computing economies of scope using robust partial frontier nonparametric methods
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ID: 206572
2016
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Abstract
This paper proposes a methodology to examine economies of scope using the recent order-α nonparametric method. It allows us to investigate economies of scope by comparing the efficient order-α frontiers of firms that produce two or more goods with the efficient order-α frontiers of firms that produce only one good. To accomplish this, and because the order-α frontiers are irregular, we suggest to linearize them by the DEA estimator. The proposed methodology uses partial frontier nonparametric methods that are more robust than the traditional full frontier methods. By using a sample of 67 Portuguese water utilities for the period 2002–2008 and, also, a simulated sample, we prove the usefulness of the approach adopted and show that if only the full frontier methods were used, they would lead to different results. We found evidence of economies of scope in the provision of water supply and wastewater services simultaneously by water utilities in Portugal.
| Reference Key |
carvalho2016watercomputing
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|---|---|
| Authors | ;Pedro Carvalho;Rui Cunha Marques |
| Journal | Journal of food biochemistry |
| Year | 2016 |
| DOI |
10.3390/w8030082
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| URL | |
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