Score contribution per author:
α: calibrated so average coauthorship-adjusted count equals average raw count
This paper presents a novel technique to measure motivation for working on a task using deviations from the money-maximising benchmark in a real-effort experiment. Although we find that average output increases in response to team incentives and observation, we also find that workers with high intrinsic motivation do not respond to team incentives. The reason is that highly motivated workers already work hard, and team incentives are not strong enough to overcome the high cost of additional effort.