Abstract
Axiomatically based risk measures have been the object of numerous studies and generalizations in recent years. In the literature we find two main schools: coherent risk measures (Artzner, Coherent Measures of Risk. Risk Management: Value at Risk and Beyond, 1998) and insurance risk measures (Wang, Insur Math Econ 21:173–183, 1997). In this note, we set to study yet another extension motivated by a third axiomatically based risk measure that has been recently introduced. In Heyde et al. (Working Paper, Columbia University, 2007), the concept of natural risk statistic is discussed as a data-based risk measure, i.e. as an axiomatic risk measure defined in the space \({\mathbb R^n}\) . One drawback of these kind of risk measures is their dependence on the space dimension n. In order to circumvent this issue, we propose a way to define a family {ρ n }n=1,2,... of natural risk statistics whose members are defined on \({\mathbb{R}^n}\) and related in an appropriate way. This construction requires the generalization of natural risk statistics to the space of infinite sequences l ∞.
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Assa, H., Morales, M. Risk measures on the space of infinite sequences. Math Finan Econ 2, 253–275 (2010). https://doi.org/10.1007/s11579-010-0023-0
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DOI: https://doi.org/10.1007/s11579-010-0023-0