Protectionist trade policies as a result of domestic political phenomena have been studied extensively in both theoretical and empirical economic studies. Although social scientists have made significant contributions based on these theoretical and empirical approaches, there has been relatively little focus on Southeast Asian and Oceanian countries. Motivated by this need for research on Southeast Asian and Oceanian cases, Kim (2023) examined voter protectionism in the Philippines, Thailand, Australia, and New Zealand. Based on survey data, which included observations from these four nations, Kim (2023) clarified that the factor endowment approach is supported by the empirical relationship between human capital (educational attainment) and each voter’s preferred level of trade barriers. Although each voter’s industry affiliation is not directly related to their preferred level of protection, Kim’s (2023) empirical analysis shows that industry affiliation is significantly correlated with the support for some of the political parties in four countries. Because many research questions that have already been answered in the context of North America and Europe still remain unanswered for the cases of Southeast Asia and Oceania, further research should be extensively conducted. In particular, the constituency-level estimation should examine whether the impact of trade on the local labor market was the determinant of recent regime changes in Southeast Asia and Oceania. As Southeast Asian and Oceanian nations become Korea's most important trading partners, deepening the focus on the endogenous trade policy formation in these key nations should be the main priority of Korean government research projects.