For quite a long time, network industries used to be regarded as (natural) monopolies. This was due to these industries having some special characteristics. Network externalities and economies of scale in particular justified the (natural) monopoly thesis. Recently, however, a trend towards...

The aim of this arti cle is to show that the New Insti tuti onal Economics is an interdisciplinary stream combining economics, law, organizati on theory, politi cal sciences, sociology, and anthropology. The main theories which are part of the New Insti tuti onal Economics are: Agency Theory,...