The Measurement of Firm-Specific Indexes of Technical Change
提出一种计量方法估算企业层面的技术变化，并与全要素生产率指数对比。基于航空公司面板数据，发现两者在产出特征不同时差异显著，燃料效率和载客率是效率提升的主因。
This paper proposes a methodology for obtaining estimates of firm-specific technical change econometrically and contrasts those estimates with a multilateral total factor productivity index. Based on a panel data set of airlines, two measures are contrasted in a variety of ways. To the extent that output characteristics differ as in the case of airlines, the two measures differ significantly. Both measures are regressed on a variety of factors potentially influencing technical efficiency, confirming that improvements in fuel efficiency and load factor have played major roles, with hubbing and competition playing smaller roles, in explaining efficiency improvements. Copyright 1995 by MIT Press.