I am trying to find some resources on model validation for GEE-GLMs. Unfortunately I can't afford to purchase expensive textbooks and many of the books address GEEs using other software such as Stata.
Does anyone have good resources on the model validation process of GEE-GLMS particularly with respect to R packages that can be used? The Zuur textbook mentions that "The graphical validation uses Pearson residuals and follows the model validation steps of GLM." O know for GLMs we use residuals vs. fitted to check for homogeneity and a Q-Q plot of residuals to check for normality, but do we assess these same things in a GEE-GLM or are the assumptions different?
I haven't found R packages yet for how I would check the homogeneity and normality of residuals, and also how to plot the predictions of a GEE-GLM. Any help with this would be much appreciated!