This book provides an account of the Cambridge Multisectoral Dynamic Model, based on a highly disaggregated macroeconometric model. The first part covers the econometric theory and methodology, the organization of the data, the structure of the model, estimation and computer programming. The second part examines the modeling of different aspects of the system in detail and describes the relationships used, the parameter estimates and the results obtained. The model has been developed by the Cambridge Growth Project and is unique among models of the UK economy in its level of disaggregation.