Comparing tow coefficients in two differents two-step system GMM

[Gaston Desousse]

I wish to compare the coefficients of two different variables, X1 and X2, in two separate GMM models with the same dependent variable Y. In the first step, I need to calculate the standardized coefficients and then find a solution to compare these coefficients. I am using xtabond2 as a function. Can someone suggest the steps to follow? Thank you for your help