Im Zuge der sukzessiven Verknappung des Erdöls als Energierohstoff durch sinkende Fördermengen und steigende Nachfrage in Schwellenländern - dazu der drohende Klimawandel - findet bei Stadt- und Raumplanung eine verstärkte Auseinandersetzung mit dem Thema der post-fossilen Lebensweise statt....

We develop a dynamic network formation model that can explain the observed nestedness in real-world networks. Links are formed on the basis of agents’ centrality and have an exponentially distributed life time. We use stochastic stability to identify the networks to which the network formation...

We develop a tractable dynamic model of productivity growth and technology spillovers that is consistent with the emergence of real world empirical productivity distributions. Firms can improve productivity by engaging in in-house R&D, or alternatively, by trying to imitate other firms’...

We study a structural model of R&D alliance networks in which firms jointly form R&D collaborations to lower their production costs while competing on the product market. We derive the Nash equilibrium of this game, provide a welfare analysis and determine the optimal R&D subsidy program that...