本研究旨在針對中華職棒外籍與本國籍野手之投入與產出績效進行分析比較，擷取2009至2010年中華職棒大聯盟球隊的野手薪資數據與技術表現，以月薪及打數為投入項；打點、壘打數、上壘率及打擊率為產出項，運用資料包絡分析法（NCN Model）評估外籍與本國籍野手球員之技術效率。研究結果如下：一、中華職棒中，有效率的外籍野手與本國籍野手比例接近，但本國籍野手整體薪資大約只占外籍野手的50%，薪資水準明顯偏低。二、外籍野手的薪資水準未能與其攻守表現相符，故，建議薪資下修幅度約為原月薪的48%～55%。就球團管理面，本研究提出兩點建議：一、在公平的原則下，各球團應逐漸拉近本國籍與外籍野手的薪資水準，甚或將過度投資於外籍球員的薪資比例，逐年轉投資在本國籍球員的培訓上，藉以激勵本國籍球員士氣。二、為能快速提升中華職棒各球隊戰力，球團應再拉高引進外籍球員的技能水平，重質不重量，招募至少是美國職棒2A水準的球員，為球隊帶入更好的技術參照水準，以利中華職棒的技術水準提升與球隊發展。

The purpose of this study was to compare the input and output performance of the foreign and domestic players of Chinese Professional Baseball League (CPBL). The CPBL fielders' technical performance and salary data from 2009 to 2010 were obtained. The monthly salary and at bats were the input items, while the run batted in, total bases, on base percentage, and batting average were the output items. Through the data envelopment analysis (NCN Model) the technical efficiencies of the foreign and domestic infielders were evaluated. The results show that: 1. the efficient foreign infielders' ratio was quite close as the domestic infielders', but the domestic infielders' overall salary only accounted for 50% that of the foreign infielders', which is significantly lower; 2. the salary paid by the team to the foreign infielders, to some extent, failed to reflect the players' offensive and defensive performance. In addition, the recommended down revision of the average salary accounted for 48% to 55% of the original monthly salary, thus indicating quite a high revision range. Hence, in terms of baseball organization management, suggestions in two aspects were put forth in this study: 1. under the principle of fairness, baseball organizations can gradually narrow the gap between the salary levels of foreign and domestic infielders. Or the over-investment in foreign players' salaries can be gradually turned into investment for training domestic players, so as to enhance the performance of local players and the pursuit of excellence on the part of the baseball organization; 2. in order to quickly lift every team's competitiveness, every team in the baseball organization should further increase the skill level of the imported foreign players, emphasize on quality instead of quantity when recruiting players who are at least 2A level in Major League Baseball (MLB), so as to provide better technical reference and standards for the teams and enhance the techniques and skills of the CPBL.