In a framework with an upstream monopoly and a downstream duopoly, we analyze the impact of convex costs on the downstream level. In contrast to the case of constant marginal costs, vertical integration does not imply complete market foreclosure. While the non-integrated downstream firm receives...

Under perfect competition on the output market, first best technology subsidies in the presence of learning by doing are justified by knowledge spill overs that are not accounted for by individual companies. First best output subsidies are thus depending directly on the learning effects and are,...

Can a growing welfare state induce a regime switch in the growth rate of an economy? This paper constructs a dynamic political economy model of economic growth and the welfare state in which both variables are non-linearly related and jointly endogenous. Using a Markov switching framework over...