Suppose the economy is self-regulating, the price level is 210, the quantity demanded of Real GDP and the quantity supplied of Real GDP in the short run both equal $9.7 trillion, and the quantity supplied of Real GDP in the long run is $10.2 trillion. Given all of this information, we can conclude the economy in short run equilibrium and that the price level in the long run equilibrium will be than 210.

The business cycle is the periodic but irregular up-and-down movement in economic activity, measured by fluctuations in real gross domestic product (gdp) and other macroeconomic variables. a business cycle is typically characterized by four phases—recession, recovery, growth, and decline—that repeat themselves over time. economists note, however, that complete business cycles vary in length. the duration of business cycles can be anywhere from about two to twelve years, with most cycles averaging six years in length. some business analysts use the business cycle model and terminology to study and explain fluctuations in business inventory and other individual elements of corporate operations. but the term "business cycle" is still primarily associated with larger (industry-wide, regional, national, or even international) business trends.