Blar i Discussion papers (FOR) på forfatter "Cheng, Xiaomei"

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    • Cost efficiency analysis based on the DEA and StoNED models : case of Norwegian electricity distribution companies 

      Cheng, Xiaomei; Bjørndal, Endre; Bjørndal, Mette (Discussion papers;28/14, Working paper, 2014-06)
      Our paper applies data envelopment analysis (DEA) and stochastic non-parametric envelopment of data (StoNED) to measure cost efficiency of electricity distribution companies. The data cover 123 Norwegian electricity ...

    • Malmquist Productivity Analysis based on StoNED 

      Cheng, Xiaomei; Bjørndal, Endre; Bjørndal, Mette (Discussion paper;25/15, Working paper, 2015-09-24)
      We construct a Malmquist productivity index based on stochastic non-parametric envelopment of data (StoNED) method, and we study how the distributional assumptions in the second StoNED stage affect productivity change ...

    • On the Distributional Assumptions in the StoNED model 

      Cheng, Xiaomei; Andersson, Jonas; Bjørndal, Endre (Discussion paper;24/15, Working paper, 2015-09-17)
      In a recent paper Johnson and Kuosmanen (2011) propose a new, semi-parametric, general cost-frontier model, the stochastic nonparametric envelopment of data (StoNED). The model is semi-parametric in the sense that the ...

    • Optimal Scale in Different Environments – The Case of Norwegian Electricity Distribution Companies 

      Cheng, Xiaomei; Bjørndal, Endre; Bjørndal, Mette (Discussion paper;22/15, Working paper, 2015-09-17)
      We study returns to scale in Norwegian electricity distribution companies. The scale issue of this sector has become an important political question, and it was for instance discussed by the Reiten commission (OED, 2014) ...

    • Productivity Development for Norwegian Electricity Distribution Companies 2004-2013 

      Cheng, Xiaomei; Bjørndal, Endre; Lien, Gudbrand; Bjørndal, Mette (Discussion paper;27/15, Working paper, 2015-10-07)
      Norwegian distribution companies have been subjected to an incentive regulation scheme from 1997, and the efficiency incentives were further strengthened with the introduction of yardstick regulation in 2007. We examine ...