One of the key features of our economies consists of the coexistence of different technologies supplying similar products and services. We often observe that an old technology is improved when a new one appears; behind this process of improvement often lies an intentional research activity....

In this paper we draw an analogy between the process of learning-bydoing and the learning process which develops in a neural network context. The bridging tool we refer to is a dynamic production function whose only variable input is labour. By concentrating on the 'neural network production...

When firms enjoy increasing returns in presence of a high rate of innovation, competition may obtain due to the continuous changes in demand and cost conditions even when there is no differentiation and the products of competing firms are essentially homogeneous. In this paper we intend to...