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Risk-Averse Bayes-Adaptive Reinforcement Learning
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In this work, we address risk-averse Bayes-adaptive reinforcement learning. We pose the problem of optimising the conditional value at risk (CVaR) of the total return in Bayes-adaptive Markov decision processes (MDPs). We show that a policy optimising CVaR in this setting is risk-averse to both the parametric uncertainty due to the prior distribution over MDPs, and the internal uncertainty due to the inherent stochasticity of MDPs. We reformulate the problem as a two-player stochastic game and propose an approximate algorithm based on Monte Carlo tree search and Bayesian optimisation. Our experiments demonstrate that our approach significantly outperforms baseline approaches for this problem.
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Combining Bayesian Inference and Reinforcement Learning for Agent Decision Making: A Review
A survey that organizes combinations of Bayesian inference and reinforcement learning, rates them on four properties, and raises ten open questions.
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