Computers and the construction of economic models

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Abstract
Input/output tables are a set of economic accounts which can be transformed into models for analysing and projecting the economy. The first set of input/output tables for Scotland has recently been published. They were constructed using a computer as a principal tool. This paper describes the project, the programs and the lessons that have been learned and shows how problems could have been avoided as well as how they were overcome. Although the paper is mainly about the Scottish input/output project many of the points are relevant to the more general use of computers in data surveys and economic studies. Only when computer scientists and economists understand the limitations of each other's disciplines can they fully realise the benefits which computers can bring.

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