scholarly journals Reinsurance of multiple risks with generic dependence structures

Author(s):  
M. Guerra ◽  
A.B. de Moura
2021 ◽  
pp. 1-17
Author(s):  
Apostolos Serletis ◽  
Libo Xu

Abstract This paper examines correlation and dependence structures between money and the level of economic activity in the USA in the context of a Markov-switching copula vector error correction model. We use the error correction model to focus on the short-run dynamics between money and output while accounting for their long-run equilibrium relationship. We use the Markov regime-switching model to account for instabilities in the relationship between money and output, and also consider different copula models with different dependence structures to investigate (upper and lower) tail dependence.


2018 ◽  
Vol 6 (1) ◽  
pp. 259-287 ◽  
Author(s):  
Jonathan Ansari ◽  
Ludger Rüschendorf

AbstractConditionally comonotonic risk vectors have been proved in [4] to yield worst case dependence structures maximizing the risk of the portfolio sum in partially specified risk factor models. In this paper we investigate the question how risk bounds depend on the specification of the pairwise copulas of the risk components Xiwith the systemic risk factor. As basic toolwe introduce a new ordering based on sign changes of the derivatives of copulas. This together with discretization by n-grids and the theory of supermodular transfers allows us to derive concrete ordering criteria for the maximal risks.


2019 ◽  
Vol 19 (8) ◽  
pp. 2667-2682 ◽  
Author(s):  
Chandni Singh ◽  
Mark Tebboth ◽  
Dian Spear ◽  
Prince Ansah ◽  
Adelina Mensah

AbstractPeople in developing countries face multiple risks, and their response decisions sit at the complex and often opaque interface of climatic stressors, constrained resource access, and changing livelihoods, social structures, and personal aspirations. Many risk management studies use a well-established toolkit of methodologies—household surveys, focus group discussions, and semi-structured interviews. We argue that such methodological conservatism tends to neglect the dynamic and differentiated nature of livelihood decisions. Since different methodologies privilege different portrayals of risk and response, we highlight how plural methodological approaches can capture a broader range of perspectives and problematisations. In this paper, we draw on life history (LH) interviews across four countries (Kenya, Namibia, Ghana, and India) to offer one way of expanding current methodological approaches on vulnerability and adaptation. We argue that LHs offer four key ‘value additions’. First, LHs give insights into the multiple and interacting nature of drivers of response behaviour. Second, they highlight intra-household dynamics to demonstrate how people with differential power shape risk management decisions. Third, LHs support explorations of past decisions, present situations, and future aspirations, thus producing temporally nuanced enquiries. Fourth, they provide a powerful analytical lens to capture the interplay of motivations, aspirations, and values on livelihood choices and adaptation outcomes. By adding value in these four ways, LHs challenge assumptions about how and why people respond to multiple risks and offer a nuanced understanding of adaptation processes.


2009 ◽  
Vol 14 (1) ◽  
pp. 48-52 ◽  
Author(s):  
Hugh Firth ◽  
Mairi Spanswick ◽  
Linda Rutherford

2012 ◽  
Vol 7 (1) ◽  
pp. 3-25 ◽  
Author(s):  
Michael Merz ◽  
Mario V. Wüthrich ◽  
Enkelejd Hashorva

AbstractA central issue in claims reserving is the modelling of appropriate dependence structures. Most classical models cannot cope with this task. We define a multivariate log-normal model that allows to model both, dependence between different sub-portfolios and dependence within sub-portfolios such as claims inflation. In this model we derive closed form solutions for claims reserves and the corresponding prediction uncertainty.


2010 ◽  
Vol 38 (3) ◽  
pp. 227-230
Author(s):  
Thomas Eichner ◽  
Andreas Wagener

Sexualities ◽  
2018 ◽  
Vol 22 (7-8) ◽  
pp. 1288-1308 ◽  
Author(s):  
Lynzi Armstrong

It is well documented that sex workers manage risks in their work – such as the potential for violence and the multiple risks associated with stigma. While sex workers are commonly understood to be a stigmatised population, few studies have considered in depth how stigma operates in different legislative contexts, how it relates to sex-worker safety, and how it may be reduced. Stigma is understood to be exacerbated by the criminalisation of sex work, which defines sex workers as deviant others and consequently renders them more vulnerable to violence. However, as full decriminalisation of sex work is still relatively rare, there has been little in-depth exploration into the relationship between this legislative approach, risks of violence, and stigma. Drawing on the findings of in-depth interviews with street-based sex workers and sex-worker rights advocates, in this article I explore the links between stigma and violence, and discuss the challenges of reducing stigma associated with sex work in New Zealand, post-decriminalisation. I argue that while decriminalisation has undoubtedly benefited sex workers in New Zealand, stigma continues to have a negative impact – particularly for street-based sex workers. Decriminalisation should therefore be considered an essential starting point. However, ongoing work must focus on countering stigmatising narratives, to enable a safer society for all sex workers.


2021 ◽  
Vol 14 (2) ◽  
pp. 62-70
Author(s):  
Huda Yaseen ◽  
Hafeth I. Naji

Construction projects are of a special nature affected by many factors, which makes them exposed to multiple risks that may lead to the abandonment of projects. Recently, the Iraqi construction sector is facing a number of problems. Abandoned construction projects are one of the most common and dangerous problems in the construction industry in Iraq, with their negative effects on stakeholders, the economy, and the environment due to the lack of sufficient financial and administrative capabilities to complete construction projects, which is reflected in exceeding the time limit for the completion of projects. The aim of this research is to use the analytic network process (ANP) technique to choose the best form of Public-Private Partnership (PPP) contracts to fund abandoned projects in Iraq. using a questionnaire survey to determine the most criteria and alternatives for selecting appropriate financing for the abandoned project. The results shown final weight of the Build-Own-Operate (BOO) contract from ANP is 0.533, which is the best form of PPP contract among the alternatives proposed to fund the project.


2020 ◽  
Author(s):  
Dilip Kumar ◽  
Rajib Kumar Bhattacharjya

Abstract. Assessment of vulnerability is the primary objective of flood hazard management. One of the most significant purposes of flood vulnerability appraisal is to make a precise relationship between the theoretical conceptions of flood vulnerability and the ground level management policies. A variety of approaches have been defined by many researchers to evaluate vulnerability. As such, the selection of the most suitable methodology is essential for policymakers to adequate mitigation policies. The purpose of the present study is to review all the vulnerability methods floating over the research universe and compare their benefits and drawbacks. This study evaluated more than 250 selected articles related to the assessment of vulnerability published between 1980 and 2020 to determine their competence in the estimation of flood vulnerability. The findings show that most of the research works are related to statistical methods, and the methods used to allocate weight to different indicators associate to the vulnerability. Moreover, most of the vulnerability assessment methods are centred around the single type of hazard, i.e., flood, drought, etc. As such, the results recommend the necessity for developing a new integrated vulnerability assessment framework applicable to worldwide considering multiple risks.


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