Fare, Rolf and Zelenyuk, Valentin (2004): Aggregation of Scale Elasticities Across Firms. Unpublished.
Fare, Rolf; Grosskopf, Shawna and Zelenyuk, Valentin (2002): Finding Common Ground: Efficiency Indices. Published in: Aggregation, Efficiency, and Measurement (2007): pp. 83-95.
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.
