Scott Sumner of Bentley University and the blog The Money Illusion talks with EconTalk host Russ Roberts about the state of monetary policy, the actions of the Federal Reserve over the past two years and the state of the economy. Sumner argues that monetary policy has been too tight and helped create the crisis. He disputes the relevance of the so-called liquidity trap and argues that aggressive monetary policy is both possible and desirable. The conversation closes with a discussion of what we have learned and failed to learn during the crisis.