The Effects of Equities on Team Performance for Winners and Losers in Nippon Professional Baseball: A Quantile Analysis

The paper introduces indices to measure the concepts of internal and employee equity in social psychology. The panel data of the Nippon Professional Baseball League for the period 1996-2008 and quantile regression are employed to examine the relationships between inequities induced by salary dispersions and team performance. The findings support that payroll has a positive effect on team performance, and it is stronger for winners and losers than average teams. Moreover, salary inequality based on employee equity for hitters has a significantly positive effect on team performance. The implication for team managers is that tournament-like compensation is suitable for hitters.