Model Structure

Provide a description and/or references pertaining to: the conceptual model, a list of key variables and/or parameters, the model structure, and governing equations:
FASOMGHGs key endogenous variables include: commodity and factor prices, production, consumption, export and import quantities, land use allocations between sectors, management strategy adoption, resource use, economic welfare measures, producer and consumer surplus, transfer payments, net welfare effects, environmental impact indicators, GHG emission/absorption of carbon dioxide (CO2), methane (CH4), and nitrous oxide (N2O) surface, subsurface, and groundwater pollution for nitrogen, phosphorous, and soil erosion. FASOMGHG is dynamic in that it solves for the simultaneous multi-market, multi-period equilibrium across all agricultural and wood product markets, and for all time periods within the specified time horizon. Thus it produces an intertemporal, intersectoral land market dynamic equilibrium. FASOMGHG embodies a nonlinear objective function, representing the sum of producers and consumers surpluses in all of the included product and factor markets. It is price-endogenous because the prices of the products produced and the factor inputs used in the two sectors are determined in the model solution. Finally, FASOMGHG is a mathematical programming model because it uses numerical optimization techniques to find the multi-market price and quantity vectors that simultaneously maximize the value of an objective function, subject to a set of constraints.