The effect of exit barriers upon strategic flexibility
扩展了退出壁垒的概念，提出通过帮助边缘竞争者退出波动性业务来克服资源不可流动性，并讨论了企业实施该策略的条件。
Abstract The conceptual construct, exit barriers, is expanded using both statistical findings and the results of field studies. The immobility of resources, it is suggested, can be overcome by helping marginal competitors to exit from potentially volatile businesses. The implementation of such tactics can be adapted to the firm's own strategic commitment and to the nature of the business in question, although it is expected that firms which might consider purchasing the physical and intangible assets of competitors in order to help them to scale high exit barriers, must themselves perceive the business to be of sufficiently high strategic importance to do so.