Please use this identifier to cite or link to this item: http://hdl.handle.net/10419/23295
Authors: 
Eichner, Thomas
Pethig, Rüdiger
Year of Publication: 
2004
Series/Report no.: 
Volkswirtschaftliche Diskussionsbeiträge / Universität-Gesamthochschule-Siegen, Fachbereich Wirtschaftswissenschaften 116
Abstract: 
In an integrated economy-ecosystem model humans choose their land use and leave the residual land as habitat for three species forming a food chain. The size of habitat determines the diversity and abundance of species. That biodiversity generates, in turn, a flow of ecosystem services with public-good characteristics for human consumption. The ecosystem submodel yields (rather than assumes!) population growth functions with each species' growth depending on the size of habitat. First the relationship between habitat and species growth (sustenance, decline and extinction) is explored. The laissez-faire economy is shown to result in an underprovision of habitat, making the case for land use restrictions for nature protection. The optimal land use policy is characterized with full regard of ecosystem dynamics. Finally, labor-augmenting technical change is introduced to generate ever increasing pressure towards further habitat reductions. In the laissez-faire economy the habitat is consequently squeezed to zero in the long-run so that all species are doomed. Social optimality demands, however, to refrain from using all land for economic purposes despite ever-growing labor productivity.
Subjects: 
land use
ecosystem dynamics
biodiversity
ecosystem services
JEL: 
Q24
Q57
Document Type: 
Working Paper

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