Host Ira Glass goes to a busy Target store one week before Christmas. Most shoppers he talks to don't think any of their gifts will be returned.

We conduct an experiment to test whether being nice actually pays by equipping two waitresses with hidden microphones to record their interactions. Each waitress is instructed to be super friendly with half of their tables while remaining aloof with the other half. We then compare the tips to see which approach was more profitable.

Katie Davis tells the story of one storefront in her bustling commercial neighborhood that resists all occupation. Over the decades, many businesses have tried to operate there, none have succeeded.