European Actuarial Journal最新文献_第9页

Optimal multidimensional reinsurance policies under a common shock dependency structure 共同冲击依赖结构下的最优多维再保险策略

IF 1.2

European Actuarial Journal Pub Date : 2022-03-22 DOI: 10.1007/s13385-022-00306-4

M. Azarbad, G. Parham, S. M. Alavi

引用次数: 0

The Protective Role of Hydrogen Sulfide and Its Impact on Gene Expression Profiling in Rat Model of COPD. 硫化氢的保护作用及其对慢性阻塞性肺病大鼠模型基因表达谱的影响

European Actuarial Journal Pub Date : 2022-03-18 eCollection Date: 2022-01-01 DOI: 10.1155/2022/9407927

Yanjing He, Yun Sun, Chengcheng Liao, Fan Lin, Zhengyuan Xia, Yongfen Qi, Yahong Chen

{"title":"The Protective Role of Hydrogen Sulfide and Its Impact on Gene Expression Profiling in Rat Model of COPD.","authors":"Yanjing He, Yun Sun, Chengcheng Liao, Fan Lin, Zhengyuan Xia, Yongfen Qi, Yahong Chen","doi":"10.1155/2022/9407927","DOIUrl":"10.1155/2022/9407927","url":null,"abstract":"Chronic obstructive pulmonary disease (COPD) is a leading cause of death worldwide, which is usually caused by exposure to noxious particles or gases. Hydrogen sulfide (H2S), as an endogenous gasotransmitter, is involved in the pathogenesis of COPD, but its role in COPD is little known. To investigate the role of H2S in COPD, a rat model of COPD was established by cigarette smoking (CS) and intratracheal instillation of lipopolysaccharide (LPS). Rats were randomly divided into 4 groups: control, CS + LPS, CS + LPS + sodium hydrosulfide (NaHS, H2S donor), and CS + LPS + propargylglycine (PPG, inhibitor of cystathionine-γ-lyase, and CTH). Lung function in vivo, histology analysis of lung sections, malondialdehyde (MDA) concentration, CTH protein, total superoxide dismutase (T-SOD), and catalase (CAT) activity in lung tissues were assessed. Gene expression profiling of lung was assessed by microarray analysis. The results showed that rats in the CS + LPS group had lower body weight and lung function but higher lung pathological scores, MDA concentration, CTH protein, T-SOD, and CAT activity compared with the control. Compared with CS + LPS group, NaHS treatment decreased lung pathological scores and MDA concentration, while PPG treatment decreased body weight of rats and T-SOD activity, and no significant differences were detected in pathological scores by PPG treatment. Microarray analysis identified multiple differentially expressed genes, and some genes regulated by H2S were involved in oxidative stress, apoptosis, and inflammation pathways. It indicates that H2S may play a protective role in COPD via antioxidative stress and antiapoptosis pathway.","PeriodicalId":44305,"journal":{"name":"European Actuarial Journal","volume":"2 1","pages":"9407927"},"PeriodicalIF":0.0,"publicationDate":"2022-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://www.ncbi.nlm.nih.gov/pmc/articles/PMC8956388/pdf/","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74444688","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the impact of outliers in loss reserving 论异常值对损失准备金的影响

IF 1.2

European Actuarial Journal Pub Date : 2022-03-01 DOI: 10.1007/s13385-023-00356-2

Benjamin Avanzi, Mark Lavender, G. Taylor, Bernard Wong

引用次数: 2

Derivation of biometrically dependent cash flows 生物计量依赖现金流的推导

IF 1.2

European Actuarial Journal Pub Date : 2022-02-18 DOI: 10.1007/s13385-021-00303-z

M. Schmitt

引用次数: 0

Premium rating without losses 无损失保费

IF 1.2

European Actuarial Journal Pub Date : 2022-01-24 DOI: 10.1007/s13385-021-00302-0

Michael Fackler

引用次数: 1

Efficient evaluation of alternative reinsurance strategies using control variates 利用控制变量对可选再保险策略进行有效评估

IF 1.2

European Actuarial Journal Pub Date : 2022-01-20 DOI: 10.1007/s13385-022-00304-6

Ioannis Kyriakou, Andreas Tsanakas

引用次数: 0

Extremes for a general contagion risk measure 一般传染风险度量的极值

IF 1.2

European Actuarial Journal Pub Date : 2022-01-10 DOI: 10.1007/s13385-021-00301-1

C. Ling, Jiajun Liu

引用次数: 0

Pricing participating longevity-linked life annuities: a Bayesian Model Ensemble approach. 定价参与寿命挂钩人寿年金:贝叶斯模型集成方法。

IF 1.2

European Actuarial Journal Pub Date : 2022-01-01 Epub Date: 2021-05-13 DOI: 10.1007/s13385-021-00279-w

Jorge Miguel Bravo

{"title":"Pricing participating longevity-linked life annuities: a Bayesian Model Ensemble approach.","authors":"Jorge Miguel Bravo","doi":"10.1007/s13385-021-00279-w","DOIUrl":"https://doi.org/10.1007/s13385-021-00279-w","url":null,"abstract":"Participating longevity-linked life annuities (PLLA) in which benefits are updated periodically based on the observed survival experience of a given underlying population and the performance of the investment portfolio are an alternative insurance product offering consumers individual longevity risk protection and the chance to profit from the upside potential of financial market developments. This paper builds on previous research on the design and pricing of PLLAs by considering a Bayesian Model Ensemble of single population generalised age-period-cohort stochastic mortality models in which individual forecasts are weighted by their posterior model probabilities. For the valuation, we adopt a longevity option decomposition approach with risk-neutral simulation and investigate the sensitivity of results to changes in the asset allocation by considering a more aggressive lifecycle strategy. We calibrate models using Taiwanese (mortality, yield curve and stock market) data from 1980 to 2019. The empirical results provide significant valuation and policy insights for the provision of a cost effective and efficient risk pooling mechanism that addresses the individual uncertainty of death, while providing appropriate retirement income and longevity protection.","PeriodicalId":44305,"journal":{"name":"European Actuarial Journal","volume":"12 1","pages":"125-159"},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s13385-021-00279-w","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"38993611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 18

The only constant is change: opportunities and challenges for actuaries in a changing world. 唯一不变的是变化:在不断变化的世界中，精算师面临的机遇和挑战。

IF 1.2

European Actuarial Journal Pub Date : 2022-01-01 Epub Date: 2022-10-10 DOI: 10.1007/s13385-022-00331-3

Frank Schiller, Jérôme Crugnola-Humbert

引用次数: 1

Dynamic surplus optimization with performance- and index-linked liabilities. 动态盈余优化与业绩和指数挂钩的负债。

IF 1.2

European Actuarial Journal Pub Date : 2022-01-01 Epub Date: 2021-08-24 DOI: 10.1007/s13385-021-00292-z

Sascha Desmettre, Markus Wahl, Rudi Zagst

{"title":"Dynamic surplus optimization with performance- and index-linked liabilities.","authors":"Sascha Desmettre, Markus Wahl, Rudi Zagst","doi":"10.1007/s13385-021-00292-z","DOIUrl":"https://doi.org/10.1007/s13385-021-00292-z","url":null,"abstract":"The increasing importance of liability-driven investment strategies and the shift towards retirement products with lower guarantees and more performance participation provide challenges for the development of portfolio optimization frameworks which cover these aspects. To this end, we establish a general and flexible terminal surplus optimization framework in continuous time, allowing for dynamic investment strategies and stochastic liabilities, which can be linked to the performance of an index or the asset portfolio of the insurance company. Besides optimality results in a fairly general surplus optimization setting, we obtain closed-form solutions for the optimal investment strategy for various specific liability models, which include the cases of index-linked and performance-linked liabilities and liabilities which are completely or only partially hedgeable. We compare the results in numerical examples and study the impact of the performance participation, unhedgeable risk components, different ways of modeling the liabilities and the relative risk aversion parameter. We find that performance- or index-linked liabilities, which provide a close link between the wealth of the insurance company and its liabilities, allow for a higher allocation in the risky investment. On the other hand, unhedgeable risks reduce the allocation in the risky investment. We conclude that, aiming at a high expected return for the policy holder, insurance companies should try to connect the performance of insurance products closely to the wealth and minimize unhedgeable risks.","PeriodicalId":44305,"journal":{"name":"European Actuarial Journal","volume":" ","pages":"607-645"},"PeriodicalIF":1.2,"publicationDate":"2022-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1007/s13385-021-00292-z","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"40710905","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0