What are some of the challenges and opportunities presented by measuring the performance of modern economies - particularly those of Britain's cities?

To address these questions, our host Andrew Carter is joined by Paul Swinney, Head of Policy and Research at Centre for Cities and Diane Coyle who is the inaugural Bennett Professor of Public Policy at the University of Cambridge, ONS Fellow on Measurement Issues in the Modern Economy and the author of several books, including 'GDP: A Brief but Affectionate History'.