The production function is explaining the mechanism through which inputs are changed into outputs and the partial efficiency of labour and capital. It also allows for understanding the elasticity of substitution, which measures the percentage change in factor proportions due to a percentage...

Bucharest, the most important city of Romania with almost 2,5 millions of citizen and 800.000 cars, represent not only the Romanian capitale but the most pollutant city due to the road traffic.

Improving the performance of public sector is the goal that is high on the policy agenda in almost all industrialized countries. Policy makers in individual countries are increasingly aware of the need to know how they are doing relative to the competition. But, the measuring public performance...