Stata学习：如何构建企业属于高科技行业变量？

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文献来源 A股 Chen, L., et al. (2023). ESG disclosure and technological innovation capabilities of the Chinese listed companies. Research in International Business and Finance. Wang, S. (2021). How does stock market liberalization influence corporate innovation? Evidence from Stock Connect scheme in China. Emerging Markets Review. 美股 The high-tech firms are defined as industries that are in computer hardware (SIC: 3571,3572, 3575, 3577, and 3578), communication equipment (SIC: 3661, 3663, and 3669), electronics (SIC:3671, 3672, 3674, 3675, 3677, 3678, and 3679), navigation (SIC: 3812), measuring (SIC: 3823, 3825, 3826, 3827, and 3829), medical (SIC: 3841 and 3845), telecommunications equipment (SIC: 4812, 4813), communication services (SIC: 4899), software (SIC: 7371, 7372, 7373, 7374, 7375, 7378, and 7379) (Banerjee et al., 2015). Banerjee, S., Humphery-Jenner, M., Nanda, V. (2015).Restraining Overconfident CEOs through Improved Governance: Evidence from the Sarbanes-Oxle ………………………………