Abstract. Cyclic economic development results from the available and current changes in the balance between supply and demand in the goods market that disturb the equilibrium, which is recovering at time constant rhythms during self-regulation by the market system of the number of employees in production on market conditions in consumer demand. It is shown that the observed Kondratieff waves measured in the real value of the existing capital and production are its time schedules.

Keywords: economy, market, cycles, demand, supply, equilibrium, crisis, environment, labor, capital, money, reproduction, investments, inflation.