Bayesian policy support for adaptive strategies using computer models for complex physical systems

D Williamson and M Goldstein
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D Williamson: Durham University, Durham, UK
M Goldstein: Durham University, Durham, UK

Journal of the Operational Research Society, 2012, vol. 63, issue 8, 1021-1033

Abstract: In this paper, we discuss combining expert knowledge and computer simulators in order to provide decision support for policy makers managing complex physical systems. We allow future states of the complex system to be viewed after initial policy is made, and for those states to influence revision of policy. The potential for future observations and intervention impacts heavily on optimal policy for today and this is handled within our approach. We show how deriving policy dependent system uncertainty using computer models leads to an intractable backwards induction problem for the resulting decision tree. We introduce an algorithm for emulating an upper bound on our expected loss surface for all possible policies and discuss how this might be used in policy support. To illustrate our methodology, we look at choosing an optimal CO2 abatement strategy, combining an intermediate complexity climate model and an economic utility model with climate data.

Date: 2012
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