proc model gmm ;
parms a0 a1 a2 a3 a4 a11 a12 a13 a14 b1 b2 b11 b12 b22
d11 d21 d31 d41 d12 d22 d32 d42 d14 d24 d34 d42 e2 e3 fz1 fz2 fz4 bu1-bu3 ;
exogenous x1 x2 x3 x4 fix1 fix2 fix4 period2 period3 ;
phi=a0+a1*x1+a2*x2+a3*x3+a4*x4+.5*a11*x1*x1+a12*x1*x2+a13*x1*x3+a14*x1*x4
+b1*y1t+b2*y2t+.5*(b11*y1t*y1t+2*b12*y1t*y2t+b22*y2t*y2t)+d11*x1*y1t+d21*x2*y1t+d31*x3*y1t+d41*x4*y1t
+d12*x1*y2t+d22*x2*y2t+d32*x3*y2t+d42*x4*y2t+e2*period2+e3*period3+fz1*fix1+fz2*fix2+fz4*fix4
-(bu1*u1+bu2*u2+bu3*u3);
fit phi/outest=est1 out=resid outall covout ;
instruments t3-t15 u1-u3 tu1-tu29 period2 period3 fix1 fix2 fix4
x1 x2 x3 x4 x1x1 x1x2 x1x3 x1x4 tx1 tx2 tx3 tx4 lnwage;
run;



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