KIHASA has released an additional five research monographs of 2023, including "A Study on Raising the Age Ceiling for Contributions to Strengthen Old-Age Income Security in National Pension," and "Current International Migration Trends and Policy Recommendations for Demographic Strategies in Korea." 

• 1.A Study on Raising the Age Ceiling for Contributions to Strengthen Old-Age Income Security in National Pension by Lee Dah Mi
  This study examines labour market conditions for the elderly in relation to raising the National Pension's age ceiling to strengthen old-age income security. It also analyses the policy perceptions and preferences of stakeholders, including employers and employees, as well as the potential income security effects and fiscal impacts of raising the age ceiling. The purpose is to provide a basis for a coherent proposal to extend the retirement age. The results indicate that raising the contribution age for the National Pension is not solely determined by institutional norms but is instead a crucial consideration for the elderly labour market and pension system. While raising the age ceiling can enhance old-age income security, it should be accompanied by policies to support vulnerable labour market groups, such as enhancing contribution support. The effectiveness of these measures varies across groups depending on individuals' work history and employment conditions after age 60.
  
  

• 2.Current Internal Migration Trends and Policy Recommendations for Demographic Strategies in Korea by Lee Sang-lim
  In order to systematically analyze the phenomenon of internal migration from a demographic perspective and identify its trends, this study constructs a comprehensive understanding of internal migration through the respective approaches of migration flows, migrants, and regions (origin & destination). The overall characteristics of internal migration are analyzed under seven themes. The main findings include the decline in total migration, the actual extent of population change in regions, the characteristics of migration in population crisis regions, confirmation of the cascading migration hypothesis, the gender dimension of rural youth outflows, the evolution of migration in population crisis regions, analysis of the characteristics of migrants moving in and out of population crisis regions, and the aggregate socio-economic impacts of migration on population crisis  regions. These findings emphasize that responses to regional population crises have to be based on a comprehensive understanding of population movements and the structure of inter-regional relations.
  
  

• 3.A Study on the Establishment of Income Security System Database: Extension and Systematization by Kang Shinwook
  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.
  
  

• 4.Women's Employment and Childbirth: Recent Trends and Insight from Previous Researchers by Choi Sunyoung
  Based on a literature review, this study examines how women's employment, childbearing, and the relationship between the two have changed. Since the mid-2010s, changes have been observed not only in the fertility rate, but also in the relationship between women's work and childbirth. We also reviewed studies on the impact of work-life balance support policies on female employment and fertility.
  
  

• 5.Demographic Monitoring Yearbook 2023 by Chang Insu
  This policy brief presents indicators related to the recent demographic changes that South Korean society is experiencing and provides a more in-depth interpretation of their implications. This study follows the framework of the 2022 Demographic Change Monitoring Yearbook pilot project and focuses on a more detailed calculation process and in-depth interpretation of the indicators. Our composition is largely attributable to the purpose of further enhancing the correlation between population change and policy responses.