This essay develops the "concept of stocks" – a conceptual notion designed to enable a clearer understanding of the interaction between the dynamics of ecosystems and the economy. The notion of stocks is formulated in a general manner based on set theory. The central attribute of a stock is...

Land is an essential but limited natural resource. We employ the concept of stocks to analysedriving forces for land-use conversion and to assess, whether the German political “30-hectares-goal” is feasible given the current institutional setting. In this paper major drivingforces for...

One of the major scientific challenges posed by the EU Water Framework Directive (WFD) is the de-sign of a decision support process that meets the directive's requirement to achieve good status using a cost-effective combination of measures. This paper presents BASINFORM, a new decision tool for...