The London Business School econometric model of the UK

This paper describes the London Business School econometric model — the first fully computerized model of the UK — which has been used for regular public forecasting since 1966. The model, estimated on quarterly data, is organized around the income expenditure accounts with a fully integrated flow of funds sector which ensures consistency between portfolio decisions and income, savings and investment decisions. Aggregate demand is built up from its individual components so that demand influences are important for the short- and medium-term behaviour of the model. But there are important supply-side effects which work through the real exchange rate and real wages. Monetary conditions have a powerfull effect on the model through the exchange rate, personal sector wealth and interest rates. Wages and employment are determined in a labour market in which employment decisions depend on the level of demand and real wages while real wages depend on the level of unemployment, real benefits and direct and indirect taxes as well as underlying trends in productivity. Asset prices move in any period to clear both the spot and the future market in assets so that current asset prices in the equity, gilt-edged and foreign exchange markets reflect all current information about the expected state of the economy. In contrast, goods prices adjust sluggishly. The combination of continuously clearing asset markets and sluggish wages and prices gives the model many of the theoretical characteristics associated with the open-economy models of Dornbusch and Buiter and Miller.