Tongyun Li posted on Wednesday, September 25, 2013 - 3:20 pm
I'm trying to run a multiple group logistic regression. I hope to compare the model without constraints and the model for which the regression coefficients are constrained to be equal across groups. The problem is that I have to use TYPE=COMPLEX with population weights and replicate weights to draw inference because the data is from a large-scale survey. It seems that DIFFTEST doesn't work with TYPE=COMPLEX. Is there another way to do model comparison test if I have to use TYPE=COMPLEX and plug in weights in my analysis?