Abstract

High temperatures can have a negative effect on work-related activities. Labor productivity may go down because of negative effects on mental or physical health.Workers may experience difficulties to concentrate when it is hot or have to reduce effort in order to copy with heat. We investigate how temperature affects performance of male professional tennis players. We use data about outdoor singles matches from 2003 until 2021. Our identification strategy relies on the plausible exogeneity of short-term daily temperature variations in a given tournament from the average temperature over the same tournament. We find that performance significantly decreases with ambient temperature. The magnitude of the temperature effect is age-specific and skill-specific. Older and less-skilled players suffer more from high temperatures than younger and more skilled players do. The effect of temperature on performance is smaller when there is more at stake.