Measuring the Experience-Productivity Relationship: The Case of Major League Baseball
利用面板数据估计了棒球运动员职业生涯中击球率随年龄变化的经验-生产率关系，并给出了巅峰年龄和变化速率。
This article develops and estimates a model of the typical major league baseball player's lifetime batting average profile. The batting average profile can be thought of as an experience-productivity relationship. The estimation techniques are those suggested by MaCurdy (1981 a, b) for estimating model parameters when using panel data, including the parameters of the error structure. The method could be used to estimate the relationship between experience and productivity in any situation where a measure of individual output is available. The results include estimates of the peak of a baseball player's career and the rate at which batting averages change with age.