Fare, Rolf and Zelenyuk, Valentin (2002): On Mr. Farrell's Decomposition and Aggregation. Published in: International Journal of Business and Economics , Vol. 4, No. 2 (2005): pp. 167-171.
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In this paper we show that in order to aggregate individual efficiency scores into a group (e.g., industry) efficiency score, in such a way that the multiplicative structure of further decompositions is preserved with equal weights across components, the weighted geometric mean is required. We also show how the weights can be chosen using a variation of a theorem by Koopmans (1957). In the end, our paper provides a mathematically consistent and economic-theory justified way of aggregation of Farrell-type efficiency scores.
|Item Type:||MPRA Paper|
|Original Title:||On Mr. Farrell's Decomposition and Aggregation|
|Keywords:||Farrell efficiency, Index Aggregation|
|Subjects:||D - Microeconomics > D2 - Production and Organizations > D24 - Production; Cost; Capital; Capital, Total Factor, and Multifactor Productivity; Capacity|
|Depositing User:||Valentin Zelenyuk|
|Date Deposited:||14. Jan 2011 12:47|
|Last Modified:||17. Feb 2013 22:33|
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Färe, R., S. Grosskopf and V. Zelenyuk (2004) "Aggregation of Cost Efficiency Indicators and Indexes Across Firms,” Academia Economic Papers, 32:2, pp. 395-411.
Färe, R. and V. Zelenyuk (2003), “On Aggregate Farrell Efficiency Scores,” European Journal of Operational Research 146:3, 615-620.
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