This Paper introduces optimal competition: the best form of competition in an industry that a competition authority can … competition outcome in an industry becomes more competitive as more money is spent in the industry, as the competition authority … puts less weight on producer surplus and more weight on employment. The relation between competition and entry costs is U …

product competition tends to increase the relative profitability of innovation for sale relative to entry. Increased … competition reduces entrants' and acquirers' profits in a similar fashion, but also reduces the profit of non-acquirers. Therefore …, incumbents' valuations of innovations are less negatively affected by increased competition than entrants' profits. This, in turn …

I analyse the effects of competition on R&D effort (in a non-tournament context) and obtain robust results that hold … either price or quantity competition. The approach encompasses models of direct investment to reduce costs as well as models …