This paper discusses the concept of 'externalities '. It starts with a brief discussion of market failures in the neoclassical economic framework. It then proceeds to a definition of externalities, thereby distinguishing external effects from other sorts of 'unpriced effects '. Finally, some...

The point of departure is that the activities associated with the Internet are organizational and societal activities taking place within a given historical context. As such they can profit from sociological theories such as postmodernism. Postmodernism can be seen as a reaction to some signal...

This paper emphasises the need for adequate travel information as a policy tool to increase the service level of urban public transport. Particular attention is given to the role and competence of public authorities in offering proper travel information systems. Two elements in particular are...