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This paper evaluates how different lengths of entry regulation impact market structure and market performance using a dynamic structural model. We formulate an oligopoly model in the tradition of Ericson and Pakes (1995) and allow entry costs to vary over time. Firms have the opportunity to...
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firms may protect their inventions by means of intellectual property rights, such as patents. By taking out a patent … of patents on the dissemination of R&D findings is, however, insignificant. Therefore, we conclude that patent …
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