We analyze the distribution of economic activity across space for different types of activity and different levels of … aggregation. Not only is this distribution highly uneven (independently of the type of activity and level of aggregation), it is … also remarkably regular regarding its size distribution (rank-size rule or Zipf’s Law) and regarding its interaction …

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 …