- 常常看到有人问这个问题,请参考 http://faculty.haas.berkeley.edu/ross_levine/papers.htm 的 "Big Bad Banks: The Winners and Losers from Bank Deregulation in the United States." (with Thorsten Beck and Alexey Levkov) Journal of Finance, October 2010, 1637-1667. Lead Article.Data Appendix. Data. 有文章、Stata 程式与资料可以学习!
- 如何检定 parallel trend 假设:https://stats.stackexchange.com/questions/160359/difference-in-difference-method-how-to-test-for-assumption-of-common-trend-betw。