Strategic groups, asymmetrical mobility barriers and contestability
梳理并拓展了战略群组文献，区分了两种群组形成方法，强调非对称移动壁垒和竞争优势在行业整合中的重要性，并将群组与可竞争性概念联系起来以解释行业结构演化。
Abstract This paper examines the literature on strategic groups and extends it: first, by clarifying the distinction between two alternate approaches to forming groups, emphasizing that multivariate group analysis can be used to conserve information not only summarize it as bivariate grouping does; second, by focusing attention on the importance of asymmetrical mobility barriers and competitive advantage in the process of industry consolidation and concentration; and third, by linking groups and the concept of contestability in an effort to make some progress towards explaining the evolution of industry structure.