498 research outputs found
Semi-groups and time operators for quantum unstable systems
We use spectral projections of time operator in the Liouville space for
simple quantum scattering systems in order to define a space of unstable
particle states evolving under a contractive semi-group. This space includes
purely exponentially decaying states that correspond to complex eigenvalues of
this semi-group. The construction provides a probabilistic interpretation of
the resonant states characterized in terms of the Hardy class
Directional complexity and entropy for lift mappings
We introduce and study the notion of a directional complexity and entropy for
maps of degree 1 on the circle. For piecewise affine Markov maps we use
symbolic dynamics to relate this complexity to the symbolic complexity. We
apply a combinatorial machinery to obtain exact formulas for the directional
entropy, to find the maximal directional entropy, and to show that it equals
the topological entropy of the map. Keywords: Rotation interval, Space-time
window, Directional complexity, Directional entropy;Comment: 19p. 3 fig, Discrete and Continuous Dynamical Systems-B (Vol. 20, No.
10) December 201
On Bivariate Risk Premia
This note examines the conditions under which the bivariate risk premium for one risk may be negative even if both risks are positively correlated, using a mean variance setting. The link between the bivariate risk premium and the partial bivariate risk premia is also investigate
Primes de risque et soins de santé
Dans ce travail, nous appliquons la notion de prime de risque à une situation pour laquelle l’individu est confronté à un risque de maladie qui peut engendrer un risque de richesse via le recours aux soins de santé. Suivant la nature des soins entrepris, différentes primes sont définies qui vérifient pour la plupart les propriétés usuelles des primes à la Arrow-Pratt. Enfin, la comparaison de ces primes nous renseigne sur les préférences individuelles en matière de soins de santé.In this work, the notion of risk premium is applied to a situation for which the individual is confronted with a risk of illness. This health risk can breed a risk of wealth via the recourse to health care. Following the nature of health care undertaken, different premiums are defined which verify the usual properties of the Arrow-Pratt risk premiums. Finally, the comparison of these premiums informs us of the individual preferences in terms of health care
Space-time directional Lyapunov exponents for cellular automata
Space-time directional Lyapunov exponents are introduced. They describe the
maximal velocity of propagation to the right or to the left of fronts of
perturbations in a frame moving with a given velocity. The continuity of these
exponents as function of the velocity and an inequality relating them to the
directional entropy is proved
Primes de risque et soins de santé
In this work, the notion of risk premium is applied to a situation for which the individual is confronted with a risk of illness. This health risk can breed a risk of wealth via the recourse to health care. Following the nature of health care undertaken, different premiums are defined which verify the usual properties of the Arrow-Pratt risk premiums. Finally, the comparison of these premiums informs us of the individual preferences in terms of health care. Dans ce travail, nous appliquons la notion de prime de risque à une situation pour laquelle l’individu est confronté à un risque de maladie qui peut engendrer un risque de richesse via le recours aux soins de santé. Suivant la nature des soins entrepris, différentes primes sont définies qui vérifient pour la plupart les propriétés usuelles des primes à la Arrow-Pratt. Enfin, la comparaison de ces primes nous renseigne sur les préférences individuelles en matière de soins de santé.
Longevity risks and capital markets: The 2010-2011 update
This Special Issue of Geneva Papers on Risk and Insurance - Issues and Practice contains 10 contributions to the academic literature all dealing with longevity risk and capital markets. Draft versions of the papers were presented at Longevity Six: The Sixth International Longevity Risk and Capital Markets Solutions Conference that was held in Sydney on 9-10 September 2010. It was hosted by the Australian Institute for Population Ageing Research, the Australian School of Business and the University of New South Wales. It was sponsored by PricewaterhouseCoopers, Australian Prudential Regulation Authority (APRA), Coventry Capital, Swiss Re, and Institute of Actuaries of Australia.Longevity Risk; Capital Market
On insurance and health risks
Health risk can be defined as the likelihood of a negative health consequence occurring
due to a specific event, disease or condition. Its consequences can be strongly
detrimental to individuals and society and managing health risks is a central concern for individuals and governments
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