This major book presents, for the first time, an authoritative history of developments in macroeconometric modelling since the 1930s. It focuses in particular on the construction of mathematico-statistical models of entire economies, estimated from national accounts and other macroeconomic data. International and comparative in scope, the book contains chapters prepared by specialists from the different countries concerned. This landmark book is indispensable to an understanding of the history and development of large scale econometric models of modern economies.