nep-spo New Economics Papers
on Sports and Economics
Issue of 2005‒10‒15
two papers chosen by
Joao Carlos Correia Leitao
Universidade da Beira Interior

  1. Estimated Age Effects in Baseball By Ray C. Fair

  1. By: Ray C. Fair (Cowles Foundation, Yale University)
    Abstract: Age effects in baseball are estimated in this paper using a nonlinear fixed-effects regression. The sample consists of all players who have played 10 or more "full-time" years in the major leagues between 1921 and 2004. Quadratic improvement is assumed up to a peak-performance age, which is estimated, and then quadratic decline after that, where the two quadratics need not be the same. Each player has his own constant term. The results show that aging effects are larger for pitchers than for batters and larger for baseball than for track and field, running, and swimming events and for chess. There is some evidence that decline rates in baseball have decreased slightly in the more recent period, but they are still generally larger than those for the other events. There are 18 batters out of the sample of 441 whose performances in the second half of their careers noticeably exceed what the model predicts they should have been. All but 3 of these players played from 1990 on. The estimates from the fixed-effects regressions can also be used to rank players. This ranking differs from the ranking using lifetime averages because it adjusts for the different ages at which players played. It is in effect an age-adjusted ranking.
    Keywords: Aging, Baseball performance
    JEL: C2 J00
    Date: 2005–10
  2. By: Loek Groot (Utrecht School of Economics, Dept. of Public Economics)
    Abstract: SOMMARIO: Introduzione. - 1. Misurare l'equilibrio competitivo del calcio europeo - 2. Il mercato per i diritti di trasmissione televisiva del calcio - 2.1 Il lato dell'offerta - 2.2 il lato della domanda - 2.3 Policy implications - 3. Conclusioni
    Keywords: Calcio l'equilibrio competitivo
    JEL: D42 D60 L41 L83
    Date: 2005–10–13

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