Wettbewerbsmessung im Bankensektor: alternative Maße — divergierende Ergebnisse

Precise assessment of the competitive conditions is the necessary foundation of numerous stability, productivity and profitability analyses of the banking industry. From a theoretical point of view, a wide range of alternative approaches are available. Nonetheless, the operationalisation of these measures has proved difficult due to regional market conditions, individual business models and generally high data requirements. Considerable divergences and contradictory results are revealed by a comparison of more than 50 studies from four decades. In reference to the resilience and comparability of regulatory inferences, the question remains as to which measure should be favoured in the future.     

Competition Tests with a Non-Structural Model: the Panzar–Rosse Method Applied to Germany's Savings Banks

Abstract. In this paper we adopt the Panzar–Rosse approach to assess the competitive conditions in the German banking market for the period from 1993 to 2002. We suggest several improvements to the empirical application of the approach and show that frequently used empirical models that apply price rather than revenue functions lead to biased results. Using disaggregated annual data from more than 400 savings banks (Sparkassen) the empirical findings indicate monopolistic competition, the cases of monopoly and perfect competition are strongly rejected. Furthermore, small banks seem to enjoy even more market power than larger institutions.     

A limit theorem for systems of social interactions

In this paper, we establish a convergence result for equilibria in systems of social interactions with many locally and globally interacting players. Assuming spacial homogeneity and that interactions between different agents are not too strong, we show that equilibria of systems with finitely many players converge to the unique equilibrium of a benchmark system with infinitely many agents. We prove convergence of individual actions and of average behavior. Our results also apply to a class of interaction games.     

The price of ethics and stakeholder governance: The performance of socially responsible mutual funds

Do investors pay a price for investing in socially responsible investments (SRI) funds, or do they obtain superior returns? This paper investigates these under- and overperformance hypotheses for all SRI funds across the world. Consistent with investors paying a price for ethics, SRI funds in the US, the UK, and in many continental European and Asia-Pacific countries underperform their domestic benchmarks by − 2.2% to − 6.5%. However, with the exception of some countries such as France, Japan and Sweden, the risk-adjusted returns of SRI funds are not statistically different from the performance of conventional funds. We also find that the underperformance of SRI funds is not driven by loadings on an ethics style factor. There is mixed evidence of a smart money effect: SRI investors are unable to identify the funds that will outperform in the future, whereas they show some fund-selection ability in identifying funds that will perform poorly. Finally, corporate governance and social screens yield lower risk-adjusted returns.