The paper looks at how much money companies make from their stuff in the US. They found that companies made an average of 8.5% profit on their things from 1959 to 1996. Taxes took away about 54.1% of that profit. In the 1990s, taxes took away 42.1% of the profit. Companies made an average of 8.6% profit before taxes from 1990 to 1996, and 5.0% after taxes. In the mid-1990s, companies made more profit than in the past 20 years, but the profit changed a lot, so it's hard to say if it's a new trend.