‘Freakonomics’ podcast is taping live in Philly this week
Wharton prof Angela Duckworth, who wrote 'Grit' (no relation to Gritty), will co-host with Stephen J. Dubner.

Wharton prof Angela Duckworth, who wrote 'Grit' (no relation to Gritty), will co-host with Stephen J. Dubner.