When the best players play together, the quality of each, and of the team as a whole, increases exponentially. When Ronaldinho and Messi, or Kaka and Shevchenko, play together, their combined “output” (number of goals) is greater than the sum of goals that each would score if he played in a different club with less talented co-players.
这一集中于顶端的原因是明显的，那就是最富有的俱乐部能够吸引全世界最佳的球员。但是，由于经济学家所称的“渐增的回报规模”，因此集中也无疑伴随着足球运动本身质量的提高。当最佳球员们同场竞技时，每人以及整个球队的水平也大为增长。当小罗纳尔多、梅西、卡卡和舍普琴科同场竞技时，其所产生的总体综合“产量”（进球数）要多于各个球员在不同的俱乐部与天赋略逊一筹的队友合作情况下所取得的单个进球数。