This study aimed to build a database on Korea's income security system based on the problem statement of the first study, Kang, Shin-Wook, et al. (2022), and focused on expanding the outreach of the database by extending the time series and systematizing the method and structure of the database. As a result, the number of detailed projects and characteristic variables (characteristic items) in the DB has been increased, and the relationship between items has been more systematized for easier comprehension and utilization of the database.
This study explored the possibility of building a database for in-kind support systems and tax expenditure systems beyond the scope of income security. If a database is built for in-kind support systems, it would be possible to utilize the same structure as the income security system database, but some items would need to be reorganized and new items would need to be created. Unlike the case of fiscal expenditure projects, tax expenditure projects have unspecified beneficiaries and support amounts determined retrospectively. Therefore, information on the number of beneficiaries and the per capita reduction amount must be provided. It is also necessary to unify the classification system between fiscal and tax expenditures.
Finally, In this study, we used information from the database to build simulated microdata to estimate the distribution of potential beneficiaries of key programs. Simulated micro-data are used to estimate the level of income security benefits that a particular group may receive.