近年來各國職業棒球的球員全球化已蔚為一個趨勢，是否這些外籍球員的薪資與表現相稱，抑或存在國籍的薪資歧視或溢酬? 本文採用西元2000年至2017年日本職業棒球(NPB) 4469筆投手和4454筆野手，總共9023筆的球員資料，使用Pooled OLS和Panel data模型的隨機效果來進行分析，檢視外籍球員相較於本土球員而言，是否存在著薪資歧視(溢酬)的現象，接著進一步探討亞裔相較於非亞裔的球員，是否因為有著地利之便，薪資歧視(溢酬)的現象較為趨緩。
實證結果發現；在相同的個人特徵、表現能力和球隊特徵下，無論是使用合併模型抑或是隨機效果模型，在投手與野手的估計中，外籍球員的薪資都是顯著高於本土球員，顯示存在薪資溢酬的現象，支持贏者魔咒的假說；第二個部分則將外籍球員分成五個區域，分別為北美洲、中南美洲、歐洲、亞洲和其他區域，分析結果得出亞裔球員仍有薪資溢酬的現象，但其溢酬的幅度確實較低，支持本文論點: 亞洲球員相較非亞洲球員有地理上的相近，致使他們的價值能被球團更準確衡量。

In recent years, the globalization of professional baseball has induced the influx of foreign players in various countries. Do foreign players receive salaries which are commensurate with their performance or there is a wage discrimination (premium) for foreign players? This thesis adopts a player-level data, containing 4340 pitcher and 4539 field player observations, from Nippon Professional Baseball League for the period 2000-2017 to implement empirical estimations. Using both techniques of the pooled OLS and the Random-Effect of panel data model, I investigate whether there is salary discrimination (premium) for foreign players, compared to local players. Furthermore, I explore whether the phenomenon of wage discrimination (remuneration) is less likely to exist for Asian players due to the geographical proximity.

The empirical results show that foreign players, both pitchers and batters, are paid much higher than their local counterparts after controlling for performance, personal characteristics, and team characteristics, suggesting the existence of wage premium due to nationality. This result also supports the hypothesis of the winner curse. Furthermore, I classify foreign players into five groups based on their nationalities, consisting of North America, Central and South America, Europe, Asia, and others. The results indicate that the magnitude of salary premium of Asian players is indeed lower than those from North America, Central and South America, and Europe. This finding supports my conjecture that, Asian players are more accurately evaluated by teams due to the geographical proximity, thereby leading to a lower wage premium.

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