topic pre post zero inflated model? in Statistical Procedures https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/578259#M28401 <P>I understand that nlmixed is required for longitudinal zero inflated models. But given that I only have 2 time periods, will I be fine in genmod? Can I still put time in the repeated statement?</P> Thu, 01 Aug 2019 03:10:30 GMT telligent 2019-08-01T03:10:30Z pre post zero inflated model? https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/578259#M28401 <P>I understand that nlmixed is required for longitudinal zero inflated models. But given that I only have 2 time periods, will I be fine in genmod? Can I still put time in the repeated statement?</P> Thu, 01 Aug 2019 03:10:30 GMT https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/578259#M28401 telligent 2019-08-01T03:10:30Z Re: pre post zero inflated model? https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/578712#M28411 <P>GENMOD cannot fit a zero-inflated model with repeated measures.&nbsp;</P> Fri, 02 Aug 2019 14:14:49 GMT https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/578712#M28411 StatDave 2019-08-02T14:14:49Z Re: pre post zero inflated model? https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/578803#M28413 <P>I realize that glimmix and nlmixed don't do it either.&nbsp; Is it because it is impossible or non-sensical or just because it is hard to difficult program?&nbsp;</P> Fri, 02 Aug 2019 19:21:15 GMT https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/578803#M28413 telligent 2019-08-02T19:21:15Z Re: pre post zero inflated model? https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/579212#M28423 <P>You can fit zero-inflated models using PROC NLMIXED as shown in <A href="http://support.sas.com/kb/44354" target="_self">this note</A>. You could add a RANDOM statement in that procedure.&nbsp;</P> Mon, 05 Aug 2019 19:02:19 GMT https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/579212#M28423 StatDave 2019-08-05T19:02:19Z Re: pre post zero inflated model? https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/579429#M28426 <P>Is it like the random residual in glimmix or a g-side random effect? or can it be used both ways?</P> Tue, 06 Aug 2019 15:55:01 GMT https://communities.sas.com/t5/Statistical-Procedures/pre-post-zero-inflated-model/m-p/579429#M28426 telligent 2019-08-06T15:55:01Z