Summary: A decade ago, Philip Morris commissioned a study that found smokers in the Czech Republic were actually saving society money. A big part of the savings: Smoking tends to kill people while they're still young, saving society the long-term costs of caring for them as they get older. Perhaps not surprisingly, this finding blew up in the company's face. On today's Planet Money, we tell the story of the study. And we look more broadly at the economics of this stuff.
