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  • 1
    Electronic Resource
    Electronic Resource
    Maximum likelihood estimation of monotone and concave production frontiers (1992)
    Springer
    Journal of productivity analysis 3 (1992), S. 401-415 
    Details
    ISSN: 1573-0441
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract In this paper we bring together the previously separate parametric and nonparametric approaches to production frontier estimation by developing composed error models for maximum likelihood estimation from nonparametrically specified classes of frontiers. This approach avoids the untestable restrictions of parametric functional forms and also provides a statistical foundation for nonparametric frontier estimation. We first examine the single output setting and then extend our formulation to the multiple output setting. The key step in developing the estimation problems is to identify operational constraint sets to ensure estimation from the desired class of frontiers. We also suggest algorithms for solving the resulting constrained likelihood function optimization problems.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00163435
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    Paper (German National Licenses)
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  • 2
    Electronic Resource
    Electronic Resource
    Profitability, productivity and price recovery patterns in the U.S. telecommunications industry (1996)
    Springer
    Review of industrial organization 11 (1996), S. 1-17 
    Details
    ISSN: 1573-7160
    Keywords: Productivity ; performance analysis ; telecommunications ; L96 (Telecommunications) ; M40 (Accounting: General)
    Source: Springer Online Journal Archives 1860-2000
    Topics: Economics
    Notes: Abstract We undertake a study where we examine changes in the profitability, productivity and price recovery of firms in the U.S. telecommunications industry over a sixteen-year period. We assess the performance of thirty-three major companies in the local-exchange sector over six time periods 1975, 1978, 1981, 1984, 1987 and 1990, using a performance analysis model which disaggregates the profitability measure into two components: productivity and price recovery. We demonstrate the computation of performance using this technique. Our study indicates that the opening up of markets has had a significant impact on different dimensions of performance in the telecommunications industry, also validating a number of theoretical assumptions about the impact that industry changes are expected to have on firms.
    Type of Medium: Electronic Resource
    URL: http://dx.doi.org/10.1007/BF00163594
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    Paper (German National Licenses)
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