Andrew Simms is an author, analyst and co-director of the New Weather Institute. He is a research associate with the Centre for Global Political Economy at the University of Sussex and Fellow at the New Economics Foundation. He also served as Policy Director for ten years, Communications Director, and established the Climate Change Programme for the foundation. He co-authored The Green New Deal and co-founded the Green New Deal Group, the climate campaign onehundredmonths.org  and cooperative think tank the New Weather Institute. He was a Principal Speaker of the Green Party.
A political economist and environmentalist, Simms studied at the London School of Economics for a masters degree in development and international political economy, and has written a number of reports on climate change, globalisation and localisation, development issues, debt (conventional and ecological debt), finance and banking, corporate accountability, genetic engineering and food security. He coined the term 'clone towns' to describe the economic and homogenising effects of chain retailers on town centres.
Simms advocates the notion of 'ecological debt' as an illustration of the degree to which economies operate beyond environmental thresholds, and initiated the annual marking of the day when the world is estimated to enter 'overshoot'.
Simms is the author of several books including:
- Ecological Debt: The Health of the Planet & the Wealth of Nations (2005, 2009) Pluto Press
- Tescopoly: How one shop came out on top and why it matters (2007)
- Do Good Lives Have to Cost the Earth? (co-author)(2008)
- The New Economics co-authored with David Boyle (2009) Routledge ISBN 978-1844076758
- Eminent Corporations: the Rise and Fall of the Great British Corporation (co-author)(2010)
- Cancel the Apocalypse: the New Path to Prosperity (2013) Little, Brown and Company
- Guardian: Andrew Simms
- Green New Deal group
- One hundred months
- New Economics Foundation biography
- communities supermarkets
- Simms, Andrew. "Ecological debt: No way back from bankrupt". BBC. Retrieved 17 February 2015.
- Earth overshoot day 2013
- Simms, Andrew; Boyle, David. "The New Economics A Bigger Picture". Routledge. Retrieved 21 June 2015.
- Home of the New Economics Foundation
- From World Power: Ecological Debt: The Health of the Planet & the Wealth of Nations
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