Just finished reading the linked article and made me think about work peers and wonder how these researchers would go about distinguishing between the fattening I've witnessed of co-workers who are usually hired at random and then start associating with fats socially or fall into the peer pressure coworker fats put on them to overeat with them even at work...could that be classified as "contagion" or "homophilly" within psycho-sociological paramenters?  hmmm