请问xtabond2为什么总是会出现错误 J(): 3900 unable to allocate real <tmp>[400938,63],
:1b: operator invalid
Favoring speed over space. To switch, type or click on mata: mata set matafavor space, perm.
J(): 3900 unable to allocate real <tmp>[400938,63]
_MakeGMMinsts(): - function returned error
xtabond2_mata(): - function returned error
<istmt>: - function returned error
r(3900);已经试了减少解释变量和工具变量,怎么都不行。


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