Peer enforcement in teams: evidence from high-skill professional workers with repeated interactions

Organizing employees into teams increases productivity but also generates incentives to shirk. Recent research suggests that peer enforcement plays an important role in deterring shirking in teams. We analyze 10 years of performance and compensation data for NFL offensive linemen, a high-skill, high-salary and repeatedly interacting team, using the Hausman-Taylor estimator to control for unobservable individual-specific heterogeneity. We find evidence that teammates’ effort signals reduce the salaries of individual offensive linemen, providing an optimal, low powered sanctioning mechanism for individual workers in this setting, and that a separate, independently monitored individual effort signal also reduces salaries.