Americans with four-year college degrees made 98 percent more an hour on average in 2013 than people without a degree. That’s up from 89 percent five years earlier, 85 percent a decade earlier and 64 percent in the early 1980s. […] If there were more college graduates than the economy needed, the pay gap would shrink. The gap’s recent growth is especially notable because it has come after a rise in the number of college graduates, partly because many people went back to school during the Great Recession. That the pay gap has nonetheless continued growing means that we’re still not producing enough of them. — NYTimes.com.