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• W2903735907 abstract "This paper generalizes results concerning strong convexity of two-stage mean-risk models with linear recourse to distortion risk measures. Introducing the concept of (restricted) partial strong convexity, we conduct an in-depth analysis of the expected excess functional with respect to the decision variable and the threshold parameter. These results allow to derive sufficient conditions for strong convexity of models building on the conditional value-at-risk due to its variational representation. Via Kusuoka representation these carry over to comonotonic and distortion risk measures, where we obtain verifiable conditions in terms of the distortion function. For stochastic optimisation models, we point out implications for quantitative stability with respect to perturbations of the underlying probability measure. Recent work in cite{Ba14} and cite{WaXi17} also gives testimony to the importance of strong convexity for the convergence rates of modern stochastic subgradient descent algorithms and in the setting of machine learning." @default.
• W2903735907 created "2018-12-22" @default.
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• W2903735907 date "2018-12-19" @default.
• W2903735907 modified "2023-09-27" @default.
• W2903735907 title "Strong Convexity for Risk-Averse Two-Stage Models with Fixed Complete Linear Recourse" @default.
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