One way to determine who won the vice presidential debate, in a more or less objective way, is to consider how the free market responded to it. Tradesports.com allows traders to buy and sell shares of the presidential candidates. Though, I do not recommend people buy and sell on this market, especially if they are working or plan to work on a campaign, it is a pretty good indicator of which campaign has the momentum. Immediately after the debate on Tuesday, shares of George W. Bush stock fell from 62.6 to 57.4, while shares of John Kerry stock increased from 38.0 to 40.0. So, if you believe in the power of the free market, as Republicans so often claim they do, clearly John Edwards won this debate.