Hello everyone
I hope that you're doing very well
I have a panel data for 35 countries from 1985 to 2014, i've transformed my data to 5 year average data (1985-89 , 1990-94 ..) with the collapse(mean) command
i'm working with the following gmm command (two step system gmm)

xtabond2 PIB_tete l.PIB_tete M3PIB PRIVATE BASSET CENT Do Inf , gmm (L2. M3PIB PRIVATE BASSET Inf, collapse) iv( Do GPIB Inf) nodiffsargan twostep robust orthogonal small

-The problem is that, when i run this command in stata i have insigificant results, how can i solve this problem?
-How can i have the estimations for each period , what is the right xtabond2 command to work with? i want the estimations for each 5 year so that i can observe the changes among the years?

Thank you