原指令：xtabond2 z l.z lnscale MLF NPL, gmm (l.z) iv (lnscale MLF NPL) robust twostep small
结果报错：Favoring speed over space. To switch, type or click on mata: mata set matafavor space, perm.
点击mata没有反应
计量小白一枚，希望得到大神指点