A productive workforce is a key objective of public economic policy. Recent empirical work suggests that increasing individual participation in sports and exercise can be a major force for achieving this goal. The productivity gains and related increase in earnings come on top of the already...

Concerns about poor student performance have led schools to diverge from traditional teacher compensation and base a portion of pay on student outcomes. In the US, the number of school districts adopting such performancebased financial incentives has increased by more than 40% since 2004....