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We use the U.S. Major League Baseball team level data in 1985-2015 and find an inverse U-shaped relationship between team payrolls and winning percentages. Furthermore, when investigating the winning effects of pitcher and hitter payrolls, we find the similar curvilinear relationship between pitcher/hitter salaries and team performance.

Team payroll, pitcher and hitter payrolls and team performance: Evidence from the U.S. Major League Baseball