Equilibrium uniqueness in entry games with private information
研究了单维私有信息下静态进入博弈的均衡，提出“力量”概念并证明存在一种按力量排序的均衡，给出了保证均衡唯一性的简单可检验条件。
Abstract We study equilibria in static entry games with single‐dimensional private information. Our framework embeds many models commonly used in applied work, allowing for firm heterogeneity and selective entry. We introduce the notion of strength, which summarizes a firm's ability to endure competition. In environments of applied interest, an equilibrium in which entry strategies are ordered according to the firms' strengths always exists. We call this equilibrium herculean. We derive simple and testable sufficient conditions guaranteeing equilibrium uniqueness and, consequently, a unique counterfactual prediction.