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Input/Output Models and Forest Resource Constraints: A Comment

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Abstract:

Input/output (I/O) analysis has been used to study regional impacts of timber supply increases. Two types of I/O models exist, the conventional demand-driven model and the more obscure supply-driven model. Contrary to a suggestion by Schallau and Maki (1983), results of these two models cannot be compared to gain useful information about different types (endogenous or exogenous) of public timber supply changes. This is demonstrated by a simple example in which a timber supply increase of the same type (that is, endogenous or exogenous) is used to drive each model. Quite different results are obtained, due to the diametrically opposed assumptions of the two models. When comparing endogenous and exogenous changes, analysts should make an ex ante choice between the two models, not use them both; some guidelines for making this choice are suggested. Forest Sci. 32:397-401.

Keywords: Timber supply; endogenous/exogenous

Document Type: Commentary

Affiliations: Ph.D. Student, Yale School of Forestry and Environmental Studies, 205 Prospect Street, New Haven, CT 06511

Publication date: June 1, 1986

More about this publication?
  • Forest Science is a peer-reviewed journal publishing fundamental and applied research that explores all aspects of natural and social sciences as they apply to the function and management of the forested ecosystems of the world. Topics include silviculture, forest management, biometrics, economics, entomology & pathology, fire & fuels management, forest ecology, genetics & tree improvement, geospatial technologies, harvesting & utilization, landscape ecology, operations research, forest policy, physiology, recreation, social sciences, soils & hydrology, and wildlife management.
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