Considers the solution of large systems of linear equations, such as those arising from a large linearized economic model. Recommends (a) that matrix inversion be avoided, in favour of LU methods; and (b) that sparsity in the system be exploited using special computer subroutines. Some examples...

Two large applied general equilibrium models, GTAP and MONASH, are used in this paper to simulate the elimination of trade barriers among the members of APEC. These models focus respectively on global trading relations and on the detailed sectoral, occupational, and regional dimensions of the...

The computer implementation of any large economic model is usually a very expensive and time consuming task. This paper describes a software package, called GEMPACK, which is being developed specifically to reduce dramatically the research time, effort and cost required to set up one solution...

This paper gives a brief overview of a new suite of software designed to make it relatively painless to implement large economic models, especially those in the computable general equilibrium (CGE) class. Whereas in the past a large element in the cost of building these models has been the...

GEMPACK is a suite of general-purpose economic modelling software especially suitable for general and partial equilibrium models. It can handle a wide range of economic behaviour and also contains a versatile method for solving intertemporal models. GEMPACK provides software for calculating...

This paper describes a practical and conceptually simple iterative method for solving large dynamic CGE models under rational expectations. Details are given for the MONASH model of Australia but the general approach could be applied to a wide range of dynamic models. The method has been...

Consider the following two opinions, both of which can be found in the literature of consumer demand systems: (a) As the real income of a consumer becomes indefinitely large, re-mixing the consumption bundle becomes irrelevant: having chosen the ultimately satisfying budget shares at any given...

To make CGE models realistic, we sometimes need to include inequality constraints (eg, import quotas) or non-differentiable functions (eg, income tax schedules). Both situations may be described using complementarity conditions, which state that either an equation is true or its complementary...

The past few years have seen increasing use of multiregional and intertemporal (that is, forward-looking) applied general equilibrium (AGE) models. These models share the characteristic of rapidly expanding dimensions. Because multilateral trade models increase in size with the square of the...

When a general equilibrium model is solved, there are often a large number of exogenous shocks. The change in each endogenous variable obviously depends on these different shocks. We point out a natural way of decomposing the changes (or percentage changes) in the endogenous variables as sums of...