reduce effort in order to cope with heat. We investigate how temperature affects performance of male professional tennis …. We find that performance significantly decreases with ambient temperature. The magnitude of the temperature effect is age … players do. The effect of temperature on performance is smaller when there is more at stake. Our findings also suggest that …

teams and run for an hour. This allows us not only to study the individual relationship between age and performance but also … performance goes down with age, although the speed-age gradient is rather flat. Group performance goes down with age as well, but … interestingly a counterbalancing force emerges, namely team dynamics that are driven by performance of runners who enter and leave. …

hours to 40 hours. We study how this mandatory working hours reduction affected employment and earnings of workers involved … monthly earnings approximately constant. We also find that the working hours reduction did not lead to an increased job loss …