model="logit.gee", id="Location",corstr="exchangeable", data=y2010) NULL I am running Zelig 4.2-1 and using the "logit.gee" model link to fit a model. I am trying to get a print out of the model residuals to use to test for spatial autocorrelation; however, when I try to get the print out it says null. My model is. I do not get any errors when I run the model and I get coefficients and cun run Wald test. Any help or ideas would be greatly appreciated.