 Well, one of the key questions in monetary policy is how do lower interest rates actually affect the overall economy? And our research is making the point that low interest rates may actually reduce productivity growth and economic growth through their effect on market power, that low interest rates disproportionately benefit market leaders, and as a result, market leaders gain more market share, and eventually firms that are going to try to take on the market leader may give up. And when they give up, you actually see lower productivity growth and lower economic growth. So our main contribution is to make the argument that perhaps lower interest rates may actually reduce economic growth. So I thought the most stimulating thing was listening to the actual policymakers describe for us academics what the biggest challenges they face are. And in particular, I find most interesting the political challenges that they face as they're trying to their best to try to revive the European economy and the world economy.