We examine the bipartite graphs of German corporate boards in 1993, 1999 and 2005, and identify cores of directors who are highly central in the entire network while being densely connected among themselves. Germany’s corporate governance has experienced significant changes during this time,...

I study the effect of reference pricing on competition by parallel imports, in particular the market share of parallel imports and the number of parallel traders. First, I analyze the effect of reference pricing on competition by parallel imports in a vertical differentiation model with a...

In this paper, I study the effect of a change in the mandatory manufacturer rebate on wholesale prices for pharmaceuticals on competition by parallel imports. First, I analyze the effect of a manufacturer rebate on competition by parallel imports in a two-country model. An increase in the...

I study the effect of reference pricing on competition by parallel imports, in particular the market share of parallel imports and the number of parallel traders. First, I analyze the effect of reference pricing on competition by parallel imports in a vertical differentiation model with a...

In this paper we analyze transitions in the stock markets of the US, the UK, and Germany. For all this markets we find that while the markets were focused on stocks from the IT and technology sector around the year 2000, this focus has vanished and the markets have mostly moved towards a focus...

In the current era of strong worldwide market couplings the global financial village became highly prone to systemic collapses, events that can rapidly sweep through out the entire village. Here we present a new methodology to assess and quantify inter-market relations. The approach is based on...