In recent years, understanding the structure and function of complex networks has become the foundation for explaining many different real- world complex social, information, biological and technological phenomena. Techniques from statistical physics have been successfully applied to the...

The note documents and discusses the modalities and consequences of the phenomenon of siphoning profits of state enterprises for private uses by state enteprise managers and insiders in Bulgaria during the period of early transition.

We analyze models of product differentiation with perfect price discrimination and free entry. Although perfect price discrimination ensures efficient output decisions given product characteristics, coordination failures may prevent efficiency in the choice of product characteristics. More...

Artificial life (alife) is the bottom-up study of basic phenomena commonly associated with living agents, such as self- replication, evolution, adaptation, self-organization, exploitation, competition, cooperation, and social network formation. Alife complements the traditional biological and...

Traditional merger analysis, based on market definition and use of concentration measures to infer potential anti-competitive effects, is problematic and difficult to implement when evaluating mergers in industries with differentiated products. This paper discusses an alternative which consists...

This study applies a Super Efficiency Data Envelopment Analysis model to evaluate the efficiency of cars sold on the German market. Efficiency is conceptualized from a customers' perspective as a ratio of outputs that customers obtain from a product relative to inputs that customers have to...

Mit dem Einsatz von Employee Portalen verfolgen Unternehmen das Ziel, eine leistungsfaehige Technologie zur Schaffung von sog. personalisierten Arbeitsplaetzen am Desktop eines jeden Mitarbeiters bereitzustellen. Das Portal versorgt als Front-end des virtuellen Arbeitsplatzes den Mitarbeiter mit...

The purpose of this study is to provide a broader, economic perspective on customer value management. By developing an efficiency-based concept of customer value we aim at contributing to the presently underrepresented research field of marketing economics. The customer value concept is utilized...

Undesirable outputs are often produced together with desirable outputs. This joint production of good and bad outputs brings about a difficulty for productivity measurement. Here we introduce a directional distance function and use it as a component in a new productivity index. This index, as an...