On the measurement of corporate diversification strategy: Evidence from large U.S. service firms
研究发现，基于内部数据测量的企业多元化战略与基于外部数据测量的结果存在显著差异，因为实际关联性而非潜在关联性决定了多元化战略的效果。
Abstract Actual, not potential, relatedness determines the results of diversification strategies. An external examination of a firm's businesses, products, markets and technologies permits an assessment of potential relatedness among its various businesses. Potential relatedness is, however, often not realized. Also, relatedness may be externally invisible. Hence, actual relatedness may diverge from externally measured potential relatedness. This paper provides evidence suggesting that measures of corporate diversification strategy based on internal data differ significantly from those based on externally available data.