Exporting results from regressions in Excel - stata

Question

I want to store results from ordinary least squares (OLS) regressions in Stata within a double loop.
Here is the structure of my code:
foreach i2 of numlist 1 2 3{
foreach i3 of numlist 1 2 3 4{
quiet: eststo: reg dep covariates, robust
}
}
The end goal is to have a table in Excel composed by twelve rows (one for each model) and seven columns (number of observations, estimated constant, five estimated coefficients).
Any suggestion on how can I do this?

Answer 1

Such a table can be created simply by using the community-contributed command esttab:
sysuse auto, clear
eststo clear
eststo m1: quietly regress price weight
eststo m2: quietly regress price weight mpg
quietly esttab
matrix A = r(coefs)'
matrix C = r(stats)'
tokenize "`: rownames A'"
forvalues i = 1 / `=rowsof(A)' {
if strmatch("``i''", "*b*") matrix B = nullmat(B) \ A[`i', 1...]
}
matrix C = B , C
matrix rownames C = "Model 1" "Model 2"
Result:
esttab matrix(C) using table.csv, eqlabels(none) mlabels(none) varlabels("Model 1" "Model 2")
----------------------------------------------------------------
weight mpg _cons N
----------------------------------------------------------------
Model 1 2.044063 -6.707353 74
Model 2 1.746559 -49.51222 1946.069 74
----------------------------------------------------------------