Computable General Equilibrium (CGE) of Multiregion Input-Output Model
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This Demonstration is a neoclassical computable general equilibrium (CGE) model that shows how economic growth occurs with the liberalization of trade.
Contributed by: Stuart Nettleton (June 2011)
Open content licensed under CC BY-NC-SA
David Ricardo (1817)  proposed that economic welfare (as measured by domestic consumption) would grow through international trade as a result of participating countries specializing in their respective comparative advantages. Neoclassical economists have developed computable general equilibrium (CGE) models of markets for situations where demand and supply are interdependent in order to analyze growth through trade and the benefits of trade agreements. Paul Samuelson  showed that optimization could be used to solve such models, in particular John Von Neumann's economic equations developed in 1938. Recently multiregional input-output models have become popular as networked production functions for use in solving the dynamics of growth through trade. ten Raa  originated a new type of input-output model based on the make minus use tables, which are prepared as part of constructing an input-output table.
This Demonstration shows the dynamics of growth through trade. Net make less use tables for economies in the Demonstration are randomly generated. The model is relatively simple, being only for one year, having labor as the sole factor of production, and excluding the usual aspects of capital, investment, and total factor productivity growth, as well as more recent considerations such as the asset intensity of production, balance of payments limits, and intertemporal environmental economic-geophysical interactions (such as global warming effects). However, the model is quite sophisticated in implementing tableau networked production functions across multiple industries in multiple countries, all interconnected by trade, settled simultaneously in volume and price through linear programming.
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 D. Ricardo, On the Principles of Political Economy and Taxation, 3rd ed., London: John Murray, 1817.
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 T. ten Raa, The Economics of Input-Output Analysis, Cambridge: Cambridge University Press, 2006.