The NYT had an interesting blog post on the increase in the number of jobs that require college degrees told readers that, "the wage gap between the typical college graduate and those who have completed no more than high school has been growing for the last few decades."

This is somewhat misleading, as shown in the charts in the source linked to in the piece. The premium for people with just a college degree, compared to those without a college degree, has been almost flat for two decades. Almost all of the increase in the gap during this period has been due to wage growth for those with advanced degrees.