The purpose of this chapter[1] is to formulate a numerical general equilibrium model of the Swedish economy, and to use the model for a quantitative evaluation of the pattern of comparative advan-tages. The model is essentially a Leontief type of input-output model, extended with linear demand functions for final com-modities, foreign trade activities and capacity and resource constraints. Due to the linearity the model can easily be reformulated and solved as a quadratic programming model. The evaluation of the pattern of comparative advantages of the Swedish economy is carried out as an analysis of the choice between import and domestic production in a temporary equilibrium framework with exogenously given world market prices, exports and domestic production capacities.