The scientific monograph presents general characterization of macroeconomic modelling and provides an overview of the most prominent world-renown econometric models. Analysis includes the study of the theoretical basis and the areas of model application, model structure and maintenance of the data basis and software. The general structure of the model, relationships included in the model and the overall logic of calculations are considered in the work in great detail. The logical and statistical basis of the behavioural equations is provided. These equations are used for modelling of GDP, prices and wages, balance of payments and foreign trade, employment, fiscal sector and energy sector relations. The work provides a detailed overview of the application of macroeconomic models in Latvia and presents forecasts of the macroeconomic indicators of Latvia.