It's Self-Improvement Month at Freakonomics Radio. We begin with a topic that seems to be on everyone's mind: how to get more done in less time. First, however, a warning: there's a big difference between being busy and being productive.

Critics -- including President Obama -- say short-term, high-interest loans are predatory, trapping borrowers in a cycle of debt. But some economists see them as a useful financial instrument for people who need them. As the Consumer Financial Protection Bureau promotes new regulation, we ask: who's right?