Zero Inflated Poisson in JMP

Question

Hello Everyone:

I am working with a few advanced undergraduate students and using JMP more frequently (now that we have a university wide license). Is anyone able to tell me if JMP allows me to run a Zero Inflated Poisson model in the 'Fit Model' window (Personality = Generalized Linear Model;  Distribution = Poisson; Link Function = Log) or if this can only be done in the script window? The data is suitable for this distribution but having a problem in JMP 9.0.2

Thank You!!

Gabriel

(Dept. of Sociology

University of Texas at San Antonio)

sasuser11466 · Answer

Thanks so much Ron! I will give that overdispersion feature a try as well.

many Thanks! Gabriel

ron_horne · Answer

hi Gabriel,

using the Fit Model with the specifications you mentioned is what i did in the past to run the model and it did run with my data using JMP 9 at the time. another thing i use is the overdispersion tests and intervals and the Firth bias-adjusted estimates. i actually run the models twice with and without them to inspect robustness.

From my experience, if something in the Fit Model platform is not working properly, i try fitting each X separately to the Y to determine which of the variables is the source of the problem.

ron