It takes 270 Electoral College votes to win the presidency, and Berry and Bicker are projecting that Governor Mitt Romney will win 330 of the 538 votes up for grabs in November, while President Obama will receive just 208, down from the 213 they predicted in August.

It’s the economy. The model developed by the two professors has an uncanny track record, correctly predicting each presidential election since 1980, often with startling accuracy.