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...

This paper describes a method for introducing more regional detail into an applied general equilibrium model than is available from the top-down approach to disaggregation. Recognizing that the complete set of inter-regional accounts is rarely available, the method described uses available data...