Our paper deals with empirical and technical problems to derive (conventional) cost functions in banks and other financial institutions. One main reason is based on the still ongoing discussion on inputs and outputs of financial intermediaries. A second obstacle is due to the fact that most of...

Water utilities in developing countries face a challenge in maintaining the existing supply and extending the supply of pipe-borne water to rural areas in face of growing demand. Understanding the cost structure is important for developing the pricing policies, regulating the market structure...

Potable water supply in Germany is highly fragmented. A consolidation of the industry could, therefore, lead to lower cost of water supply and price savings for the customers. In this paper we estimate a total cost function for potable water supply based on a unique sample of German water...