Dear all,
�
we want to estimate a regression model (Zellners SUR model) with some
restrictions on parameters and equal explanatory variables. Especially we
want to say that the parameters have to be between 0 and 1.
At the moment we wrote
�
Constraint define 1 [eq1]variable1>=0 & [eq1]variable1<=1
Sureg (yvar1-yvar3 = variable1), cons(1)
�
The error message we get is
�
'not possible with test � r(131)'
�
What did we wrong? Finally, it turns out that the question is: How to write
the constraint?!
Thank you in advance,
�
Stephan
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