This study expands upon the foundation of 'Skill-Relevance-Self Selection' model on labor immigration, introduced by our previous study (Lee, Lim, & Cho, 2022). In detail, we seek an empirical confirmation of the model by providing evidence of the attained -- however, yet to be tested -- stylized fact: 'as the discount of intranational skill-relevance by immigration is intensified, the wage differential of international labor immigration is diminished'. Utilizing the hypothesis and data meticulously formulated and selected in consideration of Employment Permit System (EPS) and the typology of host nations, OLS linear regression results reasonably support all hypotheses with statistical significance, thereby inductively substantiating our constructed model. This paper contributes to existing labor immigration economics literature in three following aspects: (1) Acknowledge the previously overlooked factor of 'skill relevance discount' in labor immigration as an independent parameter, separate from the 'Moving cost' of Borjas model (1987; 1991); (2) Demonstrate the down-to-earth economic implications of host nation typology, thereby establishing a taxonomy in existence, rather than an ideal classification; (3) Seek a complementary synthesis of two grand strands of research methodology -- that is, deductive mathematical modeling and inductive statistical testing.

翻译：本研究扩展了我们前期研究（Lee, Lim, & Cho, 2022）提出的劳动力移民"技能相关性-自选择"模型。具体而言，我们通过验证一个已达成但尚未检验的典型化事实——即"随着移民导致的国家间技能相关性折扣加剧，国际劳动力移民的工资差异趋于缩小"——寻求对该模型的经验证实。利用基于就业许可制度（EPS）和东道国类型学精心构建的假设与数据，普通最小二乘（OLS）线性回归结果在统计显著性上合理支持了所有假设，从而归纳性地验证了所构建的模型。本文对现有劳动力移民经济学文献的贡献主要体现在以下三个方面：（1）将劳动力移民中此前被忽视的"技能相关性折扣"因素确认为独立参数，区别于Borjas模型（1987；1991）中的"迁移成本"；（2）展示了东道国类型学的现实经济含义，从而建立基于现实而非理想分类的类型学体系；（3）寻求两大研究方法论范式——即演绎数学建模与归纳统计检验——的互补性综合。