Dear all, in order to make a GMM, separating firms
with high growth opportunities from low ones, I need
to compute two different regressions. 
This is my variables list:   company, year (from
1980 to 1990), id (1, 2, 3...), var1, var2... ,
highorlow (it is an already created column of 1 and
0, a number for each firm). 
Could somebody write me command-examples using this
dummy? 
Thank you!
Samuel
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