Tyler Cowen thinks about pedigree bias in economics. Economics professors in top schools are very likely to have come from top schools themselves.
SCSU Scholars talks about innovation in health care. I've mentioned this before--technological advances in health care are unlike others. The equipment hasn't gotten smaller or cheaper. There seems to be different incentives at play than economists typically assume. More, given two procedures that give similar results, a doctor will often choose the more expensive procedure, since he can charge more for it. Consumers, meanwhile, don't know their options.