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Contribution Details

Type Journal Article
Scope Discipline-based scholarship
Title Group cohesion under individual regulatory constraints
Organization Unit
Authors
  • Delia Coculescu
  • Freddy DELBAEN
Item Subtype Original Work
Refereed Yes
Status Published in final form
Language
  • English
Journal Title Scandinavian Actuarial Journal
Publisher Taylor & Francis
Geographical Reach international
ISSN 0346-1238
Volume 2022
Number 1
Page Range 80 - 93
Date 2022
Abstract Text We consider a group consisting of N business units. We suppose there are regulatory constraints for each unit; more precisely, the net worth of each business unit is required to belong to a set of acceptable risks, assumed to be a convex cone. Because of these requirements, there are less incentives to operate under a group structure, as creating one single business unit, or altering the liability repartition among units, may allow to reduce the required capital. We analyse the possibilities for the group to benefit from a diversification effect and economise on the cost of capital. We define and study the risk measures that allow for any group to achieve the minimal capital, as if it were a single unit, without altering the liability of business units, and despite the individual admissibility constraints. We call these risk measures cohesive risk measures. In the commonotonic case, we show that they are tail expectations but calculated under a different probability.
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Digital Object Identifier 10.1080/03461238.2021.1934104
Other Identification Number merlin-id:21240
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