David Boyle is a fellow at the New Economics Foundation (nef). He played a leading role in the launch of time banks and is an author and journalist, with publications including Funny Money, The Tyranny of Numbers and Authenticity, The Little Money Book, The Money Changers, Blondel's Song and The Sum of our Discontent. Andrew Simms, author of Tescopoly, is policy director at nef and a commentator on issues like climate change and 'clone town Britain'. His other publications include Why Good Lives Needn't Cost the Earth and Ecological Debt.