. xtabond nim l(1).(tcr implicit liquid mgmt mgmt) dumt*,lags(1) noconstant robust
note: L.mgmt dropped from div() because of collinearity
note: dumt2 dropped from div() because of collinearity
note: L.mgmt dropped because of collinearity
Arellano-Bond dynamic panel-data estimation Number of obs = 80
Group variable: nbanks Number of groups = 12
Time variable: year
Obs per group: min = 5
avg = 6.666667
max = 7
Number of instruments = 39 Wald chi2(11) = 2065.31
Prob > chi2 = 0.0000
One-step results
Robust
nim Coef. Std. Err. z P>z [95% Conf. Interval]
nim
L1. .6515369 .1468371 4.44 0.000 .3637415 .9393322
tcr
L1. .0191107 .0066983 2.85 0.004 .0059822 .0322392
implicit
L1. -.3219975 .1873472 -1.72 0.086 -.6891913 .0451962
liquid
L1. -.0020698 .0056194 -0.37 0.713 -.0130835 .008944
mgmt
L1. .1869227 1.893393 0.10 0.921 -3.52406 3.897905
dumt2 -.0046204 .1688862 -0.03 0.978 -.3356313 .3263904
dumt3 -.1851123 .1621031 -1.14 0.253 -.5028286 .132604
dumt4 -.187402 .1474634 -1.27 0.204 -.4764249 .1016209
dumt5 -.1139194 .1339168 -0.85 0.395 -.3763914 .1485527
dumt6 .0723828 .0718932 1.01 0.314 -.0685253 .213291
dumt7 (dropped)
dumt8 .0918217 .0743874 1.23 0.217 -.0539748 .2376183
dumt9 .3583124 .0702931 5.10 0.000 .2205405 .4960843
Instruments for differenced equation
GMM-type: L(2/.).nim
Standard: LD.tcr LD.implicit LD.liquid LD.mgmt D.dumt3 D.dumt4 D.dumt5 D.dumt6 D.dumt7 D.dumt8 D.dumt9
1.为什么没有显示Arellano-Bond test 、Sargan test
2.有不少差分量极不显著,应该怎么处理?