[R] zero values in LHS and RHS
binabina at bellsouth.net
Wed Aug 2 05:02:28 CEST 2006
I have a data set where i need to predict hotel stays in a 3 month
period by customer. I have stays for each customer in the 3 month
period and the previous 3 month period + other variables. these stays
contain an integer that ranges from 0 to 10. classic poisson distribution.
my question is around zeros. usually we could take logs on the stays
and run an OLS model i think an enhancement would be to fit a poisson
GLM model. i am confused about handling of zeros. i will have zero
values on the RHS and potentially on the LHS. It seems like the poisson
GLM model can handle zeros on the LHS and RHS. i guess my question is
fitting a poisson GLM, are zeros allowed? If so, how is this estimated
with a log link function?
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