sigma2_e | .0330219 .0017518 18.85 0.000 .0295885 .0364553 ---+--- SR_Direct | tr | .2989721 .0434914 6.87 0.000 .2137306 .3842135 pgdp | .0075541 .0150968 0.50 0.617 -.0220351 .0371433 lnwg | .1729589 .0708084 2.44 0.015 .034177 .3117409 op | -.2922829 .0270223 -10.82 0.000 -....
quiivregresststivhausmanivlsconstantsigmamore由于传统的豪斯曼检验在异方差的情形下不成立故进行异方差稳健的dwh检验statendogenous使用ivreg2检验选择的工具变量是否为内生解释变量ivreg2lwexprtenurernsmsaiqmedkwwrendogiqendogiq表示检验变量iq是否为内生变量若果存在异方差则gmm2sls更有效率故进行最优gmm估计ivregres...