hello,
As part of a Monte Carlo study

I have the following population regression model:
Y= 262 -0.006X2-2.4X3+u

I was told to assume that u is normally distributed with N(0,42)
I have to Generate 64 observations for u
I have to combine the observations with the 64 observations on X2 and X3 in a table that I already have to estimate the corresponding sample regression model Betahat1 Betahat 2 and Betahat3 using the OLS method. Save the estimated coefficients.

Then they want me to repeat that 20 times. Is there a shortcut to create u, u1,u2...u20 where each of them is N(0,42) and gets added to my editor then I want a command that regresses my X2 and X3 and each of the Us on my Y. So I have to have 20 regressions. I wanna do that in one command. Is there a way? Please help.