Abstract
Purpose: The present study aimed to explore the impact of nationality, team, tenure, frequency of switching teams, and the interaction effects on batters' efficiency on regular season for Chinese Professional Baseball League (CPBL) during 1990-2010. Methods: A two-staged data envelopment analysis (DEA) with the output-oriented assumption was used to assess batters' efficiency in the first stage. To diminish the biases generated from a two-staged estimation, a truncated regression with 2000 bootstrapped procedure (Simar & Wilson, 2007) was employed to evaluate the contributions of independent variables and the interaction effects on batters' efficiency. Results: The results indicated that after the effect of teams was controlled, there were positive main effects of nationality and tenure in CPBL on batters' efficiency, but a negative effect of the frequency of team switching in CPBL on batters' efficiency. The interaction of nationality and tenure in CPBL was significantly impacted batters' efficiency. Conclusion: The efficiency of foreign batters was higher than that of domestic batters. In addition, the tenure in CPBL would benefit batter's efficiency. On the contrary, frequency of team switching in CPBL would be harmful to batter's efficiency. Notably, the relationship between the tenure in CPBL and efficiency to regular season would be positive among foreign batters, whereas it would be negative among domestic batters.
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