Past studies estimating the marginal revenue products of baseball players have assumed individual players' hitting performances to be independent of teammate spillovers. However, the baseball community's widely held belief in "protection" - that a good (bad) player can improve (diminish) the hit...

A unique aspect of Major League Soccer (MLS) among professional sports leagues is that it operates with a single-entity ownership structure in which teams are managed by a group of co-investors rather than individual team owners in a joint venture. Revenue-sharing from a common pool raises the...