The 1993 timber assessment market model: structure, projections, and policy simulations.

Abstract

ErrataThis errata is to correct error made on page 16, fourth paragraph down. Paragraph should read as follows:Stumpage demand and product recovery and conversion-Given the constrained form of the production functions in equation (11), the derived demand for stumpage is simply (apply Hotelling's lemma to equation (15) The 1993 timber assessment market model (TAMM) is a spatial model of the solidwood and timber inventory elements of the U.S. forest products sector. The TAMM model provides annual projections of volumes and prices in the solidwood products and sawtimber stumpage markets and estimates of total timber harvest and inventory by geographic region for periods of up to 50 years. TAMM and its companion models that project pulpwood and fuelwood use were developed to support the quinquennial Resource Planning Act (RPA) timber assessments and assessment updates conducted by the USDA Forest Service. This report summarizes the methods used to develop the various components of TAMM and the estimates of key behavioral parameters used in the TAMM structure, and also illustrates the use of TAMM with a base and several scenario projections.

GHG Mitigation Potential, Costs and Benefits in Global Forests: A Dynamic Partial Equilibrium Approach

“…The supply of timber was assumed to be much more inelastic, +0.5 (Adams, et al, 1986;Adams and Haynes, 1980). In this analysis we used the US forestland supply price elasticity, 0.25, and applied it to all regions over the 100-year horizon, since few studies of such elasticities exist.…”

The potential effects of climate change on U.S. forests: a review

“…They used a biogeochemistry model (Terrestrial Ecosystem Model;McGuire et al 1992) to project changes in forest productivity for broad ecosystem types, in response to 4 GCM predictions of future climate. Percent changes in net primary productivity (NPP) from TEM were translated to changes in net forest growth in the TAMM/ ATLAS forest sector model (Adams & Haynes 1980). TEM is one of the 3 biogeochemistry models used in the Vegetation/Ecosystem Modeling and Analysis Project study (VEMAP Members 1995).…”

The 1993 RPA timber assessment update

“…These prices and the associated equilibrium timber supply-demand projections were developed by means of regionally desegregated economic simulation models. For further details, see: Adams and Haynes (1980), Haynes and Adams (1985) and Binkley and Cardellichio (1986). facturing (furniture), a slow increase in the proportion of hardwoods is expected.…”

“…(Kallio et al 1987). 3The original model is described in Adams and Haynes (1980) and Haynes and Adams (1985).…”