Abstract
Does risk aversion lead to softer or fiercer competition? To give a complete answer, I provide a framework that can accommodate a wide range of alternative assumptions regarding the nature of competition and types of uncertainty. I show how more risk aversion will influence a firm's best response strategies, and that competition is unambiguously softer only in case of marginal cost uncertainty. In contrast to risk neutrality, the best response strategies depend on the level of fixed costs. This fact is extended to cover strategic investment models, and to analyse the importance of accumulated profits. I conclude by a discussion of how it is possible to test for risk-averse behaviour in oligopoly by conditioning on the type of uncertainty.