I've pretty much stopped exhorting policy makers to engage in deficit-financed fiscal stimulus, not because we no longer need it -- we do -- but because it feels like a waste of time. With the fading of the Recovery Act along with state and local budget cuts, U.S. fiscal policy has turned contractionary. Yes, the economy is getting better, and pretty consistently at that. But it's still a slog, and gas prices are pushing the other way, among other factors. So I'm going to briefly drag the idea of stimulus out of hiding for two reasons. First, there's been a spate of research on the bang from fiscal stimulus in certain situations. And second, because Europe is providing such a sad, natural experiment of this forgotten thesis.