If you’ve ever offered your child dessert in return for eating her vegetables — or some type of reward for doing her homework — you’ve encountered the power of incentives.

But incentives can generate unintended negative consequences as well. Duke University political science and philosophy professor Ruth Grant discusses the pros and cons of incentives in her 2011 book Strings Attached. She discussed key themes from the book during a presentation today to the John Locke Foundation’s Shaftesbury Society. In the video clip below, Grant explained that not all incentives are benign.

2:05 p.m. update: Click play below to watch the full 48:51 event.

You’ll find other John Locke Foundation video presentations here.