Am Abend des 30. Oktober 1938 löste eine Radiosendung in den USA eine Massenhysterie aus (vgl. Wells 1974: 342). Das Hörspiel Krieg der Welten wurde von ca. sechs Millionen Menschen verfolgt, zwei Millionen von ihnen glaubten, die Sendung basiere auf aktuellen Geschehnissen. Die darauf...

When workers send applications to vacancies they create a network. Frictions arise becauseworkers typically do not know where other workers apply to and firms do not know whichcandidates other firms consider. The first coordination friction affects network formation, whilethe second coordination...

This paper analyses the effects of innovation networks on product and pro-cess innovation and sales growth of high technology SMEs. Innovation net-works are positively related to both product and process innovation, i.e. know-ledge creation. One exception is the negative effect of innovation...

This paper analyses the process of knowledge growth in a branch of medical science. Our study of scientific advances in glaucoma research is organized in two parts. In the first we present a qualitative overview of the problem sequences that have characterized 150 years of medical research in...

Unemployment may depend on equilibrium in other markets than the labor markets. Thispaper adresses this old idea by introducing search frictions on several markets: in a model ofcredit and labor market imperfections as in Wasmer and Weil (2004), I further introducesearch on the goods market. The...

In-work benefits are becoming an increasingly relevant labour market policy, graduallyexpanding in scope and geographical coverage. This paper investigates the equilibriumimpact of in-work benefits and contrasts it with the traditional partial equilibrium analysis. Wefind under which conditions...

In der vorliegenden Arbeit werden die wichtigsten Informationen über Entwicklungen in Bezug auf die Benutzeroberfläche und die Recherchemöglichkeiten von OPACs und ihrem Umfeld zusammengetragen, gewichtet und bewertet. Heute schon realisierte Konzepte und viel verspre-chende Modelle für die...

In this paper we empirically examine differences in search behavior between men andwomen. We assess hypotheses regarding duration of search, wages and tenure. Thehypotheses are derived from two models: the equilibrium search model with discriminatoryfirms by Black (1995) and an opportunity cost...

Ergebnisse der Umfrage des VHB zur wissenschaftlichen Qualität von Zeitschriften im Bereich der Betriebswirtschaftslehre, VHB-JOURQUAL. Insgesamt haben sich 653 Mitglieder und Habilitierende an der Umfrage beteiligt.

This paper examines the puzzlingly high unexploited momentum returns from a new perspective.We analyze characteristics of momentum traders in a sample of 692 fund managers. Wefind that momentum traders are “defined” by their short-term horizon, by a behavioural viewon the market and by a...