Economic incentives for sustainable management: a small optimal control model for tropical forestry.
1999
Bach, C. F.
The paper evaluates different policy options for promoting low-impact logging through the use of economic incentives. To do this it constructs a small optimal control theory model within an integrated framework including both the biological and the economic implications of timber extraction. The approach uses detailed stock, yield and cost data from Ghana (gathered through a survey during September 1994). A numerical solution is reached by the use of multi-period non-linear optimization. Direct subsidies to low-impact logging activities through area-dependent subsidies are found to be far more efficient than subsidizing prices of tropical timber. The model takes a novel approach in combining growth and stock in a tropical forest area with the cost and damage connected with timber extraction, and allows an analysis of the interactions between stock, growth, timber extraction, logging damage and operating costs in an integrated manner.
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