Firm Diversity: Conceptualization and Measurement
识别了两种企业多元化的概念与测量方式（按业务数量与按战略），讨论其优劣，并评估它们对常见研究问题的适用性。
Two fundamentally different ways of conceptualizing and measuring firm diversity—by business count and by strategy—are identified, their strengths and weaknesses discussed, and their suitability for investigating commonly asked questions evaluated. A business count measure is claimed to be suitable for research comparing diversified and nondiversified firms but not for investigating differences among diversified firms. For the latter task, a strategic measure of diversity is recommended.