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  1. No Access

    Article

    Productivity change in the water industry in England and Wales: application of the meta-Malmquist index

    This paper uses a meta-Malmquist index for measuring productivity change of the water industry in England and Wales and compares this to the traditional Malmquist index. The meta-Malmquist index computes produ...

    M C A S Portela, E Thanassoulis… in Journal of the Operational Research Society (2011)

  2. No Access

    Article

    An improvement on the Tracy and Chen model ‘A generalized model for weight restrictions in DEA’

    Recently Tracy and Chen presented a parametric DEA model (PDEA) to assess relative efficiency in the presence of a generalized form of linear weight restrictions. This paper proposes a modification to the PDEA...

    M Khalili, A S Camanho, M C A S Portela… in Journal of the Operational Research Society (2010)

  3. No Access

    Article

    Analysis of complementary methodologies for the estimation of school value added

    This paper analyses the value added (VA) of a sample of Portuguese schools using two methodologies: data envelopment analysis (DEA) and the methodology used presently by the UK Department for Children, Schools...

    M C A S Portela, A S Camanho in Journal of the Operational Research Society (2010)

  4. No Access

    Article

    Develo** a decomposable measure of profit efficiency using DEA

    In for-profit organizations efficiency measurement with reference to the potential for profit augmentation is particularly important as is its decomposition into technical, and allocative components. Different...

    M C A S Portela, E Thanassoulis in Journal of the Operational Research Society (2007)