The purpose of this paper is to focus on the strategic decision as to whether or not merger is profitable according to the degree of final product differentiation in bilaterally duopolistic industries. We find that, under some conditions on the factor of substitution, a horizontal merger is...

Our aim is to see whether the general result of a decreasing over contribution over time in a public goods game is still available at the group and at the individual levels. We find that individuals are heterogeneous and that they interact differently.