The following postestimation commands for time series are available for
regress:
Command Description
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estat archlm test for ARCH effects in the residuals
estat bgodfrey Breusch-Godfrey test for higher-order serial
correlation
estat durbinalt Durbin's alternative test for serial correlation
estat dwatson Durbin-Watson d statistic to test for first-order
serial correlation
不知道VEC之后能否使用啊