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Conditional Distributionally Robust Functionals

Published: 29 June 2023 Publication History

Abstract

This paper addresses decision making in multiple stages, where prior information is available and where consecutive and successive decisions are made. Risk measures assess the random outcome by taking various candidate probability measures into account. To justify decisions in multiple stages, it is essential to have conditional risk measures available, which respect the information, which was already revealed in the past. The paper addresses different variants of risk measures, discusses their properties in the specific context and their implications in multistage decision making. Various examples of risk measures on simple probability spaces with finite support illustrate the content. The Wasserstein and nested distance are involved to make decision making with numerous scenarios numerically tractalbe.

Abstract

Many decisions, in particular decisions in a managerial context, are subject to uncertainty. Risk measures cope with uncertainty by involving more than one candidate probability. The corresponding risk averse decision takes all potential candidate probabilities into account and is robust with respect to all potential probabilities. This paper considers conditional robust decision making, where decisions are subject to additional prior knowledge or information. The literature discusses various definitions to characterize the corresponding conditional risk measure, which determines further the decision. The aim of this paper is to compare two different approaches for the construction of conditional functionals used in multistage distributionally robust optimization. As an application, we discuss conditional counterparts of a distance between probability measures.
Funding: A. Shapiro was partly supported by the Air Force Office of Scientific Research [Grant FA9550-22-1-0244]. A. Pichler was funded by the Deutsche Forschungsgemeinschaft [Project 416228727–SFB 1410].

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Published In

cover image Operations Research
Operations Research  Volume 72, Issue 6
November-December 2024
519 pages
DOI:10.1287/opre.2024.72.issue-6
Issue’s Table of Contents
This work is licensed under a Creative Commons Attribution 4.0 International License. You are free to copy, distribute, transmit and adapt this work, but you must attribute this work as “Operations Research. Copyright © 2023 The Author(s). https://doi.org/10.1287/opre.2023.2470, used under a Creative Commons Attribution License: https://creativecommons.org/licenses/by/4.0/.”

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INFORMS

Linthicum, MD, United States

Publication History

Published: 29 June 2023
Accepted: 16 March 2023
Received: 21 May 2022

Author Tag

  1. Optimization

Author Tags

  1. distributional robustness
  2. conditional risk measures
  3. strict monotonicity
  4. Wasserstein distance
  5. rectangularity

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