I have a panel data. The dependent variable is a count variable, so a Poisson regression is more appropriate than a linear regression. I am aware how to use xtpoisson and xthtaylor. But xtpoisson does not allow for Hausman-Taylor estimator, and the latter does not allow for Poisson distribution for dependent variables. I am wondering is there any existing command for Poisson regression with Hausman-Taylor estimators? Or any reference I could check so that I could execute on my own?