Enumeration of Nash equilibria for two-player games

This paper describes algorithms for finding all Nash equilibria of a two-player game in strategic form. We present two algorithms that extend earlier work. Our presentation is self-contained, and explains the two methods in a unified framework using faces of best-response polyhedra. The first method lrsnash is based on the known vertex enumeration program lrs, for “lexicographic reverse search”. It enumerates the vertices of only one best-response polytope, and the vertices of the complementary faces that correspond to these vertices (if they are not empty) in the other polytope. The second method is a modification of the known EEE algorithm, for “enumeration of extreme equilibria”. We also describe a second, as yet not implemented, variant that is space efficient. We discuss details of implementations of lrsnash and EEE, and report on computational experiments that compare the two algorithms, which show that both have their strengths and weaknesses.     

Exploring Consumers' Expectations of Sustainability in Mature and Emerging Markets

ABSTRACT

“Sustainability” has turned into a buzzword for businesses around the globe as consumers in mature and, increasingly, in emerging markets shift their demand toward sustainably enhanced products. Surprisingly, a global picture of consumers' expectations regarding sustainable products is still missing. This study uses exploratory factor analysis to determine the perceived importance and interrelation of selected sustainability aspects in three developed (Germany, Switzerland, United States) and three emerging (Brazil, China, India) markets. Results are linked to national cultural value theory to explore which sustainability aspects and positioning strategies may be promising to expand the outreach of sustainable products in developed and emerging markets alike. Results suggest that across the sampled economies, sustainability is increasingly considered as being comprised of a health aspect. While health and quality of life aspects emerged as key issues across countries, cultural backgrounds and local market conditions resulted in nuanced expectations of sustainability, which should be kept in mind in communicating and positioning sustainable products.     

When do cooperation and commitment matter in a monetary union?

This paper offers a framework to study strategic interactions between private players, national fiscal authorities and a common central bank in monetary unions. We establish general conditions, in terms of restrictions on spillover effects of actions by private and public players, under which games that differ in the degree of cooperation and commitment can admit the same equilibrium outcome. We use these conditions to characterize benchmark results on the irrelevance of cooperation and commitment established in recent literature. Moreover, we show for a general setting, in which the benchmark results do not apply, that gains from fiscal cooperation depend on the number of countries and increase as this number gets larger.     

Assessing the Competitiveness of International Financial Services in Particular Locations: A Survey of Methods and Perspectives

The International Financial Services (IFS) industry is restructuring internally and by location. This paper outlines the economic forces and analytical methods that may be applied to examine the economic drivers of these processes as ever more cities, particularly in East Asia, are vying to attract IFS providers and their clients. The ICT revolution has made those IFS that can be commoditized footloose in search of cost efficiency. High value-added financial services, however, will continue to be developed and coordinated in a few major IFS centers that have invested in, or capitalized on, regional or global advantages for themselves and their clients. The resulting pattern of functional fragmentation and geographic dispersal may facilitate analyses of the competitiveness of different lines of the financial services business in a particular location by methods such as Data Envelopment and Stochastic Frontier Analysis. These forms of comparative efficiency analysis have recently been questioned and their results reinterpreted.

Leadership in Organizational Knowledge Creation: A Review and Framework

Organizational knowledge creation integrates context, knowledge assets, and knowledge creation processes throughout the organization. Using organizational knowledge creation theory as an organizing framework, we conduct a literature review that shows prior work has focused on the role of central, upper‐echelon, leadership in knowledge creation processes, without devoting much attention to context and knowledge assets. To remedy these weaknesses, we develop a new framework for situational leadership in organizational knowledge creation. The framework is based on a continuum that ranges from centralized to distributed leadership at three layers of activity: a core layer of local knowledge creation; a conditional layer that provides the resources and context for knowledge creation; and a structural layer that forms the overall frame and direction for knowledge creation in the organization. We discuss the implications of this framework for theory and practice.     

On MLEs in an extended multivariate linear growth curve model

In this paper the extended growth curve model is considered. The literature comprises two versions of the model. These models can be connected by one-to-one reparameterizations but since estimators are non-linear it is not obvious how to transmit properties of estimators from one model to another. Since it is only for one of the models where detailed knowledge concerning estimators is available (Kollo and von Rosen, Advanced multivariate statistics with matrices. Springer, Dordrecht, 2005) the object in this paper is therefore to present uniqueness properties and moment relations for the estimators of the second model. One aim of the paper is also to complete the results for the model presented in Kollo and von Rosen (Advanced multivariate statistics with matrices. Springer, Dordrecht, 2005). The presented proofs of uniqueness for linear combinations of estimators are valid for both models and are simplifications of proofs given in Kollo and von Rosen (Advanced multivariate statistics with matrices. Springer, Dordrecht, 2005).     

Team autonomy,organizational commitment and company performance – a study in the retail trade

The study focuses on the relationship between perceived team autonomy and company performance through highlighting organizational commitment as a mediating factor in this relationship. Data collected in 2007 came from 25 small-sized companies in the retail trade, covering both the employer and employee levels (n = 369). This study aims to shed light on the following questions: first, is team autonomy associated with organizational commitment and company performance? Second, does commitment mediate the relationship between team autonomy and company performance? Results indicated that team autonomy was both directly and indirectly positively associated with company performance. Furthermore, organizational commitment partially mediated the relationship between team autonomy and company performance. Theoretical and practical implications of these findings are discussed.     

Marktchancen durch die Anpassung an den Klimawandel

Zusammenfassung  Im Jahr 2009 werden in Kopenhagen mit dem Kioto-Folgeabkommen die Weichen für die künftige internationale Klimapolitik gestellt. Neben der Verminderung der Emissionen wird die Anpassung an den zum Teil bereits einsetzenden Klimawandel eine zentrale Rolle spielen. Wie k?nnen die Entwicklungsl?nder bei ihren Anpassungsma?nahmen unterstützt werden? Welche Chancen ergeben sich hieraus für Unternehmen im Bereich der Umweltschutztechnologie? Prof. Dr. Michael von Hauff, 61, ist Inhaber des Lehrstuhls für Volkswirtschaftslehre an der Technischen Universit?t Kaiserslautern; PD Dr. Dirk Rübbelke, 36, ist wissenschaftlicher Mitarbeiter am Center for International Climate and Environmental Research Oslo. Danksagung: Die Arbeit von Herrn PD Dr. Dirk T.G. Rübbelke an diesem Aufsatz wurde im Rahmen des ADAM-Projekts (Adaptation and Mitigation Strategies — Supporting European Climate Policy) gef?rdert, welches von der Europ?ischen Kommission finanziert wird.     

Stock Externality vs. Symbiosis in a Forest-Air System

Stock externalities and ecological interaction have similar equilibrium effects. The influence on the dynamics of an ecosystem, however, is quite different. The different effects are laid out theoretically in the context of a forest-air model. We compare a centralized, welfare-maximizing policy and decentralized policies. Finally, we numerically simulate the dynamic differences between stock externalities and ecological interaction.