heckman risk gender age top1 zcfzl size roe board ddbl, select(exp=gender age top1 zcfzl size roe board ddbl percent)
> twostep
Heckman selection model -- two-step estimates Number of obs = 6,555
(regression model with sample selection) Censored obs = 5,597
Uncensored obs = 958
Wald chi2(8) = 363.97
Prob > chi2 = 0.0000
------------------------------------------------------------------------------
| Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
risk |
gender | -.2532742 .2547499 -0.99 0.320 -.7525748 .2460264
age | .2432252 .0312531 7.78 0.000 .1819703 .3044801
top1 | .0083938 .00385 2.18 0.029 .0008479 .0159398
zcfzl | -.7170375 .3360782 -2.13 0.033 -1.375739 -.0583363
size | .6592463 .0546719 12.06 0.000 .5520915 .7664012
roe | 4.142754 .6124214 6.76 0.000 2.94243 5.343077
board | -.0166049 .0353882 -0.47 0.639 -.0859645 .0527547
ddbl | 2.214188 1.095667 2.02 0.043 .0667202 4.361657
_cons | -13.63513 2.250645 -6.06 0.000 -18.04631 -9.223943
-------------+----------------------------------------------------------------
exp |
gender | -.0874627 .1175669 -0.74 0.457 -.3178897 .1429643
age | .2014281 .0051346 39.23 0.000 .1913646 .2114917
top1 | -.0010002 .0018295 -0.55 0.585 -.0045859 .0025855
zcfzl | -.0654598 .1574346 -0.42 0.678 -.3740259 .2431062
size | -.0037287 .0255014 -0.15 0.884 -.0537106 .0462532
roe | .0783537 .2795549 0.28 0.779 -.4695638 .6262713
board | .0124551 .0166148 0.75 0.453 -.0201093 .0450195
ddbl | 1.721583 .5024246 3.43 0.001 .7368489 2.706317
percent | 5.941052 .4104136 14.48 0.000 5.136656 6.745448
_cons | -13.08425 .5915994 -22.12 0.000 -14.24376 -11.92473
-------------+----------------------------------------------------------------
mills |
lambda | 1.927444 .2602101 7.41 0.000 1.417442 2.437447
-------------+----------------------------------------------------------------
rho | 0.92079
sigma | 2.0932397
------------------------------------------------------------------------------
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end of do-file
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