. xtabond2 DTFP L.DTFP L.sexdens L.(size age1 klratio fc),  ///
> gmm(L.DTFP) iv(L.sexdens L.(size age1 klratio fc)) twostep robust small  nomata
运行这个命令后，电脑就出现了如下的画面，没玩没了。
Building GMM instruments..
Estimating.
Computing Windmeijer finite-sample correction................................................................................................
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原以为一个小时能算完，没想到还在继续。
求高人指点一二。