Dear Edwin: I fully agree with Dr. Arne Heineman. Technical details of modelling do not show up in Agro. sys. Currently, I am working on a theoretical model that is relevant for a developing countries situation. I am trying to model socio-economic and environmental effects of agroforestry parctices in a computable general equilibrium framework. It may take for a while since I am busy with other projects. I think that existing models of resource economics are quite capable to model agroforestry issues. Of course you have to make appropriate modifications. Good luck Janaki Alavalapati Department of Rural Economy University of Alberta Edmonton, Canada
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