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Economies of scale in community water systems
Author(s) -
Shih JhihShyang,
Harrington Winston,
Pizer William A.,
Gillingham Kenneth
Publication year - 2006
Publication title -
journal ‐ american water works association
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.466
H-Index - 74
eISSN - 1551-8833
pISSN - 0003-150X
DOI - 10.1002/j.1551-8833.2006.tb07757.x
Subject(s) - economies of scale , production (economics) , unit (ring theory) , unit cost , economics , water supply , scale (ratio) , economies of agglomeration , capital (architecture) , agency (philosophy) , business , microeconomics , environmental science , environmental engineering , physics , mathematics education , mathematics , archaeology , quantum mechanics , history , philosophy , epistemology
Data sets from the U.S. Environmental Protection Agency's 1995 and 2000 Community Water Systems surveys were used to examine the production costs of water supply systems. The authors estimate water supply economies of scale by estimating the elasticities of both the total unit cost and the individual component costs. For total unit cost, they found that a 1% production increase reduced unit costs by a statistically significant 0.16%. For individual component costs, higher economies of scale in capital, materials, outside services, and other costs and lower, but still positive, economies of scale in labor and energy costs were found. These economies of scale may reflect production economies or suggest that larger systems are better than smaller systems at bargaining and receiving services and materials at a lower unit cost. Importantly, bargaining gains and some production economies do not necessarily depend on water systems becoming physically interconnected.