求助各位大神,用stata做了hauseman检验变量的内生性
命令如下 quietly ivreg aroea sizea fcfa tena agrowtha debta ctrl (mall=size fcf ten agrowth ctrl)
. est store IV_reg
. quietly ivreg aroea sizea fcfa tena agrowtha debta ctrl mall
. est store LS_reg
. hausman IV_reg LS_reg
显示的结果
(b) (B) (b-B) sqrt(diag(V_b-V_B))
IV_reg LS_reg Difference S.E.
mall -43.9528 .5594791 -44.51228 76.87
sizea .9307205 .5910599 .3396606 .9305392
fcfa 3.277376 3.377428 -.1000511 1.152152
tena .1465006 .1406408 .0058598 .0450646
agrowtha 5.976841 4.047705 1.929136 4.001395
debta -11.93721 -6.715406 -5.221802 9.736844
ctrl 9.845206 1.612151 8.233055 14.29256
b = consistent under Ho and Ha; obtained from ivreg
B = inconsistent under Ha, efficient under Ho; obtained from ivreg
Test: Ho: difference in coefficients not systematic
chi2(7) = (b-B)'[(V_b-V_B)^(-1)](b-B)
= 0.34
Prob>chi2 = 0.9999
怎么解读?


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