Hi all, I'm using pglm package to estimate a static random probit model of the type: Yi,t = B1X1i,t-k +... + BzXzi,t-k + Ci+ Ui,t Where Yi={0,1} and all explenatory variables are continuous. the function I use is: pglm(formula,, Data, family = binomial(probit), model = "random",method= "bfgs") Can I test the exogeneity and zero correlation between the explanatory variables and ci? Or the function carries in an approach (as Mundlak-Chamberlain) to overcome the endogeneity between regressors and effects? Thanks Alfonso