Browsing by Author "Philip L. Tedder"

Now showing 1 - 4 of 4
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    A Comprehensive Examination of Economic Harvest Optimization Simulation Methods
    (1981) James S. Schmidt; Philip L. Tedder
    The simulation algorithms that determine a harvest trajectory based on supply and demand—Economic Harvest Optimization (ECHO) and the present net worth (PNW) option of the Timber Resource Economic Estimation System—appear to offer reasonable approximations of optimal harvest regimes and to approach stable harvests. The two versions differ primarily in the calculation of growth on the marginal acre and in the way the algorithms iterate to a feasible solution. The impact of commercial thinning, shifting demand curves, and multiple sites and species is discussed relative to the capability of the algorithms to achieve optimality and stability. FOREST Sci. 27:523-536.
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    Impacts of Federal Estate Taxation on Investments in Forestry
    (1979-11) Charles F. Sutherland; Philip L. Tedder
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    A Recursive Approach to Include Complex Demand Equations in Economic Harvest Scheduling
    (1980-09) Philip L. Tedder
    The two current algorithms for harvest scheduling are based on a downward sloping linear demand curve that uses a simple demand for stumpage equation including only the quantity demanded and the own price as variables. This paper presents the economics and theoretical reasoning for including additional variables in the demand for stumpage equation. The linkage equation is redeveloped to include these variables over time. FOREST Sci. 26:369-373.
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    Regeneration Delay:Economic Cost and Harvest Loss
    (1982-01) Douglas Brodie, J.; Philip L. Tedder
    Failure to regenerate stands immediately after harvest results in losses of value and volume yield. The amount of loss differs when the effect of delay is assessed for an individual stand or forestwide. For the forest, the loss will depend on methods of determining the allowable cut and on inventory age-class distributions. A regeneration delay that results from transitory physical or budgeting constraints will have a different effect than delays programmed into all future rotations. Losses that appear massive when assessed at the stand level may have little effect on the allowable cut, while failure to rapidly regenerate stands that are economically marginal may greatly affect allowable cut on some forests.