I apologize if this has been asked before, but I looked around and couldn't find an answer.

For a regression you can do
Code:
//Regression #1
regress y x
estimates store reg1
//Regression #2
regress y x2 x3 x4
estimates store reg2
...
estimates table reg1 reg2...
Can you do something to get a similar aggregate table of sum ouputs?

Thanks