Stephan--
If you want to write
constraint define 1 [y1]x1=[y2]x2
constraint define 2 [y2]x2=[y3]x3
for numbers 1 to n, just use -forval- or -foreach- to write a loop.
forv i=1/30 {
constraint define `i' [y`i']x`i'=[y`i']x`i'
}
Or did you have something else in mind? You will get better advice
from the list if you supply the required information...
On 12/22/06, Stephan Brunow <[email protected]> wrote:
Dear Austin,
thank you for answering. The problem is that y1 to y_n are various equations
with different issues. I.e. this is a CES-type demand system. There might be
(for further models) some other covariates where the beta_i are not
necessarily the same.
If I run your suggestion then there is another beta-coefficient than if I do
the following:
I played a bit around in STATA constraints with only 3 equations and coded
the problem as follows
constraint define 1 [y1]x1=[y2]x2
constraint define 2 [y2]x2=[y3]x3
That works. I think, it gets out of hand for more equations.
Is there a shorter way to code that for more equations?
Many thanks,
Stephan
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