Public policies,pressure groups,and dead weight costs

This paper presents a model of competition among special interest groups for political influence. Each active group exerts pressure to affect its taxes and subsidies, where activities of different groups are related by the equality between total tax collections and total tax subsidies. The dead weight costs and benefits of taxes and subsidies play a major role in our model. An increase in the dead weight cost of taxation encourages pressure by taxpayers, while an increase in the dead weight costs of subsidies discourages pressure by recipients. Various applications of the analysis are discussed.     

Robust min–max portfolio strategies for rival forecast and risk scenarios

We consider an extension of the Markowitz mean–variance optimization framework to multiple return and risk scenarios. It is well known that asset return forecasts and risk estimates are inherently inaccurate. The method proposed provides a means for considering rival representations of the future. The optimal portfolio is computed, simultaneously with the worst case, to take account of all rival scenarios. This is a min-max strategy which is essentially equivalent to a robust pooling of the scenarios. Robustness is ensured by the noninferiority of min–max. For example, a basic worst-case optimal return is guaranteed in view of multiple return scenarios. If robustness happens to have too high a cost, guided by the min–max pooling, it is also possible to explore other pooling alternatives. A min–max algorithm is used to solve the problem and illustrate the robust character of min–max with return and risk scenarios. We study the properties of the min–max risk–return frontier and compare with the potentially suboptimal worst-case where the investment strategy and the worst case are computed separately.     

Healthcare rationing and patient rights

All modern healthcare systems face growing gaps between funding and treatment possibilities. Societal expectations call for decisions on whether to relax or accept resource constraints and how to deal with the respective consequences. The following article compares the different ways in which the healthcare systems in the USA, Germany and the UK have dealt with these problems to date.     

Exploring globalization and marketing performance at the 2012 Global Marketing Conference at Seoul

This special issue of the Journal of Business Research features sixteen articles selected from papers presented during the third Global Marketing Conference held in Seoul, July 19–22, 2012, hosted by Korean Scholars of Marketing Science, European Marketing Academy, Japan Society of Marketing and Distribution, International Textile and Apparel Association, and Australian and New Zealand Marketing Academy. The articles offer readers an interesting mix of topics and methods in complex and global marketing environments. They offer marketing practitioners new ideas and approaches for dealing effectively with the increasingly challenging marketing world and provide marketing researchers insights that may inspire future research.     

The Research Field “Modeling Business Information Systems”

The research field “Modeling business information systems” has a long tradition in the scientific discipline of Business and Information Systems Engineering (BISE). The present paper highlights research shaping the research field, discusses challenges impairing the development of the research field in the coming years, and outlines elements of a future research agenda.