Modeling Long-term Commodities: the Development of a Simulation Model for the South African Wine Industry within a Partial Equilibrium Framework

Econometric demand and supply models of agricultural commodities and crops have been around for a long time with extensive research and adaptations being made in the grain and livestock sectors. This much attention has, however, not been afforded to long term commodities. This paper presents a partial equilibrium framework for modeling long term commodities using the South African wine industry as an example. The model structure is presented and two different approaches to closing the model are compared. The usefulness of the model is tested in the form of baseline projections and the analysis of a typical “what if” question. (JEL Classification: D5, L66, Q11)