求教大侠,以下是我用matlab做SLM模型计量的结果,请问logL值是否就是那个“NaN"的值?如果是的那为什么会这样?
Pooled model with spatially lagged dependent variable, spatial and time period fixed effects
Dependent Variable = y
R-squared = 0.8504
corr-squared = 0.4854
sigma^2 = 0.1130
Nobs,Nvar,#FE = 155, 7, 41
log-likelihood = NaN
# of iterations = 1
min and max rho = -1.0000, 1.0000
total time in secs = 0.0250
time for optimiz = 0.0060
time for lndet = 0.0100
time for t-stats = 0.0010
No lndet approximation used
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Variable Coefficient Asymptot t-stat z-probability
x1 0.428738 0.278092 0.780942
x2 -0.685447 -2.101475 0.035599
x3 4.047355 1.065698 0.286560
x4 -1.387638 -1.207144 0.227377
x5 6.405075 2.773594 0.005544
x6 0.951532 9.305283 0.000000
W*dep.var. -0.183058 -1.382462 0.166830