I rather like this habit of economists trying to put their own money on the line in making certain predictions. David Henderson has an item about it. It adds a certain frisson to the joustings between different camps. The most famous bet of all, of course, is the one between the late Julian L Simon and Paul Ehrlich. The latter lost his bet that the price of commodities would rise over a certain period (they did not) and he declined to accept another bet for another decade. Poor loser, I say.
I would have liked to have seen the odds back in 2008 that Obama would likely be only a one-term president, or that one, or possibly two, nations could be driven from the euro-zone by say, 2011/12.