The Rise and Fall of American Growth: The U.S. Standard of Living since the Civil War (The Princeton Economic History of the Western World Book 70)

by Robert J. Gordon

Many of the less capable enter two-year community colleges, which currently enroll 39 percent of American undergraduates, whereas the remaining 61 percent enroll in four-year colleges.

Not always "less capable"

recent study showed that between 1979 and 2009, the cumulative percentage of white male high school dropouts who had been in prison rose from 3.8 percent to 28.0 percent. For blacks over the same time interval, the percentage who had been in prison rose from 14.7 percent to 68.0 percent.

Overall, though the bottom-line forecast of a mere 0.3 percent growth rate in real disposable median income may seem startling, each step in this “exercise in subtraction” is well supported by our analysis of chapters 17 and 18

These four headwinds are sufficiently strong to leave virtually no room for growth over the next 25 years in median disposable real income per person.

The continuing stream of innovations spawned by America’s inventors is fueled by funding from America’s sophisticated and aggressive venture capital industry,

Sophisticated how?

Many high-income earners, particularly sports and entertainment stars, earn pure rents (the excess of their pay over the next best job they could obtain).

I don't think that's what "rents" means.