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...

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...

Competition policy is an important tool of governments to establish functioning markets, particularly in the scope of liberalizing the energy sector. An examination of horizontal divestitures in several markets suggests that in appropriate cases divestiture can enhance competition in the...