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GSI policy briefing note series

The GSI policy briefing note series publishes pieces intended for communicating relevant science to members of the non-academic, business and policy-making communities, on the topic of global and earth systems governance. In particular, the intention is to offer an open-access repository for peer-reviewed, accessible but rigorously scientific notes to promote the use of robust science in decision-making. Our main focus is on policy addressing issues in global and environmental systems, including climate change. Our aim is to facilitate communication within the science-policy interface, offering evidence bases for decision-making.


Deciding how to decide Risk-opportunity analysis as a generalisation of cost-benefit analysis

Simon Sharpe1*Jean-Francois Mercure2,3,4*Jorge Vinuales3Matthew Ives5,6Michael Grubb7Hector Pollitt3,4Florian Knobloch3Femke J. M. M. Nijsse2

Institute for Innovation and Public Purpose, UCL, UK

2 Global Systems Institute, University of Exeter, UK

Cambridge Centre for Energy, Environment and Natural Resources Governance,
University of Cambridge, UK

Cambridge Econometrics, Cambridge, UK

Institute for New Economic Thinking, Oxford Martin School, University of Oxford, Oxford, UK

6 Smith School of Enterprise and the Environment, University of Oxford, Oxford UK

Institute for Sustainable Resources, University College London, UK


* Correspondance to: and


Upward-scaling tipping cascades to meet climate goals - plausible grounds for hope

Simon Sharpe1,2* & Timothy M. Lenton3*

1Institute of Innovation and Public Purpose, University College London

2UK Government Cabinet Office COP26 Unit
3Global Systems Institute, University of Exeter, Exeter EX4 4QE

*Correspondence to: