2026-10-13T21:54:09Z https://www.scidb.cn/oai

10.57760/sciencedb.24185 2025-04-25T09:44:15Z

2025-04-25 New Quality Productivity —— trade and investment doi:10.57760/sciencedb.24185 en The quantitative data used for this foreign trade investment index mainly comes from the statistical yearbooks and announcements of each city and province, as well as the institutional innovation index of Zhongshan Free Trade Zone University. The final result of indexing is the sum weighted result obtained after data preprocessing. The main methods include data cleaning, integration, selection, transformation, and reduction. The methods used in this article include missing value supplementation method, normalization method, etc.  : China Pilot Free Trade Zone; New quality productivity; Foreign trade and investment Zhao Fuquan Wu Yanan PUBLIC https://creativecommons.org/licenses/by/4.0/ dataset Science Data Bank