Most oil-producing countries have now nationalised their oil reserves and are pursuing their own pricing and marketing policies; in recent years some of them have attempted to extend their influence over the oil market by undertaking processing activities downstream from oil production. What...

The paper surveys economic aspects of sustainability and the use of complex ecological systems. In a first step, an economist's view of the concept of sustainability is presented. Then, a simple model of the economic use of a dynamic ecological system is discussed. It is shown how economically...

Auf der Basis von Daten der Einkommens- und Verbrauchsstichprobe 1993 wird die Einkommenselastizität der Nachfrage nach Gesundheitsleistungen geschätzt. Dabei werden für privat und gesetzlich Krankenversicherte getrennte Schätzungen durchgeführt. Es zeigt sich, dass die...

This paper surveys the literature on the relationship between international trade in goods and the factors and the environment. Traditional approaches based on the Heckscher-Ohlin trade model and more recent models looking at non-competetive market structures are discussed. Moreover, the paper...

Social norms and intrinsic motivations lead to voluntary environmentally responsible behaviour even in the absence of environmental policy. The paper shows that the introduction of environmental policy may lead to a reduction of voluntary abatement and sometimes may increase emissions and...

This paper looks at a model in which two countries trade agricultural and manufactured commodities. The manufactured-goods sector produces with increasing returns to scale under conditions of monopolistic competition. It is shown that an increase in land endowment (or an increase in agricultural...