In this paper modelling time series by single hidden layer feedforward neural network models is considered. A coherent modelling strategy based on statistical inference is discussed. The problems of selecting the variables and the number of hidden units are solved by using statistical model...

This paper goes through four case studies of the water sector concessions to the private sector in Brazil. The analysis comprises mainly the pricing policies, the impact of the auction modeling on future tariffs and regulation practices. The main conclusions are that the pricing policies are...

This paper considers price setting in pure units of account, linked to the means of payment through managed parities. If prices are sticky in the units in which they are set, parity changes may facilitate equilibrium adjustment of relative prices. The paper derives simultaneously the optimal...