During a visit to the London School of Economics, the Queen famously asked why no one saw the 2008 financial crisis coming. Here, Professor Wouter Den Haan, a prestigious macroeconomist - co-director of the Centre for Macroeconomics and key figure within the LSE Department of Economics (Deputy Head of Department [Education])- discusses how macroeconomics has changed as a response to the crisis, and where he thinks it should have changed further. Interviewed by Tommy Sharpe.