Berg: IEM More Accurate Than Polls

The University of Iowa runs a financial-style exchange that lets ordinary Americans speculate on election results the way traders in New York speculate on future stock, oil or coffee prices. In 16 years the Iowa Electronic Markets have turned into a significant political barometer. Iowa professor JOYCE BERG says that, over time, it has proven to be three times more accurate than the opinion polls as a predictor of election results.

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