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A Multivariate Analysis of Korean Professional Players Salary

한국 프로스포츠 선수들의 연봉에 대한 다변량적 분석

Song, Jong-Woo
송종우

  • Published : 2008.06.30

Abstract

We analyzed Korean professional basketball and baseball players salary under the assumption that it depends on the personal records and contribution to the team in the previous year. We extensively used data visualization tools to check the relationship among the variables, to find outliers and to do model diagnostics. We used multiple linear regression and regression tree to fit the model and used cross-validation to find an optimal model. We check the relationship between variables carefully and chose a set of variables for the stepwise regression instead of using all variables. We found that points per game, number of assists, number of free throw successes, career are important variables for the basketball players. For the baseball pitchers, career, number of strike-outs per 9 innings, ERA, number of homeruns are important variables. For the baseball hitters, career, number of hits, FA are important variables.

Keywords

Professional sports;salary;multiple linear regression;regression tree;model Optimization

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