存在道德风险的医院等级选择与最优公共医疗保险合同

通过构造一个医疗服务系统的均衡模型,分析了医院等级、居民道德风险与最优公共医疗保险合同之间的关系。研究表明只存在公共医疗保险体系时,如果政府部门之间缺乏协调机制,各自为政,中国的公共医疗保险支付方式将不能实现社会最优并消除道德风险;公共医疗保险合同可能引起社会福利的损失或引致道德风险。政府应该完善医院评价系统,对不同医院的水平给予准确的评级,特别是要建立起政府各部门之间的协调机制;理顺医疗服务价格体系;鼓励更多市场参与主体进入医疗保险领域,建立合理的疾病风险分担机制。     

Valuing Mortgage Insurance Contracts in Emerging Market Economies

We develop a new option-based method for the valuation of mortgage insurance contracts in closed form in an economy where agents are risk neutral. While the proposed valuation method is general and can be used in any market, it may be particularly useful in emerging market economies where other existing methods may be either inappropriate or are too difficult to implement because of the lack of relevant data. As an application, we price a typical Serbian government-backed mortgage insurance contract.     

The Design of Optimal Insurance Contracts: A Topological Approach

This article deals with the optimal design of insurance contracts when the insurer faces administrative costs. If the literature provides many analyses of risk sharing with such costs, it is often assumed that these costs are linear. Furthermore, mathematical tools or initial conditions differ from one paper to another. We propose here a unified framework in which the problem is presented and solved as an infinite dimensional optimization program on a functional vector space equipped with an original norm. This general approach leads to the optimality of contracts lying on the frontier of the indemnity functions set. This frontier includes, in particular, contracts with a deductible, with total insurance and the null vector. Hence, we unify the existing results and point out some extensions.     

On Valuing Participating Life Insurance Contracts with Conditional Heteroscedasticity

In this paper, we consider a novel approach for the fair valuation of a participating life insurance policy when the dynamics of the reference portfolio underlying the policy are governed by an Asymmetric Power GARCH (APGARCH) model with innovations having a general parametric distribution. The APGARCH model provides a flexible way to incorporate the effect of conditional heteroscedasticity or time-varying conditional volatility and nests a number of important symmetric or asymmetric ARCH-type models in the literature. It also provides a flexible way to capture both the memory effect of the conditional volatility and the asymmetric effects of past positive and negative returns on the current conditional volatility, called the leverage effect. The key valuation tool here is the conditional Esscher transform of Bühlmann et al. (1996, 1998). The conditional Esscher transform provides a convenient and flexible way for the fair valuation under different specifications of the conditional heteroscedastic models. We illustrate the practical implementation of the model using the S&P 500 index as a proxy for the reference portfolio. We also conduct sensitivity analysis of the fair value of the policy with respect to the parameters in the APGARCH model to document the impacts of different conditional volatility models nested in the APGARCH model and the leverage effect on the fair value. The results of the analysis reveal that the memory effect of the conditional volatility has more significant impact on the fair value of the policy than the leverage effect.     

Optimal Insurance Design Under a Value-at-Risk Framework

This study designs an optimal insurance policy form endogenously, assuming the objective of the insured is to maximize expected final wealth under the Value-at-Risk (VaR) constraint. The optimal insurance policy can be replicated using three options, including a long call option with a small strike price, a short call option with a large strike price, and a short cash-or-nothing call option. Additionally, this study also calculates the optimal insurance levels for these models when we restrict the indemnity to be one of three common forms: a deductible policy, an upper-limit policy, or a policy with proportional coinsurance. JEL Classification No: G22     

Optimal proportional reinsurance from the point of view of cedent and reinsurer

In the reinsurance market, the cedent and the reinsurer make their subjective evaluations of the utility and riskiness of the financial operations covered by a treaty by deriving preference rankings of the different kinds of agreements. If both the cedent and the reinsurer evaluate the operation underlying the treaty by means of their utility functions and adopt the criterion based on the comparison between the expected utilities in order to take into account the subjective attitude toward risk, then the indifference prices play a crucial role because they define the preference thresholds of the exchange, thus restricting the range of variability of the reinsurance price. By using an analytical approach, this paper examines the above problem identifying the margins for achieving Pareto-optimal solutions in trading insurance risks.     

Full Insurance, Bayesian Updated Premiums, and Adverse Selection

In the classic Rothschild-Stiglitz model of adverse selection in a competitive environment, we analyse a no-claims bonus type contract (bonus-malus). We show that, under full insurance coverage, if the insurance company applies Bayes's rule to learn about client probability types over time and uses this information in premium calculations for contract renewals, then there exist conditions under which all client types strictly prefer the Bayesian updating contract to the classic Rothschild-Stiglitz separating equilibrium.     

Long-Term Care Insurance and Life Insurance Demand

This article investigates the interaction between life insurance and long-term care insurance markets on the demand side. In the model utility depends on both consumption and bequest, and utility from consumption is contingent on the state of health. While the demand for life insurance increases both with decreasing income and with a rising degree of altruism, the influences of these two parameters on the demand for long-term care insurance are ambiguous. If the utility shock arising from disability declines, both insurance demands will rise.     

新《保险法》中"保证保险"的风险及其防范

新《保险法》财产保险业务中新增加了保证保险,然而并没有对保证保险的定义、性质、适用范围及合同相关内容做明确规定。因此,正确认知保证保险与普通财产保险的区别,把握保证保险在我国实施过程中可能面临的各种风险具有积极意义。防范保证风险应从完善保证保险立法和监管制度、提高保险公司对保证保险的专业管理操作能力、创新相关产品、加强银保合作和信用环境建设等方面落实。     

Efficient Insurance Contracts under Epsilon-Contaminated Utilities

This paper analyses the qualitative properties of optimal contracts when agents have multiple priors and are uncertainty averse in an infinite state space framework. The case of the epsilon-contamination of a given prior, a basic tool in robustness theory is fully developped. It is shown that if both agents have strictly concave utility index, then if the insurer is less uncertainty averse than the insured, he provides a full insurance contract above a deductible for high values of the loss.     

相依风险下保险公司投资信息安全软件的最优决策分析

网络信息安全保险已经成为企业转移安全风险的最主要工具之一,为了探索保险公司主动参与风险防范对网络安全水平的影响,本文设计了网络信息安全保险公司对被保险企业安全软件投资的均等、最重要和按比例三种策略机制,研究在强相依和弱相依的信息安全风险下保险公司在简单情形和复杂情形中的不同投资决策机制,及其对系统效用和风险的影响。研究结果表明,在保险公司投资被保险企业安全软件的三种投资策略下,相比被保险企业不购买保险,被保险企业购买保险可以显著地提高期望效用,并且整个系统的网络安全水平逐渐提高,但是整个系统的期望收益随着保险公司投资额的增加而降低。此外,在简单情形中,保险公司在不同的投资策略下存在不同的最优投资决策,且在均等投资策略和弱相依风险下系统各主体效用和风险水平均最高;在复杂情形中,在弱相依风险和最重要投资策略下整个系统具有较高的期望和较低的风险水平,说明复杂情形的网络信息安全保险系统存在涓滴效应。     

互联网保险合规性问题研究

"互联网+保险"的科技融合孕育了互联网保险业务,而作为新兴事物,互联网保险的合规性问题一直是监管的难题。本文分析了我国互联网保险主客体界定与社会普遍认知撕裂、统一监管与碎片化运营方式相互排斥、合同生效要式与契约必要流程难以完备、信息数据集合高需求与网络安全强治理目标不一致、类保险衍生物创新与监管范围划定进退失据等五大合规性问题,并结合发达国家经验与我国实际,提出了对应的政策建议。     

保险法中转让问题研究

2009年2月28日,第十一届全国人民代表大会常务委员会第七次会议对保险法进行了修订,其中新增的关于保险合同随保险标的转让的规定引人瞩目。然而,何为保险标的转让,保险合同的转让是否需要被保险人和受让人达成协议,保险合同转让后保险人如何管理风险,保险合同转让能否替代保险金请求权转让等问题都需要进一步澄清。本文对此进行了探讨,并提出了自己的看法。     

强制责任保险与无过失保险可否兼容?——台湾的经验与大陆的教训

强制责任保险与无过失保险是机动车强制保险的两种模式,二者在保险原理、保障范围及运作机制等方面都有较大不同。与大多数强制责任保险立法不同,我国台湾地区《强制汽车责任保险法》在强制责任保险的框架内吸收了无过失保险的经验,规定了保险公司的无过失赔偿责任,并已被实践证明运行良好。然而,《道路交通安全法》第76条强制责任保险与无过失保险结合的规定却遭到了质疑。因此,有必要探讨强制责任保险与无过失保险的兼容性问题。     

农险市场中的保险公司道德风险研究

在过往十余年我国农业保险的跨越式发展中,保险公司的道德风险问题日益凸显。本文通过微观案例界定保险公司道德风险的内涵与类别,基于博弈视角分析其产生机理,结果发现:在政府和保险公司的委托代理关系中,由于二者的目标诉求不同,若政府对保险公司的农业保险业务不能给予有效监管,则保险公司不遵守经营规范所得收益要大于其遵守经营规范所得收益,从而导致保险公司出现违规经营业务的道德风险问题;相关部门可以通过完善监管政策、整合监管资源、优化协办机制、加大监管力度、设置差异化保险合约等措施来减少农业保险市场中保险公司的道德风险。     

Odd Pareto families of distributions for modeling loss payment data

A three-parameter generalization of the Pareto distribution is presented with density function having a flexible upper tail in modeling loss payment data. This generalized Pareto distribution will be referred to as the Odd Pareto distribution since it is derived by considering the distributions of the odds of the Pareto and inverse Pareto distributions. Basic properties of the Odd Pareto distribution (OP) are studied. Model parameters are estimated using both modified and regular maximum likelihood methods. Simulation studies are conducted to compare the OP with the exponentiated Pareto, Burr, and Kumaraswamy distributions using two different test statistics based on the ml method. Furthermore, two examples from the Norwegian fire insurance claims data-set are provided to illustrate the upper tail flexibility of the distribution. Extensions of the Odd Pareto distribution are also considered to improve the fitting of data.     

“问题导学法”在保险学教学中的运用

本文以问题教学法为依据,论述了在保险学本科专业教学中开展问题性课堂教学的现状及意义,笔者结合自己的教学实践,提出了在保险学课堂教学中运用提问、设问、疑问、留问为主体的问题导学法,该法以问题为中心,以学生为主体,以教师为引导,培养了学生的问题意识和自主学习意识。通过这种教学方法在保险课堂教学中的探索与实践,旨在提高保险专业学生的自主学习能力和创新能力,从而提高综合职业能力。     

Optimal Capital Utilization by Financial Firms: Evidence from the Property-Liability Insurance Industry

Capitalization levels in the property-liability insurance industry have increased dramatically in recent years—the capital-to-assets ratio rose from 25% in 1989 to 35% by 1999. This paper investigates the use of capital by insurers to provide evidence on whether the capital increase represents a legitimate response to changing market conditions or a true inefficiency that leads to performance penalties for insurers. We estimate best practice technical, cost, and revenue frontiers for a sample of insurers over the period 1993–1998, using data envelopment analysis, a non-parametric technique. The results indicate that most insurers significantly over-utilized equity capital during the sample period. Regression analysis provides evidence that capital over-utilization primarily represents an inefficiency for which insurers incur significant revenue penalties.     

Reforming Social Insurance in The Netherlands

This paper discusses recent reforms of social insurance in the Netherlands. It describes how a serious economic crisis in the beginning of the 1980s set the stage for the subsequent reform process. The most fundamental reforms were introduced in the areas of sickness insurance, which was privatized, and disability insurance, which now involves experience rating. After exploring various challenges affecting the future of social protection, the paper discusses various remaining policy options.     

The Effects of Setting Deposit Insurance Premiums to Target Insurance Fund Reserves

A common feature of many insurance systems is that they are backed by an insurance fund and insurance premiums are adjusted to target this fund's reserves. This study analyzes the fund targeting policy of the Federal Deposit Insurance Corporation (FDIC). It examines the distortions to banks' cost of deposit financing that result from setting premiums in this manner. The study's framework is a multiperiod, multibank contingent claims model where the stochastic rates of return on individual banks' assets are assumed to be correlated and match the actual empirical distribution of a sample of U.S. banks. The model identifies factors that are likely to exacerbate distortions due to insurance mispricing. The relative merits of a targeting policy and a flat-rate insurance policy are discussed, and the real effects of insurance mispricing are estimated. A method for valuing a government subsidy under a reserve targeting policy is also presented.