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老师您好,请问使用reghdfe命令时出现这样的错误是为什么呢?应该如何解决呢?
谢谢老师~
reghdfe l_price treat_post, absorb( city time )
(dropped 2 singleton observations)
FixedEffects::project_one_fe(): 3900 unable to allocate real <tmp>[157581907,2]
transform_sym_kaczmarz(): - function returned error
accelerate_cg(): - function returned error
FixedEffects::_partial_out(): - function returned error
FixedEffects::partial_out(): - function returned error
<istmt>: - function returned error
r(3900);
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