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Equivalence results when firms compete in prices/quantities and innovation effort

机译:当企业在价格/数量和创新努力中竞争时,就会得出等价结果

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I consider the classical oligopoly game in which firms choose prices or quantities at the same time each chooses an innovation effort that directly establishes its (constant) marginal cost of production. I show how this game can be viewed as completely equivalent to a standard oligopoly game in which firms simply choose prices or quantities given a strictly concave cost of producing output. Hence, the effect of changing parameters unrelated to technology (e.g., the number of competing firms, the size of the market, or the number of merging firms) can be studied with no loss in a setting in which firms cannot innovate and produce using an increasing marginal returns technology. Exactly the same equivalence persists when performing welfare analysis, so the comparison between welfare benchmarks and equilibrium outcomes is the same as when firms choose prices or quantities given a strictly concave cost of producing output. (C) 2019 Elsevier B.V. All rights reserved.
机译:我认为经典的寡头博弈中,企业同时选择价格或数量,每个企业都选择直接确定其(恒定)边际生产成本的创新努力。我将展示如何将这种博弈视为完全等同于标准的寡头博弈,在这种博弈中,企业仅在严格限制生产产出成本的情况下选择价格或数量。因此,可以在不因企业无法使用产品而进行创新和生产的情况下,毫不费力地研究改变与技术无关的参数(例如,竞争企业的数量,市场规模或合并企业的数量)的影响。增加边际收益技术。进行福利分析时,确实存在相同的等价性,因此福利基准与均衡结果之间的比较与公司在严格降低生产成本的情况下选择价格或数量时相同。 (C)2019 Elsevier B.V.保留所有权利。

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