Giannetti, M., Liao, G., & Yu, X. (2015). The brain gain of corporate boards: Evidence from China. The Journal of Finance, 70(4), 1629-1682.

“No. of Business Segments: The number of industries in which a firm operates, set to one if the information is missing, and set to five if the number is larger than five. Since information on business segments is not available for 1999, we backfill using business segments in 2000. Source: WIND database.”

2007-2020面板数据
公司经营的行业数量，如果信息缺失则设为1，如果数量大于5则设为5。资料来源：WIND数据库。WIND数据库。
可用于经典论文复现。