The Lerner Index and Economic Efficiency


This short paper brings together two literatures: the first is the Lerner Index as a measure of imperfect competition familiar from industrial organization and the second is a measure of performance from the efficiency literature, namely the Nerlovian indicator. We show how these may be related and the resulting decomposition of the Lerner index which results.

Share and Cite:

Chambers, R. , Färe, R. and Grosskopf, S. (2014) The Lerner Index and Economic Efficiency. Theoretical Economics Letters, 4, 803-805. doi: 10.4236/tel.2014.49101.

Conflicts of Interest

The authors declare no conflicts of interest.


[1] Farrell, M.J. (1957) The Measurement of Productive Efficiency. Journal of the Royal Statistical Society Series A, General, 120, 253-281.
[2] Georgescu-Roegen, N. (1951) The Aggregate Linear Production Function and Its Application to the Von Neumann Economic Model. In: Koopmans, T., Ed., Activity Analysis of Production and Allocation, Wiley, New York.
[3] Lerner, A.P. (1934) The Concept of Monopoly and the Measurement of Monopoly Power. The Review of Economic Studies, 1, 157-175.
[4] Samuelson, P.A. (1964) A.P. Lerner at Sixty. The Review of Economic Studies, 31, 169-178.
[5] Chambers, R.G., Chung, Y. and Färe, R. (1998) Profit, Directional Distance Functions, and Nerlovian Efficiency. Journal of Optimization Theory and Applications, 98, 351-364.
[6] Luenberger, D.G. (1992) New Optimality Principles for Economic Efficiency and Equilibrium. Journal of Optimization Theory and Applications, 75, 221-264.

Copyright © 2021 by authors and Scientific Research Publishing Inc.

Creative Commons License

This work and the related PDF file are licensed under a Creative Commons Attribution 4.0 International License.