求帮助啊

相关文献 https://drive.google.com/file/d/0B13ohL0_ULTDbXluajJVZnBTYk0/view 。

特别是 https://sites.google.com/site/stephanebonhommeresearch/ 的 Quantile Selection Models (with Manuel Arellano) Econometrica, 85(1), 1-28, January 2017.
Keywords: Quantile regression, sample selection, gender wage gap, copula.
Summary: We propose a method to correct quantile regression estimates for sample selection, and apply it to study wage and employment in the UK.
Supplementary appendix
Replication codes
Code of the quantile selection estimator (in matlab), to be used on any data set.

但似乎没有 Stata code.

嗯嗯 谢谢老师，我把文章看了看，有点难懂。我最近在做工资差异方面的分解，那我如果不考虑自选择的问题可以么。就是本来样本中是包含未就业的，我直接把未就业的剔除掉，是不是就可以不考虑自选择的问题。