This paper uses Granger non{causality tests to analyze if channel competition exists between the companion websites of 93 German newspapers observed between I/1998 and II/2005. It provides econometric evidence for significant negative effects of companion website tra?c on the print circulation...

Trotz seiner in den vergangenen Jahren deutlich gestiegenen gesamtwirtschaftlichen Bedeutung ist über das Verhalten des Wirtschaftszweiges unternehmensnahe Dienstleistung im Konjunkturzyklus bislang wenig bekannt. Es erscheint wegen der starken Outsourcingaktivitäten des verarbeitenden...

This paper aims at providing business survey analysts with simple econometric tools to quantify qualitative survey data. We extend the traditional and commonly applied method proposed by Carlson and Parkin (1975) to capture observable survey respondent heterogeneity. We also discuss...

This paper develops a three stage oligopoly game for R&D cooperation, R&D expenditure and product market competition. In the first stage, firms decide whether or not to conduct R&D in cooperation with other firms. In the second stage the level of R&D investment is determined. Finally, firms...