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st: question about monte carlo study


From   Rudy Fichtenbaum <rudy.fichtenbaum@wright.edu>
To   statalist@hsphsun2.harvard.edu
Subject   st: question about monte carlo study
Date   Tue, 14 Apr 2009 11:22:46 -0400

I am running a monte carlo simulation using the following program:

capture program drop olssim
program olssim, rclass
version 10.0
drop _all
set obs 100
generate e = invnorm(uniform())*2
generate x = uniform()*10
generate y = 1 + 0.5 * x + e
regress y x
return scalar b0 = _coef[_cons]
return scalar b1 = _coef[x]
end

simulate "olssim" b0 = r(b0) b1 = r(b1), reps(1000)

sum b0 b1, detail

The problem I am having is that each time I run the program I get a slightly different result. I know this is because I have not set the seed for the random number generator but I can't figure out how to set the seed in this program.

Rudy

--
Rudy Fichtenbaum
Professor of Economics
Chief Negotiator AAUP-WSU
Wright State University
Dayton, OH 45435-0001
937-775-3085

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