看下面空间误差模型结果:
Pooled model with spatial errorautocorrelation and time period fixed effects
Dependent Variable = lny
R-squared = 0.4590
corr-squared = 0.3228
sigma^2 = 0.0906
log-likelihood = -23.689758
Nobs,Nvar,#FE = 105, 3, 8
# iterations = 17
min and max rho = -0.9900, 0.9900
total time in secs = 0.1400
time for optimiz = 0.0780
time for lndet = 0.0310
No lndet approximation used
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Variable Coefficient Asymptot t-stat z-probability
lnk 0.464343 7.255400 0.000000
lnkn -0.100227 -0.416166 0.677289
lnsd -0.022759 -1.392569 0.163750
spat.aut. 0.316962 2.112947 0.034605
最后一行,spat.aut 是什么意思?面板回归没有常数项吗?