why is the sandwich estimate used can the sandwich estimate protect against the correlation misspecification what type of geek analysis is used for sandwich estimation why do they use sandwich estimates? why are sandwich estimates used in genee what does the gee sandwich estimate protect why is the sandwich estimate used what protects against heteroscedasticity why use sandwich estimation for longitudinal data what does the sandwich estimate protect against why is the sandwich estimate useful in gee why use sandwich estimate does a sandwich estimate protect against an exchangeable correlation? what is the purpose of a sandwich estimate what is the role of the sandwich estimate how does a sandwich estimator protect from miss specification? what is the purpose of the sandwich estimate? what is the sandwich estimate used for when is the sandwich estimate useful in gee why is the sandwich estimate used to protect against the standard error