Bastian,
See -help levelsof-.
levelsof Observation_Year, local(years)
foreach y of local years {
reg dependent_var indep_var1 indep_var2 if Observation_Year <= `y',
robust cluster (firms)
}
Friedrich
On Sun, Oct 5, 2008 at 8:16 AM, <[email protected]> wrote:
> Dear Stata users ,
>
> I am using this command to run a OLS regression:
>
> forvalues i=1977/2007 {
> reg dependent_var indep_var1 indep_var2 if Observation_Year <= `i', robust cluster (firms)
> }
>
> However, STATA displays in this case "no observations" and it is not possible to run the regression.
>
> For instance, in 1980, I have observations of the second independent variable and the dependent variable only, but I thought that STATA would ignore this year and continue the regression in 1981 instead. Obviously, it is not the case!
>
> So what should I do about this problem ? Any ideas???
>
> Thank you very much !
>
> Bastian S
> --
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