使用stata进行heckman两步法估计时,虚拟变量太多(1.7万个),报错。请问如何处理?报错信息如下:
no room to add more variables
Up to 5,000 variables are currently allowed, although you could reset the maximum using set maxvar; see help
memory.
r(900);
end of do-file
r(900);


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