Monotonicity results for portfolios with heterogeneous claims arrival processes

Esther Frostig, Michel Denuit

Research output: Contribution to journalArticlepeer-review


Loosely speaking, actuaries believe that the heterogeneity of the risks tends to increase dangerousness. This in turn leads to requiring more economic capital. This paper aims to formalize this intuitive idea. More specifically, vectors of compound sums will be considered, with different claim frequency distributions and/or different claim severity distributions. The effect of increasing the heterogeneity will be studied with the help of majorization. Various multivariate integral stochastic orderings will be used to compare situations according to their level of heterogeneity.

Original languageEnglish
Pages (from-to)484-494
Number of pages11
JournalInsurance: Mathematics and Economics
Issue number3
StatePublished - 15 Jun 2006

Bibliographical note

Funding Information:
Michel Denuit acknowledges the financial support of the C ommunauté française de Belgique under contract “Projet d’Actions de Recherche Concertées” ARC 04/09-320, as well as the financial support of the Banque Nationale de Belgique under grant “Risk measures and Economic capital”.


  • Majorization
  • Risk measures
  • Schur-increasingness
  • Univariate and multivariate stochastic orders

ASJC Scopus subject areas

  • Statistics and Probability
  • Economics and Econometrics
  • Statistics, Probability and Uncertainty


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