Double Think económico

No blog Marginal Revolution:

4. I no longer understand Krugman's overall story. He notes that the New Deal years saw a good bit of recovery (I agree), he notes that fiscal policy was not very expansionary (I agree), he believes there was a liquidity trap (I don't agree), and he believes that positive supply shocks run up against a more or less vertical AD curve and thus don't help output (I don't agree). Given all of Krugman's views, AS doesn't much matter and AD didn't much expand. So what exactly drove the (partial) recovery of the 1930s?