Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/30562
Title: Congestion and returns to scale in data envelopment analysis
Authors: Wei, Q
Yan, H 
Keywords: Congestion
Data envelopment analysis
Efficiency
Return to scale
Issue Date: 2004
Publisher: Elsevier
Source: European journal of operational research, 2004, v. 153, no. 3 spec. iss., p. 641-660 How to cite?
Journal: European journal of operational research 
Abstract: Congestion indicates an economic state where inputs are overly invested. Evidence of congestion occurs whenever reducing some inputs can increase outputs. Return to scale is another related important economic implication of DEA efficiencies. In this research, we discuss together the problems of congestion, constant return to scale, increasing return to scale and decreasing return to scale by output oriented DEA models, C 2R model, BC 2 model, FG model, ST model, and a modified model. We identify the necessary and sufficient conditions for the evidence of congestion, constant, increasing and decreasing returns to scale. We show the exclusive relationships between the concepts of congestion and returns to scale. Numerical examples are provided for illustration.
Description: ORP3 - Operation Research Peripatetic Postgraduate Programme, A EURO Conference for young OR researchers, The ORP3 Conference was held at LAMSADE, Universit e Paris Dauphine,26–29 September 2001
URI: http://hdl.handle.net/10397/30562
ISSN: 0377-2217
EISSN: 1872-6860
DOI: 10.1016/S0377-2217(02)00799-3
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