黄老师,您好,论文中有些地方没看懂,给您添麻烦了,麻烦您方便的时候给讲讲。
摘要中:As a general approach,we develop the first-differenced GMM estimator, which allows both threshold variable and regressors to
be endogenous.
结论中说:In this paper we have explicitly addressed this challenging issue by developing the dynamic threshold panel data model, which allows both regressors and threshold effect to be endogenous.
In the special case where the threshold variable is strictly exogenous, we have also proposed more efficient FD-2SLS estimation.
这个意思是说门限变量和其他变量内生就可以选择FD GMM,如果门限变量严格外生,就需要选择FD 2SLS 模型吗?
谢谢黄老师,给您填麻烦了。