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    How to interpret elasticity of standardized (Z-Score) predictor in NBM

    I have run a negative binomial regression for which I am calculating elasticity of the predictors using means (dy/dx)*(x/y). One of the predictors, dwell time, is unevenly distributed, so I am using a Z-Score of dwell time in the model. This predictor has a negative effect (Beta) on the outcome...
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    STATA Negative Binomial Regression results differ from SPSS

    SPSS is providing me expected results (significance of covariates) in a NBR Model. But I am also running the model in Stata and the results are different. Some covariates are significant across both with common valence (-/+), but some are not. I have already fixed the "parameterization of...