Re: st: while loop

[Steven Samuels <sjhsamuels@earthlink.net>]

-rolling-



-Steve


On Jul 4, 2008, at 1:31 PM, Indrit Hoxha wrote:

> I have a panel dataset with countries and years. I am trying to do  
> some regressions for every country in windows of 5 years. I want  
> these 5 years to be overlapping so for example for United States, I  
> want the first regression to be for 1980-1984, the second  
> 1981-1985, third 1982-1986 and goes on like this. I have used loop  
> within a loop to do this. As you can see from the do file below
> local i=1
>
> while `i'<131 {
>
> local j=1980
>
> while `j'< 2006 {
>
> reg y  x1 x2 x3  if cc==`i' & (year==`j'|year ==`j'+1|year ==`j'+2| 
> year ==`j'+3|year ==`j'+4)
>
> local j= `j'+1
>
> }
>
> local i= `i'+1
>
> }
>
> However I have missing data for some countries and years, so when  
> the loop starts if it does not find any data for the first country  
> and first group of years the do file stops.
> Could someone help me out here, how should I do these regressions.
> I'd really appreciate any help .
>
> Indrit Hoxha
> PhD Candidate
> University of Houston
> Department of Economics
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