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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.

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This file was created by scanning the printed publication.Errors identified by the software have been corrected; however, some errors may remain. AcknowledgementsThis Update required help from a group of dedicated individuals. Henry Spelter (FPL) updated the product demand relations; Ken Skog (FPL) updated the fuelwood projections, Peter Ince (FPL) provided the various fiber demands for the pulp sector; Robert Phelps (WO) helped with projections of the macroeconomic variables and determinants of end use activity; Bill Luppold (NE) revised hardwood lumber production and trade data; Tom Farrenkopf (PNW), Joanne Faulkner (SO), John Kelly (SO), Ray Sheffield (SE), and Sharon Woudenberg (IN) provided PIA inventory data for updating the ATLAS input decks. Jonna Kincaid (University of Washington) and Eric Jensen (University of Montana) provided outstanding programming assistance. Finally, Judy Mikowski (PNW) helped assemble input files, complied various output summaries, and provided valuable assistance in preparing this draft.

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