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Decision Making Under Multidimensional Risk

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  • Shaowei Ke
  • Mu Zhang

Abstract

Choice alternatives are often multidimensional and risky. We introduce and axiomatize the \textit{structured multidimensional expected utility} representation, a unified framework that generalizes existing approaches to evaluating such alternatives. The representation uses a \textit{rooted clustered tree} to organize the joint, separate, and conditional evaluation of risk across dimensions within a common structure. We analyze the uniqueness of the representation and characterize useful special cases. We apply the representation to inequality across individuals, groups, and generations and to multisource income, characterizing the implications of bracketing for stochastic dominance and the avoidance of multidimensional risk.

Suggested Citation

  • Shaowei Ke & Mu Zhang, 2026. "Decision Making Under Multidimensional Risk," Papers 2608.05043, arXiv.org.
    • Handle: RePEc:arx:papers:2608.05043
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    File URL: https://arxiv.org/pdf/2608.05043
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