This discussion paper led to a publication in 'Social Choice and Welfare', 2005, 24, 439-454.<P> Many economic and social situations can be represented by a digraph. Both axiomatic and iterativemethods to determine the strength or power of all the nodes in a digraph have been proposed inthe...</p>

In this paper we present an axiomatic analysis of several ranking methods for tournaments. We find that two of them exhibit a very good behaviour with respect to the set of properties under consideration. One of them is the maximum likelihood ranking, the most common method in statistics and...

We analyze patent licensing by a patent holder to downstream technology users. We study how the structure and level of royalties depends on the patent’s strength, i.e., the probability it would be upheld in court. We examine the social value of determining patent validity before...

This discussion paper led to a publication in <A href="http://www.sciencedirect.com/science/article/pii/S0095069611001380">'Journal of Environmental Economics and Management'</A>.<p>Water markets with market power are analysed as multi-market Cournot competition in which the river structure constrains access to local markets and limited resources impose capacity constraints....</p></a>