How the crisis could change economic theory

Here's an interesting look at how our little housing bubble may change macroeconomic theory.

The crisis exposed the inadequacy of economists' traditional tool kit, forcing them to revisit questions many had long thought answered, such as how to tame disruptive boom-and-bust cycles. ...

"We could be looking at a paradigm shift," says Frederic Mishkin, a former Federal Reserve governor now at Columbia University.

That shift could change the way central bankers do their job, possibly leading them to wade more deeply into markets. They could, for example, place greater emphasis on the amount of borrowing in the economy, rather than just the interest rates at which borrowing is done. In boom times, that could lead them to restrict how much money various players, ranging from hedge funds to home buyers, can borrow.