A pain clinic is a strange place to think about economics. Or is it?

When you're in pain and in need of treatment, it's hard to pay really close attention to your health care choices. Commentator Renee Lux describes how treating her stiff neck led to a huge hike in her insurance costs.

Researchers at Stanford University have invented a pain detector. They can now tell if someone is in pain using brain scans and that means they don…