st: create variable from regression coefficients

[Muhammed Altuntas <ma9545@bdvb.de>]

Dear Statalist,

I am having trouble with what for many of you will be a basic question.
I want to access regression coefficients as variables for further 
analysis.
What I am trying to do is as follows:

1. Run a system gmm regression and calculate coefficients
2. Capture the coefficient for the lagged dependent variable, which is 
one of the independent variables in my model

The lagged dependent variable (which is the independent variable in my 
model) automatically gets the operator “L1.”

I tried the following to solve my problem:

qui xi: xtdpdsys wins_lev4, pre(`modelxy2') twostep vce(gmm);
matrix b1 = b["_L1_wins_lev4", 1];
svmat b1;

But this did not work…
Can you help me?

Many thanks
Mehmet Altun

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