The “Superstar Effect”
http://www.nytimes.com/2010/12/26/business/26excerpt.html
From the above article:
“Nearly 30 years ago, Sherwin Rosen, an economist from the University of Chicago, proposed an elegant theory to explain the general pattern. In an article entitled “The Economics of Superstars,” he argued that technological changes would allow the best performers in a given field to serve a bigger market and thus reap a greater share of its revenue. But this would also reduce the spoils available to the less gifted in the business.”
Robert Shiller on the ““balanced-budget multiplier theorem””
http://www.nytimes.com/2010/12/26/business/26view.html