Improved database of public-private partnerships from World Bank with imputed economic, institutional and conflict data.

The World Bank's database on private participation in infrastructure (PPI) projects provides detailed information on these initiatives. However, the original dataset includes imputed macro-level data for the countries that is outdated, lacks assigned ISO country codes, and is not linked to other standard country-level variables necessary for proper analysis and control by territory. In the improved version of the database, 10,958 project observations from 1900 to 2021 have been supplemented with ISO 2 and 3 country codes, enabling accurate integration with other databases. Additionally, 49 new variables related to economic, institutional, and conflict data are incorporated by country and year. This enhanced database ensures that researchers can retain critical World Bank information that might otherwise be lost in future updates, as it is not always preserved in repositories世界银行私人参与基础设施（Private Participation in Infrastructure, PPI）项目数据库收录了此类项目的详细信息。然而，原始数据集包含已过时的估算宏观国家级数据，未分配ISO国家代码，且未与其他用于规范分析与地域管控所需的标准国家级变量建立关联。该数据库的改进版本为1900年至2021年间的10958条项目观测数据新增了ISO 2位和3位国家代码，可实现与其他数据库的精准整合。此外，改进版还按国家与年份维度新增了49项涉及经济、制度与冲突相关的变量。此优化后的数据库可确保研究者留存那些在未来更新中可能丢失的核心世界银行信息，因为这类信息通常不会在各类数据存储库中得到保留。