For baseball he developed, PECOTA, a system for predicting future performance of baseball players, and sold it to Baseball Prospectus in 2003.
From there he moved into politics and went on a run, correctly predicting the winner in 49 out of 50 states for the 2008 presidential election, and all 35 of the Senate races 다운로드.
That made him some enemies, specifically all those existing pollsters who were proved wrong time and time again.
They still don’t like him, but he is the reigning king of political predictions and now a blogger for the New York Times 나인룸 3회. Where he maintains a running forecast for the 2012 presidential election.
This screenshot shows the forecasted winner in November: