calculate (aproximate) prediction intervals
for the fitted values. The package itself does not provide them. Can
this be calculated analyticaly? Or do I have to use bootstrap?
What I tried until now is to use bootstrap to estimate these intervals.
Any comments on the code are welcome.
2012 Jan 17
2
pscl package and hurdle model marginal effects
...NAME, type= "count")) returns 4.5 and I expected it to be less than 1. I would also have expected COUNT to match up with the truncated Poisson count model. What is the intuition here?
Also, when I try XXX = PROB, I get the following error:
Error in matrix(NA, nrow = length(mu), ncol = nUnique) :
too many elements specified
So maybe there are other problems.