Migrant laborers subject to ROK's Employment Permit System(EPS) must strike a balance between host country's high wage and 'Depreciation of skill-relevance entailed by immigration', whilst taking account of the 'migration costs'. This study modelizes the optimization mechanism of migrant workers and the firms hiring them -- then induces the solution of the very model, namely, 'Subgame Perfect Nash Equilibrium(SPNE)', by utilizing game theory's 'backward induction' method. Analyzing the dynamics between variables at SPNE state, the attained stylized facts are what as follows; [1]Host nation's skill-relevance and wage differential have positive correlation. [2]Emigrating nation's skill-relevance and wage differential have negative correlation. Both stylized facts -- [1,2] -- are operationalized into 'Host nation skill-relevance hypothesis(H1)' and 'Emigrating nation skill-relevance hypothesis(H2)', respectively; of which are thoroughly tested by OLS linear regression analysis. In all sex/gender parameters(Total/Men/Women), test results support both hypotheses with statistical significance, thereby inductively substantiating the constructed model. This paper contributes to existing labor immigration literature in three following aspects: (1)Stimulate the economic approach to migrant labor analysis, and by such means, break away from the overflow of sociology, anthropology, political science, and jurisprudence in prior studies; (2)Shed a light on the EPS's microeconomic interaction process, of which was left undisclosed as a 'black box'; (3)Seek a complementary synthesis of two grand strands of research methodology -- that is, deductive modeling and inductive statistics.

翻译：受韩国雇佣许可制约束的外籍劳工需在"东道国高工资"与"移民导致的技能相关性贬值"之间寻求平衡，同时考虑迁移成本。本研究构建了外籍劳工及其雇佣企业的优化机制模型，并运用博弈论的逆向归纳法推导出该模型的解——子博弈完美纳什均衡。通过分析SPNE状态下各变量间的动态关系，得出以下典型事实：（1）东道国技能相关性与工资差异呈正相关；（2）母国技能相关性与工资差异呈负相关。上述两个典型事实分别操作化为"东道国技能相关性假说"与"母国技能相关性假说"，并通过OLS线性回归分析进行实证检验。在所有性别参数（总体/男性/女性）中，检验结果均以统计显著性支持两个假说，从而归纳验证了所构建的模型。本文在以下三个方面对现有劳工移民文献做出贡献：（1）激发劳工移民分析的经济学路径，突破既有研究以社会学、人类学、政治学及法学为主的局限；（2）揭示雇佣许可制中此前被视为"黑箱"的微观经济互动过程；（3）寻求演绎建模与归纳统计两大研究范式的方法论互补综合。