Extensive multilingualism is one of the most important and fundamental principles of the European Union (EU). However, a large number of languages (currently 23) hinders communication and imposes substantial financial and legal costs. On the other hand, the reduction of the number of languages...

Museum passes which give visitors access to several museums, are becoming more and more frequent. One of the problems encountered is the sharing of the proceeds. We recommend a fair and easily implementable sharing rule that takes into account the relative contribution of each individual museum...

We show that Baumol's conclusion that returns on bonds are higher than returns on paintings is too pessimistic. There are segments in the market for which returns are significantly higher than returns on bonds and stocks, during long periods of time (20 to 40 years); since tastes do change...

It is well known that the set of correlated equilibrium distributions of an n-player noncooperative game is a convex polytope that includes all the Nash equilibrium distributions. We demonstrate an elementary yet surprising result: the Nash equilibria all lie on the boundary of the polytope....

A column generation based approach is proposed for solving the cluster-wise regression problem. The proposed strategy relies firstly on several efficient heuristic strategies to insert columns into the restricted master problem. If these heuristics fail to identify an improving column, an...