这个是运行的结果Heckman selection model -- two-step estimates Number of obs = 4029
(regression model with sample selection) Censored obs = 671
Uncensored obs = 3358
Wald chi2(20) = 647.38
Prob > chi2 = 0.0000
------------------------------------------------------------------------------
| Coef. Std. Err. z P>|z| [95% Conf. Interval]
-------------+----------------------------------------------------------------
lnwage |
d_dangpai | .0551013 .0341886 1.61 0.107 -.0119071 .1221096
jiaoyu | .0534553 .0072277 7.40 0.000 .0392893 .0676213
jingyan | .0387345 .0064442 6.01 0.000 .0261041 .0513649
jingyan2 | -.0005425 .0001646 -3.30 0.001 -.000865 -.0002199
d_zhongdian | .0836295 .0296437 2.82 0.005 .0255288 .1417301
d_daxuetuj~g | .1414707 .0444267 3.18 0.001 .054396 .2285453
d_chengji | .0985112 .0275511 3.58 0.000 .044512 .1525104
d_fuqinjia~u | .143543 .0679099 2.11 0.035 .010442 .2766441
d_muqinjia~u | -.011317 .0813858 -0.14 0.889 -.1708303 .1481962
liaoning | -.4195627 .0589744 -7.11 0.000 -.5351505 -.303975
jiangsu | -.1087803 .0592525 -1.84 0.066 -.224913 .0073525
guangdong | .3300027 .0581168 5.68 0.000 .2160959 .4439096
shanxi | -.3338697 .0683422 -4.89 0.000 -.4678179 -.1999215
anhui | -.2643499 .0705475 -3.75 0.000 -.4026205 -.1260792
henan | -.3509884 .062239 -5.64 0.000 -.4729745 -.2290022
hubei | -.2100775 .059456 -3.53 0.000 -.3266091 -.0935459
chongqing | -.2444448 .0746896 -3.27 0.001 -.3908338 -.0980558
sichuan | -.3066734 .0599305 -5.12 0.000 -.4241351 -.1892118
yunnan | -.0617573 .0600891 -1.03 0.304 -.1795297 .0560152
gansu | -.3936875 .0716767 -5.49 0.000 -.5341712 -.2532039
_cons | .4539413 .1164316 3.90 0.000 .2257395 .682143
-------------+----------------------------------------------------------------
canyu |
nianling | -.0328389 .0042105 -7.80 0.000 -.0410913 -.0245865
d_huzhu | .4895389 .0670846 7.30 0.000 .3580555 .6210223
d_dangpai | .7118165 .0958404 7.43 0.000 .5239727 .8996603
jiaoyu | .1322337 .0102141 12.95 0.000 .1122143 .152253
d_jiankang | .3156569 .1045783 3.02 0.003 .1106872 .5206266
qitarensho~u | -5.23e-06 2.67e-06 -1.95 0.051 -.0000105 1.70e-08
renkoushu | -.1058191 .0418114 -2.53 0.011 -.187768 -.0238702
liaoning | -.7001787 .1840809 -3.80 0.000 -1.060971 -.3393868
jiangsu | -.5816555 .185379 -3.14 0.002 -.9449917 -.2183192
guangdong | -.6677283 .1820279 -3.67 0.000 -1.024496 -.3109602
shanxi | -1.190784 .1819492 -6.54 0.000 -1.547398 -.8341699
anhui | -1.258417 .1844918 -6.82 0.000 -1.620014 -.8968192
henan | -.9159408 .1842843 -4.97 0.000 -1.277131 -.5547503
hubei | -.9591173 .1820656 -5.27 0.000 -1.315959 -.6022752
chongqing | -1.019455 .2034086 -5.01 0.000 -1.418128 -.6207814
sichuan | -.7063529 .1842589 -3.83 0.000 -1.067494 -.3452122
yunnan | -.5591356 .19506 -2.87 0.004 -.9414462 -.1768249
gansu | -1.031544 .1911088 -5.40 0.000 -1.40611 -.6569774
_cons | 1.734352 .3350926 5.18 0.000 1.077583 2.391121
-------------+----------------------------------------------------------------
mills |
lambda | -.409886 .1030592 -3.98 0.000 -.6118782 -.2078937
-------------+----------------------------------------------------------------
rho | -0.59090
sigma | .69366626
lambda | -.40988595 .1030592
------------------------------------------------------------------------------
. 我想问Wald chi2(20) = 647.38和 Prob > chi2 = 0.0000。者分别代表什么?是什么意思?
z 和 P>|z|还有 [95% Conf. Interval],都代表了什么?
最后mills lambda的数值大小代表什么?
问题有点多,也很初级,各位大神勿笑,小弟真心想学明白!
坐等各位大神给力答复!




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