Economic theory has many predictions regarding how workers should be paid and how workplaces should be organized. However, economists’ attempts to test these in the real world have been hampered by a lack of consistent information about workers’ productivity levels. Professional sports offer...

A detailed longitudinal dataset is assembled containing annual performance and biographical data for every player over the entire history of professional major league baseball. The data are then aggregated to the team level for the period 1920-2009 in order to test whether teams built on a more...

Can the existence of positive productivity spillovers between co-workers be explained by the presence of complementarities in a firm's production function? A simple model demonstrates that this is possible when workers perform their tasks sequentially and part of individuals' pay is determined...