Using models of economic dynamics, the behavior of the economic system over time is studied. The book explores in detail one of the main technological models of dynamics - the Neumann-Gale model, as well as some of its generalizations. Particular attention is paid to optimal (efficient) trajectories. In particular, the trunk theorems on the asymptotics of these trajectories and the characterization theorems (on the presence of dual estimates) are stated. A complete description of the equilibrium states of the Neumann-Gale model is given.