The Role of U.S. Market on International Risk‐Return Tradeoff Relations

We study the intertemporal risk‐return tradeoff relations based on returns from 18 international markets. We find striking new empirical evidence that the inclusion of U.S. market returns significantly changes the estimated risk‐return tradeoff relations in international markets from mostly negative to predominantly positive. Our results are consistent with the lead‐lag effect between U.S. and international markets in the sense of Rapach, Strauss and Zhou.     

The Performance of Islamic Vs. Conventional Banks: Evidence on the Suitability of the Basel Capital Ratios

This paper examines the effect of various types of bank capital on the profitability and efficiency of conventional and Islamic banks. Our results show that higher quality forms of capital improve the profitability and efficiency for both systems although the results are stronger for conventional banks. The capital effect is more pronounced for large, too-big-to-fail, and highly capitalized banks. The results are robust across various subsamples, alternative profitability and efficiency measures, and different estimation techniques.     

Optimal introductory pricing for new financial services

Financial services institutions often provide special introductory prices to new customers who sign up for their services such as credit cards, credit monitoring services and online stock trading. Despite their prevalence, the decision to provide introductory prices to new customers entails challenges for decision makers. Providing small incentives may not perceptibly affect the adoption of the service while providing a large incentive leads to the loss of revenue and profits. As a result, the effectiveness of such activities on firm profitability remains largely unexplored. This study seeks to address this gap in the literature by exploring optimal introductory pricing of a financial service. Employing agent-based simulation experiments, we find that offering introductory discounts significantly increases a firm’s net present value (NPV) of profits. Moreover, the findings suggest the amount of discount and the duration of time that a new customer receives the discount are critical factors in determining the NPV of profits. The research and managerial implications are discussed.     

Scale Efficiency in the New Zealand Dairy Industry: a Non-parametric Approach

The aim in this article is to measure the scale efficiency of the New Zealand dairy industry and to examine the relationship between farm size and technical efficiency. Data envelopment analysis (DEA) is applied to a sample of 264 dairy farms. The results suggest that 19 per cent of these farms are operating at optimal scale, 28 per cent at above optimal scale, and 53 per cent at below optimal scale. On average, the optimal size for New Zealand dairy farms is estimated at 83 hectares with a herd of 260 animals. Average technical efficiency is estimated at 89 per cent.     

Accountants’ cognitive styles and ethical reasoning: A comparison across 15 years

Recent attention to accountants’ ethics in the news, in professional practice, and by academia leads to questions about the ethical and cognitive characterization of students selecting accounting careers. We employ the Myers/Briggs Type Indicator (MBTI) for assessing cognitive styles, and the Defining Issues Test (DIT) for assessing ethical reasoning to study differences between two groups of accounting graduates and new hires entering the accounting profession across a period of 15 years. We show that the dominant cognitive make-up of accountants has not changed significantly over the study period, which is consistent with prior research. Also, we hypothesize and provide evidence that this dominant style is associated with lower levels of ethical reasoning (as measured by the DIT) than other cognitive styles. The ethical reasoning scores are lower for the 2005 sample than for the 1990 sample. This result may be attributable to age, gender, grade point average, or political orientation; however, incomplete data in our sample does not allow us to make definitive conclusions regarding these control variables. We discuss the implications of these findings for curriculum development and professional practice.     

Developing a Group Decision Support System for Advertising Media Evaluation: A Case in the Middle East

The importance of advertising media evaluation as a multifaceted problem is well known by both academics and practitioners. Although previous studies tried to optimize media evaluation, there still are some gaps and problems to address, particularly in areas of flexibility of models/frameworks, decision making quality, tension management, and agility of the evaluation process. Most of previous studies are based on inflexible models/frameworks that have limitations on number of criteria/alternatives they can consider and type of data they can process. A great volume of the work used arbitrary decision making; arbitrary decision making regarding criteria and media importance may reduce effectiveness of advertising campaigns. Furthermore, the academic literature offers little guidance on group decision aggregation, and tension management during decision making is neglected. Media evaluation is a time taking process and any acceleration will reduce pre-campaign costs. The main aim of this paper is to illustrate how a group decision support system (GDSS) can assist media planners to overcome mentioned problems more systematically. For this purpose, we developed a GDSS that is an integration of three well-known multi-criteria decision making techniques. With a real world case study, we illustrate the performance of the proposed GDSS. Results of our quantitative assessments indicate that the GDSS is flexible, allows decision makers to express their opinions, reduces tension among decision makers, and saves time.     

Leadership in Islam

Leadership is about knowledge, skills, and abilities for transformation. It is also increasingly about worldviews or visions of life—beliefs, values, and principles. But worldviews are also ways of life, for beliefs direct us, values guide us, and principles motivate us to certain kinds of action and behavior. How, then, do worldviews have an impact on leadership for transformation? If worldviews are glasses or filters by which we view the world, mental models of the bigger picture, frameworks by which we make sense of the world, and narratives by which we orient our lives, then how do they influence human thoughts, ideas, and behaviors when it comes to transformative leadership? This was the subject matter of an International Leadership Association Conference panel discussion held in November 2009 in Prague, entitled Leadership for Transformation: The Impact of Worldviews. It is also the subject matter of this issue's symposium, in which we bring you the four papers and the response presented at the conference. Members of the panel were characterized by gender, disciplinary, religious, and global diversity. Nathan Harter, organizational leadership professor at Purdue University in the United States, begins the discussion with some preliminary remarks about worldviews. Ali Mohammed Mir, medical doctor and director of programs of Population Council, Pakistan, speaks of leadership from an Islamic perspective. Michael Jones, accomplished composer, pianist, and leadership educator, writer, and speaker from Orillia, Canada, reflects on how a “marriage of mythos and logos” can transform leadership today. Lisa Ncube, originally from Zimbabwe and currently assistant professor of organizational leadership at Purdue University, speaks about Ubuntu as an alternative leadership philosophy emerging from Africa. John Valk, associate professor of worldview studies at Renaissance College, University of New Brunswick, Canada, speaks of leadership for transformation from a Christian worldview perspective. Jonathan Reams, associate professor in the Department of Education at the Norwegian University of Science and Technology in Trondheim, responds to all of the papers and opens a venue for further discussion. We hope that you will find this symposium engaging. We hope it will give food for thought and that it might stimulate further thinking regarding the role worldviews play in leadership for transformation.     

The mean residual of record values at the level of previous records

In the study of reliability of the technical systems, records model plays an important role. Suppose that a technical system is subject to shocks, e.g. peaks of voltages or stresses. The successive large shocks may be viewed as realizations of records from a sequence of identically independent voltages. Assume that the lower limit value of the mth record voltage (stress) is v > 0. Under these conditions, we propose a mean residual of records (MRR’s) for the future records. We study several properties of MRR. We show that the proposed MRR uniquely characterizes the distribution function that generated the sequence of records. It is proved that when the model under study has an increasing hazard rate the corresponding MRR is decreasing. We also compare between two record systems based on their MRR’s when these systems are ordered in terms of their hazard rates.     

A critical appraisal of the reporting quality of published randomized controlled trials in the fall injuries

To evaluate the quality of reporting in published randomized controlled trials (RTCs) in the field of fall injuries. The 188 RTCs published between 2001 and 2011, indexed in EMBASE and Medline databases were extracted through searching by appropriate keywords and EMTree classification terms. The evaluation trustworthiness was assured through parallel evaluations of two experts in epidemiology and biostatistics. About 40%–75% of papers had problems in reporting random allocation method, allocation concealment, random allocation implementation, blinding and similarity among groups, intention to treat and balancing benefits and harms. Moreover, at least 10% of papers inappropriately/not reported the design, protocol violations, sample size justification, subgroup/adjusted analyses, presenting flow diagram, drop outs, recruitment time, baseline data, suitable effect size on outcome, ancillary analyses, limitations and generalizability. Considering the shortcomings found and due to the importance of the RCTs for fall injury prevention programmes, their reporting quality should be improved.     

Bayesian Inference in Auditing: Evidence on the Most Appropriate Assessment Techniques

Interest in the use of the Bayesian statistical method in auditing has been increasing over the past few years. To use this method, however, appropriate prior probability assessment techniques (PPAT) need to be identified. This study uses three evaluation criteria, acceptability, accuracy and concordance, to compare four PPATs in auditing. The four PPATs compared are cumulative distribution function (CDF), probability density function (PDF), equivalent prior sample information (EPS), and hypothetical future samples (HFS). Seventy-three practising auditors were trained to use these four PPATs in their task of compliance error quantification in an audit case study. Results indicate that PDF is the most appropriate PPAT and EPS the least appropriate PPAT for use in practical audit situations. CDF and HFS were in the middle with no clear difference between them. Implications for audit practice and research are discussed.