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xiexie

能教我一下步骤吗？没有用过

search xttest,all

that is okay!

我查过了，结果是这些
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[XT]    xtreg postestimation  . . . . . . . . . Postestimation tools for xtreg
        (help xtreg postestimation)

STB-61  sg164 . . . . . . . . Specification tests for linear panel data models
        (help xttest1 if installed) . . . . .  W. Sosa-Escudero and A. K. Bera
        5/01    pp.18--21; STB Reprints Vol 10, pp.307--311
        extension of xttest0 that computes seven specification tests
        for balanced error component models
这说明这些命令还没有编写出来

sg164就是部分xttest命令