Results from portfolio models for credit risk tell us that loan concentration in certain industry sectors can substantially increase the value-at-risk (VaR). The purpose of this paper is to analyze whether a tractable "infection model" can provide a meaningful estimate of the impact of...

Since the early 1990s an unprecedented process of consolidation has taken place in the banking sector in most industrialised countries raising concern of policymakers that it may reduce access to credit for the small business sector. While most of the existing empirical studies have focused on...

Eine Welle von Fusionen hat die Weltwirtschaft erfasst. Allein die Dimension der bei Großfusionen genannten Summen, die nicht selten das Bruttoinlandsprodukt von Volkswirtschaften übersteigen, führen zu einem erheblichen Maß an Verunsicherung. Dies wird auch in den Überschriften von...