Tourism is one of the most important growth leading sectors in the world's economy. However, economies endowed with beautiful natural sites do always face a trade-off in the management of these resources. The problem is then to find an equilibrium point between utilisation and conservation of...

In this paper we suggest an structural model that specifies firm growth as a function of firm specific parameters and of competition for purchase power with other firms on a given market. Moreover, we explicitely model firms? innovative behaviour and distinguish between dierent innovation...

The search for frameworks and indicators of sustainable development has taken a prominent place in this journal. However, some specific aspects have received little or no attention, notably the spatial dimension and the role of international trade in indicator development. Moreover, many...