Multivariate Sparse Clustering for Extremes
多元极值的稀疏聚类AI 解读 ↓
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AI 根据所提供的论文材料归类:摘要直接研究多元极端事件及尾部依赖,并应用于金融收益数据,对应金融尾部风险方向。
多元极值的稀疏聚类AI 解读 ↓
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Identifying directions where extreme events occur is a significant challenge in multivariate extreme value analysis. In this article, we use the concept of sparse regular variation introduced by Meyer and Wintenberger to infer the tail dependence of a random vector X. This approach relies on the Euclidean projection onto the simplex which better exhibits the sparsity structure of the tail of X than the standard methods. Our procedure based on a rigorous methodology aims at capturing clusters of extremal coordinates of X. It also includes the identification of the threshold above which the values taken by X are considered extreme. We provide an efficient and scalable algorithm called MUSCLE and apply it to numerical examples to highlight the relevance of our findings. Finally, we illustrate our approach with financial return data. Supplementary materials for this article are available online.
一般条件下极端事件因果效应的识别与推断
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算法交易策略的流动性审计
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宏观审慎政策的尾部传导:叙事识别证据
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关键矿产投资中的能源与碳排放溢出:动态连通性方法
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