stata probit回归以后没有Z值,只有x-bar,这是什么意思啊
Probit regression, reporting marginal effects Number of obs = 10917
Wald chi2(0) = .
Prob > chi2 = .
Log pseudolikelihood = -1701.1324 Pseudo R2 = 0.0853
(Std. Err. adjusted for 1 clusters in govdummy)
------------------------------------------------------------------------------
| Robust
fdece | dF/dx Std. Err. z P>|z| x-bar [ 95% C.I. ]
---------+--------------------------------------------------------------------
lnasset | -.0048917 0 . . 11.2064 -.004892 -.004892
ROS | -.0171046 0 . . -.061761 -.017105 -.017105
lndis | .0061454 0 . . 6.31236 .006145 .006145


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