The paper presents a fully dynamic framework for simultaneous analysis of variety enhancing and quality improving innovations for the case of a single agent. There is a continuous stream of variety enhancing innovations and every new product from this stream has its own quality dimension which...

Current paper analyses the influence of the length of production technologies life-cycles on the relative intensity of investments of a multi-product monopolist into different types of innovations. This monopolist is developing new versions of the basic product continuously and simultaneously...

This paper introduces the dynamical framework which combines product and process innovations. The model contributes to the theoretical literature on innovations in two ways. First, it permits for the simultaneous dynamics of both types of innovations which is rarely considered in the literature....

This paper proposes a reduced form model of dynamic duopoly in the context of heterogeneous innovations framework. Two agents invest into product and process innovations simultaneously. Every newly introduced product has its own dimension of process-improving innovations and there is a continuum...

Sustainability of public debt has become a major issue in the debate over the success of the European Monetary Union. The authors pursue the question of whether Germany’s fiscal policy is sustainable. With sustainability of a given fiscal policy, the authors refer to a policy that...

We present a monetary endogenous growth model and analyse the effects of fiscal and monetary policy with real money as an argument in the utility function. We show that a balanced government budget gives a higher balanced growth rate and lower inflation than a situation with permanent public...