http://www.pbs.org/newshour/bb/business-jan-june13-makingsense_06-21/ 
  
I'm curious about this, and would love to hear thoughts and opinions on the matter.  
  
It's *one* study, but it got quite a bit of media coverage. I'm especially interested in opinions from other researchers, and I am interested if there is research that reveals counter-evidence.  
  
EDIT: 
Original study found here: http://www.pnas.org/content/109/11/4086.full 
This guy is on some kind of "crusade" : https://socialecology.uci.edu/faculty/ppiff