Leonor,
there is a better alternative to -while- in this case.
Try the following:
foreach x of varlist ind1 ind2 ind3 ind4 ind5 ind6 ind7 ind8 ind9 {
regress TAX EXP if `x'==1, robust
predict tax_hat_`x'
xtreg INV tax_hat_`x' if `x'==1, fe vce(bootstrap)
}
Hope this helps,
Eva
2008/3/3, Leonor Saravia <[email protected]>:
> Dear Statalisters,
>
> I'm learning how to make some programs in Stata, but I�m having
> problems in using the 'while' command.
>
> My database looks like this:
>
> FIRM_ID IND1 IND2 IND3 .....IND9 TAX INV
> 120 1 0 0 0 0.16 100
> 123 0 1 0 0 0.16 200
> 120 1 0 0 0 0.15 150
> 134 0 0 0 1 0.16 180
> 123 0 1 0 0 0.15 200
> 134 0 0 0 1 0.15 120
> .
> .
> 123 0 1 0 0 0.17 130
>
> I need to do a two step regression by the variable IND, this is: when
> IND1==1, IND2==1, IND3==1, ...,IND9==1, I need that Stata runs this
> programm:
> First step:
> regress TAX EXP, robust
>
> predict tax_hat
> Second step:
> xtreg INV tax_hat, fe
> end
>
> So, what I was trying to do in my do-file was (and it's not working):
>
> local industria "ind1 ind2 ind3 ind4 ind5 ind6 ind7 ind8 ind9"
>
> while `industria' == 1 {
>
> reg tax exp, robust
>
> predict double tax_hat
>
> xtreg ln_inv tax_hat, fe vce(bootstrap)
>
> drop tax_hat
>
> }
>
> But when I do this, Stata gives me this message: program error:
> code follows on the same line as open brace
>
> I don�t understand what�s the problem so I'd appreciate your help very much.
>
> Thanks,
>
> Leonor
>
> *
> * For searches and help try:
> * http://www.stata.com/support/faqs/res/findit.html
> * http://www.stata.com/support/statalist/faq
> * http://www.ats.ucla.edu/stat/stata/
>
*
* For searches and help try:
* http://www.stata.com/support/faqs/res/findit.html
* http://www.stata.com/support/statalist/faq
* http://www.ats.ucla.edu/stat/stata/
