英文文献：Market Power and Growth through Vertical and Horizontal Competition
英文文献作者：Gilad Sorek
英文文献摘要：
I study the implications of innovators' market power to growth and welfare in a two-R&D-sector economy. In this framework either vertical or horizontal competition is binding in the price setting stage, depending on the model parameters and the implemented market-power policy. I consider two alternative policies that are commonly, yet separately, used in the literature to constraint innovators' market power: patent lagging-breadth protection and direct price controls. I show that (a) the alternative policies may have non-monotonic and contradicting effects on growth (b) unconstrained market power may yields either excessive or insufficient growth compared with social optimum and (c) the social optimum can be achieved by reducing innovators market power with the proper policy instrument, along with a corresponding flat rate R&D-subsidy.