This paper examines the impact of endogenous deficit-balancing subsidies on the cost efficiency of local public bus companies by using alternative frontier cost models for panel data. Thereby, the multidimensional performance estimation incorporates the subsidy variable directly. The empirical...

We empirically demonstrate a practical approach of efficiency evaluation with limited data availability in some regulated industries. We apply PCA-DEA for radial efficiency measurement to U.S. natural gas transmission companies in 2007. PCA-DEA reduces dimensions of the optimization problem...

From an analysis of the available national allocation plans for the first period (2005-2007) of the EU emissions trading scheme (EU ETS), it can be inferred that (i) the total allocation to installations covered under the EU ETS is rather generous and (ii) most EU Member States ban the transfer...