spss只知能做二阶段最小二乘,下面仅对sas中3sls案例提供参考
The 3SLS option in the PROC SYSLIN statement specifies the three-stage least squares method, as shown in the following statements.
proc syslin data=in 3sls;
endogenous p;
instruments y u s;
demand: model q = p y s;
supply: model q = p u;
run;