Top-Heavy Assuntos Gerais MarkFord em 24/09/25 20:02 In any case, the winner-take-all shift has been accelerating in recent years. Take the percentage of total income at publicly traded U.S. corporations that is earned by the top 100 firms. This percentage grew to 52.8% from 48.5% between 1975 and 1995, according to research conducted by finance professors Kathleen Kahle of the University of Arizona and Rene Stulz of Ohio State. Over the subsequent 20 years, it mushroomed to 84.2%.