By focusing on the constructive and combative spillover effects of the firms’ investment in research and development (R&D), we develop a horizontally differentiated duopoly model in which R&D investment used to improve product quality influences consumer preferences and the choice of...

We investigate a two-part tariff licensing contract that enables an incumbent innovator to license the technology for a new product to a potential rival, who may alternatively develop a compatible technology for an imperfectly substitutable product. We identify the optimal two-part tariff...