AP Photo/Sergey Ponomarev

The Russian men's cycling team trains for the 2012 Summer Olympics, Monday, July 30, 2012, in London.

A formula created by a professor at the Tuck School of Business at Dartmouth predicts how many medals each country will win at the Olympics. Tuck graduate Emily Williams talked with Vermont Edition about what economics have to do with how a country will fair at the Olympics, and her predictions for London 2012.