buyer information - seller often knows more about good than buyer    

medical insurance - insurance companies need to cover their losses  

• patients know more about their health than company
• patients with worse health buy insurance >> insurance costs rise >> patients w/ better health no longer buy insurance >> health companies screwed
  • in response, insurance companies offer insurance at companies, to include healthy/unhealthy patients
  • a sort of bundling w/ the job
• moral hazard - those w/ insurance more susceptible to doing risky things