The Productivity of Intangible Factors of Production
研究了使用无形投入生产无形产出的企业的生产率测量难题，提出考虑这些要素独特属性的测量方法，并以管理咨询业为例进行应用。
This study addresses issues related to the productivity measurement of firms using intangible input to produce intangible output. It examines the difficulties associated with the productivity measurement of such firms and suggests a measure that takes account of the unique attributes of the factors used in their production. This issue is examined with application to a professional service industry—management consulting—in which all inputs and outputs are intangibles.