用stata做heckman两阶段模型回归,结果是这个,但是不明白结果各项的含义,只大概知道系数,标准差之类的,请问谁用过这个?能否帮我解读一下,万分感谢
Heckman selection model -- two-step estimates Number of obs = 408
(regression model with sample selection) Censored obs = 191
Uncensored obs = 217
Wald chi2(7) = 206.90
Prob > chi2 = 0.0000
------------------------------------------------------------------------------
lnXij | Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
lnXij |
lnyi | 2.96132 .428554 6.91 0.000 2.121369 3.80127
lnyj | 3.911804 .5071289 7.71 0.000 2.91785 4.905759
lnPOi | 1.220811 .2040595 5.98 0.000 .8208614 1.62076
lnPOj | .9593004 .1268614 7.56 0.000 .7106567 1.207944
lndij | -1.459374 .4202767 -3.47 0.001 -2.283101 -.6356464
lnCPIi | 31.87076 8.983367 3.55 0.000 14.26368 49.47783
lnCPIj | 14.58603 10.71241 1.36 0.173 -6.409916 35.58197
_cons | -297.3729 74.25122 -4.00 0.000 -442.9026 -151.8432
-------------+----------------------------------------------------------------
select |
lnyi | .9149918 .1190752 7.68 0.000 .6816086 1.148375
lnyj | .9151349 .1469068 6.23 0.000 .6272028 1.203067
lnPOi | .3470399 .0587688 5.91 0.000 .2318551 .4622247
lnPOj | .0897556 .0557221 1.61 0.107 -.0194578 .198969
lndij | -.7140847 .2112232 -3.38 0.001 -1.128075 -.3000948
lnCPIi | 3.587759 2.86577 1.25 0.211 -2.029047 9.204566
lnCPIj | 15.12417 3.502059 4.32 0.000 8.260266 21.98808
language | -.683232 .2016387 -3.39 0.001 -1.078437 -.2880275
barrier | -1.364205 .7152758 -1.91 0.056 -2.766119 .03771
FTA | -.414249 .4039561 -1.03 0.305 -1.205988 .3774904
_cons | -105.963 24.22932 -4.37 0.000 -153.4516 -58.47439
-------------+----------------------------------------------------------------
mills |
lambda | 2.827092 .8948183 3.16 0.002 1.073281 4.580904
-------------+----------------------------------------------------------------
rho | 0.95637
sigma | 2.9560514
------------------------------------------------------------------------------
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