Metafrontier frameworks for the study of firm-level efficiencies and technology ratios

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Energy efficiency and production technology heterogeneity in China: A meta-frontier DEA approach (2013, methodology): “Since GEE and MEE are measured based on group frontier and meta-frontier, respectively, and the production technology of the group frontier is a sub-set of the meta-frontier (T ⊆ T) (O'Donnell et al., 2008), MEE ≤ GEE always holds.”
A new approach to estimating the metafrontier production function based on a stochastic frontier framework (2014, methodology): “For a more detailed description of the input/output variables in our empirical application, please see O’Donnell et al. (2008). 246 J Prod Anal (2014) 42:241–254”
Sources of inefficient power generation by coal-fired thermal power plants in China: A metafrontier DEA decomposition approach (2020, background): “[9]; the regional gap in efficiency can be estimated by measuring the distance between the metafrontier consisting of the pooled data and group frontiers, which are unique to each regional group.”
Decomposition of the environmental inefficiency of the meta-frontier with undesirable output (2012, methodology): “Results and analysis The meta-technology ratio and environmental efficiency of the meta-frontier and group frontiers are estimated for the 90 countries in each of the 5 years (O’Donnell et al., 2008).”