America has a huge part-time workforce problem.
And it's Worry Number One for Federal Reserve Chair Janet Yellen. She has talked about part-timers at each of her last three press conferences, at nearly every speech in the last six months and at both of her past two testimonies to Congress.
Yellen's worries stem from the fact that the part-time U.S. workforce is at "very high levels."
Excluding the Great Recession, the 6 million Americans who work part-time but want full-time jobs today are at the highest level in about 30 years or so.
