Dependence concepts in multivariate Lévy processes revisited

来源 :International Workshop on High-Dimensional Dependence and Co | 被引量 : 0次 | 上传用户:XIAOZHOU914
下载到本地 , 更方便阅读
声明 : 本文档内容版权归属内容提供方 , 如果您对本文有版权争议 , 可与客服联系进行内容授权或下架
论文部分内容阅读
  Multivariate Lévy processes are tools suitable for modeling risk when jumps and sudden large values may occur.Since these processes are entirely specified by their distribution over one fixed time horizon,the most suggesting way of modeling their dependence is to choose a time horizon and to combine the marginal distributions of the process by a copula function.However,although this approach seems simple,it has a number of serious drawbacks.The copula has to be chosen such that the resulting multivariate distribution is infinitely divisible,which may be very complicated to ensure.Furthermore,the distribution of the process on other time horizons may become untractable if it is not stable under convolution.For these reasons,the concept of Lévy copulas,which does not suffer from the mentioned drawbacks,has been introduced.Unfortunately,the number of parametric Lévy copulas presented in the literature is rather small which limits their use in risk management applications.In this paper,we propose an alternative way of modeling dependence in multivariate Lévy processes which combines the advantages of both mentioned approaches.It bases on the idea of Lévy copulas,but uses common copula functions to ensure a rich variety of models.Furthermore,any marginal Lévy processes and any copula may be combined to a proper multivariate Lévy process.
其他文献
本文采用以异烟酸为主配体,通过加入第二配体和小分子酸等原料合成了一系列稀土单链和稀土-过渡金属的异核的配位聚合物。还采用了含有吡啶基的腈类配体,通过原位反应成功的
碳酸丙烯酯(PC)是一种性能优良的高沸点极性有机溶剂,广泛应用于电池、纺织、印染、柴油添加剂、气体分离等领域。PC也是一种重要的有机化工中间体,可用于生产碳酸二甲酯、聚碳
电化学氢通量法作为一种非侵入式监测技术,无需在管道表面开孔,克服了其它侵入式腐蚀监测方法所带来的管道现场开孔隐患。但是,当前的电化学氢通量法,往往都是通过监测金属内原子
氯代挥发性有机物(CVOCs)主要分为氯苯类、氯乙烯类和氯代烷烃三类,氯苯类以一氯苯(CB)为代表,氯乙烯类以三氯乙烯(TCE)为代表,二氯甲烷(DCM)和二氯乙烷(DCE)是氯代烷烃类的典型
  Loss reserving has always been an important facet of insurance company risk management especially as of late where solvency concern is receiving increasing
会议
攀鲈属(Anabas)属于鲈形目(Perciformes)攀鲈科(Anabantidae),在全球仅有2个种,中国仅龟壳攀鲈(Anabas testudineus)一种,是中国原生鱼类。龟壳攀鲈以顽强的生命力和能在陆地上
二氧化钛光催化剂作为催化剂成功的用于有机污染物的降解。它的优点在于高效、低成本和光稳定。为优化其使用性能,国内外广泛开展对催化剂改性及催化环境影响的研究。各种各