Dimitri Zenghelis is Co-Head Policy at the Grantham Research Institute at the LSE. In 2014 he was Acting Chief Economist for the Global Commission on the Economy and Climate. He was recently Senior Economic Advisor to Cisco’s long term innovation group and an Associate Fellow at the Royal Institute of International Affairs, Chatham House. Previously, he headed the Stern Review Team at the Office of Climate Change, London, and was a senior economist on the Stern Review on the Economics of Climate Change, commissioned by the then Chancellor Gordon Brown. Before working on climate change, Dimitri was Head of Economic Forecasting at HM Treasury. He has provided regular briefings to the Chancellor Gordon Brown and Prime Minister Tony Blair. He has also worked at Oxford Economics, the Institute of International Finance, Washington DC, and Tokai Bank Europe, London.