This paper presents a model of R&D-driven growth without scale effects where firms can engage in both horizontal and vertical R&D activities.

This paper presents a model to explain why both industry leaders and follower firms often invest in R&D and explores the welfare implications of these R&D investment choices. Regardless of initial conditions, the equilibrium path in this model involves gradually convergence to a balanced growth...

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Market competition is central to innovative activity, the diffusion process and macro-economic productivity growth. Productivity growth at all levels comes about through institutional reconfiguration in response to the ongoing market process. Stable and sustained long-term growth in output...

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