MATLAB做空间计量的demoLMsarsem_panel代码结果中,sigma^2 = 0.0015意味什么
Ordinary Least-squares Estimates
Dependent Variable = logcit
R-squared = 0.4634
Rbar-squared = 0.4595
sigma^2 = 0.0015
Durbin-Watson = 1.8004
Nobs, Nvars = 276, 3


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