有人有 Hsiao, Cheng, H. Steve Ching, and Shui Ki Wan. 2012. “A Panel Data Approach for Program Evaluation: Measuring the Benefits of Political and Economic Integration of Hong Kong with Mainland China.” Journal of Applied Econometrics 27 (5): 705–40. doi:10.1002/jae.1230" 的 Stata 程序呢?