Economists, mathematicians, statistics specialists have given rise to an actual theory of economic growth that makes up the background for the interdisciplinary theory of economic modeling, by founding and drawing up static or dynamic models, economic-mathematical or economic-environmental...

The paper presents a new method to solve DSGE models with a great number of heterogeneous agents. Using tools from systems and control theory, it is shown how to reduce the dimension of the state and the policy vector so that the reduced model approximates the original model with high precision....