Optimal and Simple,Nearly Optimal Rules for Minimizing the Probability Of Financial Ruin in Retirement

Abstract

The increasing risk of poverty in retirement has been well documented; it is projected that current and future retirees’ living expenses will significantly exceed their savings and income. In this paper, we consider a retiree who does not have sufficient wealth and income to fund her future expenses, and we seek the asset allocation that minimizes the probability of financial ruin during her lifetime. Building on the work of Young (2004) and Milevsky, Moore, and Young (2006), under general mortality assumptions, we derive a variational inequality that governs the ruin probability and optimal asset allocation. We explore the qualitative properties of the ruin robability and optimal strategy, present a numerical method for their estimation, and examine their sensitivity to changes in model parameters for specific examples. We then present an easy-to-implement allocation rule and demonstrate via simulation that it yields nearly optimal ruin probability, even under discrete portfolio rebalancing.     

The implementation of special attributes of CEO compensation contracts around M&A transactions

This study investigates how the implementation of special attributes of CEO compensation contracts is determined by both the acquisition and the acquirer features for a set of M&A deals undertaken by Canadian acquiring firms. Our findings reveal that when agency problems are higher, manifested by larger control premiums and poor firm performance, boards of directors tend to implement stronger mechanisms of incentive alignment around M&A transactions. Relying on multiple interdisciplinary logics that are activated to explain directors' ability to effectively perform their monitoring function, we show that boards are reactive rather than proactive in dealing with agency problems. Data are further interpreted in light of the unique aspects of the Canadian institutional context. Based on asymmetric risk properties of two different groups of executive compensation modes examined in this study, testing the substitution effects between alternative governance mechanisms is proposed as an interesting avenue for future research. Copyright © 2009 John Wiley & Sons, Ltd.     

Case Studies Using Panel Data Models

Abstract

In this paper, we examine case studies from three different areas of insurance practice: health care, workers’ compensation, and group term life. These different case studies illustrate how the broad class of panel data models can be applied to different functional areas and to data that have different features. Panel data, also known as longitudinal data, models are regression-type models that have been developed extensively in the biological and economic sciences. The data features that we discuss include heteroscedasticity, random and fixed effect covariates, outliers, serial correlation, and limited dependent variable bias. We demonstrate the process of identifying these features using graphical and numerical diagnostic tools from standard statistical software.

Our motivation for examining these cases comes from credibility rate making, a technique for pricing certain types of health care, property and casualty, workers’ compensation, and group life coverages. It has been a part of actuarial practice since Mowbray’s (1914) fundamental contribution. In earlier work, we showed how many types of credibility models could be expressed as special cases of panel data models. This paper exploits this link by using tools developed in connection with panel data models for credibility rate-making purposes. In particular, special routines written for credibility rate-making purposes are not required.     

Measures of the effects of agricultural practices on ecosystem services

Agriculture produces more than just crops. Agricultural practices have environmental impacts that affect a wide range of ecosystem services, including water quality, pollination, nutrient cycling, soil retention, carbon sequestration, and biodiversity conservation. In turn, ecosystem services affect agricultural productivity. Understanding the contribution of various agricultural practices to the range of ecosystem services would help inform choices about the most beneficial agricultural practices. To accomplish this, however, we must overcome a big challenge in measuring the impact of alternative agricultural practices on ecosystem services and of ecosystem services on agricultural production. A framework is presented in which such indicators can be interpreted as well as the criteria for selection of indicators. The relationship between agricultural practices and land-use change and erosion impact on chemical use is also discussed. Together these ideas form the basis for identifying useful indicators for quantifying the costs and benefits of agricultural systems for the range of ecosystem services interrelated to agriculture.     

Equilibrium in Competitive Insurance Markets Under Adverse Selection and Yaari's Dual Theory of Risk

Under Yaari's dual theory of risk, we determine the equilibrium separating contracts for high and low risks in a competitive insurance market, in which risks are defined only by their expected losses, that is, a high risk is a risk that has a greater expected loss than a low risk. Also, we determine the pooling equilibrium contract when insurers are assumed non-myopic. Expected utility theory generally predicts that optimal insurance indemnity payments are nonlinear functions of the underlying loss due to the nonlinearity of agents' utility functions. Under Yaari's dual theory, we show that under mild technical conditions the indemnity payment is a piecewise linear function of the loss, a common property of insurance coverages.     

Wealth and Income Inequality in Europe

While it has long been apparent that global levels of wealth and income inequality have been steadily increasing since the 1970s, the issue received scant attention in Europe until the recent fi nancial crisis and the resulting Great Recession illuminated for the general public just how great the chasm between the very rich and everybody else had grown. This realisation was coupled with an increased focus on inequality among economists and other academics, leading to a fresh drive for policy ideas to remedy the alarming trend. This Forum comprises a diverse range of viewpoints on the recent history and dynamics of inequality within Europe, each striving to defi ne the root causes in the various countries being examined. The defi nition of these causes, of course, can inform the direction of policies aimed at alleviating the growing inequality in many European countries and thereby curtail one of the major political and social issues of our time.     

Using Student Generated Codes of Conduct in the Classroom to Reinforce Business Ethics Education

This paper presents four different contexts in which students practiced implementing business ethics. Students were required to develop Codes of Conduct/Codes of Ethics as a classroom exercise. By developing these codes, students can improve their understanding of how and why codes of conduct are developed, designed, and implemented in the workplace. Using the three-phase content analysis process (McCabe et al.: 1999, The Journal of Higher Education 70(2), 211–234), we identify a framework consisting of 10 classifications that can be used to assess learning outcomes in embedded ethics education. By analyzing the different content within each classification, instructors were able to gain a better understanding of differing application of ethical principles. This analysis indicates that there needs to be more research on codes of conduct for smaller units within an organization and more integration of work group codes of conduct into the business curriculum.     

Ex Post Moral Hazard and Bayesian Learning in Insurance

We study a dynamic insurance market with asymmetric information and ex post moral hazard. In our model, the insurance buyer's risk type is unknown to the insurer; moreover, the buyer has the option of not reporting losses. The insurer sets premia according to the buyer's experience rating, computed via Bayesian estimation based on buyer's history of reported claims. Accordingly, the buyer has strategic incentive to withhold information about losses. We construct an insurance market information equilibrium model and show that a variety of reporting strategies are possible. The results are illustrated with explicit computations in a two‐period risk‐neutral case study.     

Relational care in communication as the basis of nonprofit fundraising: Theorizing professional ethics based in stewardship and ethics of care

At its core, fundraising is relationship building. Therefore, ethical fundraising requires cultivating genuine, care-based relationships between various stakeholders by considering relational goals and communicative practices. We advance an ethics of care-oriented approach toward fundraising based in nurturing authentic relationships with multiple organizational stakeholders, including donors, employees, beneficiaries, and volunteers. Drawing upon ethics of care and stewardship scholarship based in public relations, the purpose of this article is to propose relational care in communication through dialogue as an ethical springboard of nonprofit fundraising.