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From | ABDUL ADAM <bihiabdul@yahoo.com> |
To | "statalist@hsphsun2.harvard.edu" <statalist@hsphsun2.harvard.edu> |
Subject | st: imposing cross-equation constrains with nlsur |
Date | Tue, 7 Jun 2011 11:32:46 -0700 (PDT) |
Dear All, I am estimating a system of equations by nlsur and I am trying to impose demand theory restrictions but I am unable to get what I want. I have 14 equations, but for illustration, I take only three here: constraint 2 [w1]exp1 + [w2]exp2 + [w3]exp3 = 0 nlsur(w1=capphi1*({a1}+{lag11}*l1w1+{p11}*lnp1+{p12}*lnp2+{p13}*lnp3+{exp1}*expP +res)+ /// {ph1}*phi1) /// (w2=({a2}+{lag22}*l1w2+{p21}*lnp1+{p22}*lnp2+{p23}*lnp3+{exp2}*expP +res)) /// (w3=capphi3*({a3}+{lag33}*l1w3+{p31}*lnp1+{p32}*lnp2+{p33}*lnp3+{exp3}*expP +res)+ /// {ph3}*phi3), constraints(2) I am getting this error back:constraints(2) not allowed. I tried to figure out how to solve this but to no avail. I appreciate any advice/help on this. Kind Regards, Abdul * * For searches and help try: * http://www.stata.com/help.cgi?search * http://www.stata.com/support/statalist/faq * http://www.ats.ucla.edu/stat/stata/