Group 1 - The high-tech industry is defined as a collection of sectors that engage in research, production, and services using advanced scientific knowledge and innovative technologies [1] - The assessment criteria for high-tech industries include technology field classification, innovation capability indicators, economic characteristics and policy orientation, and comparisons of international and domestic standards [1] Group 2 - The data encompasses five classifications of high-tech industries, including stock codes, years, stock names, industry codes, and whether they are classified as high-tech across multiple criteria [2] - The dataset spans from 1990 to 2024, providing a comprehensive overview of companies' classifications in the high-tech sector [2]
上市公司是否为高科技行业数据+stata代码1990-2024年
Sou Hu Cai Jing·2025-10-30 01:40