Anna Bottasso

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In this paper we estimate a variable cost function to analyze cost economies and technical change in the English water only sector over the 1995-2005 period. We jointly model the impact on costs of output, customers numbers and area size which allows us to consider both the vertical and horizontal (spatial) dimensions of water utilities’operations.(More)
In this study we analyze the evolution of operating cost inefficiency for the English and Welsh water industry over the period 1995-2001 by estimating an heteroskedastic stochastic variable cost frontier. The main aim of this paper is to provide an overall picture of the industry cost inefficiency, as we consider both the water and sewerage companies and(More)
Excessive working hours--even at night--are becoming increasingly common in our modern 24/7 society. The prefrontal cortex (PFC) is particularly vulnerable to the effects of sleep loss and, consequently, the specific behaviors subserved by the functional integrity of the PFC, such as risk-taking and pro-social behavior, may be affected significantly. This(More)
Empirical literature on the cost structure of multiproduct firms traditionally assumes a common technology across different products and stages of production, letting the issue of poolability unexplored. The appropriateness of this assumption is tested by using data from UK specialized and diversified water utilities and by estimating a General cost(More)
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