Maybe the poster means:
use http://fmwww.bc.edu/ec-p/data/wooldridge/card, clear
sqreg wage educ, q(.5 .75)
test [q50]educ=[q75]educ
On Sat, Jul 11, 2009 at 12:24 PM, Maarten buis<[email protected]> wrote:
>
> --- On Sat, 11/7/09, Murtaza, Fowad wrote:
>> Could someone guide me with the code for testing the null
>> hypotheses that the coefficients of the quantiles are
>> same for both qreg and sqreg programs.
>
> They should be exactly the same. Citing from the helpfile:
> "-sqreg- estimates simultaneous-quantile regression. It
> produces the same coefficients as -qreg- for each quantile."
> So there is no need to do any testing.
>
> -- Maarten
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