If the marginal propensity to consume in a municipality is 0.8, what is the value of the simple multiplier? If a new stadium that adds $30 million in new consumption expenditures is built, what is the impact on the economy based on this multiplier? Suppose the Marginal Propensity to Import is 0.2, what happens to the multiplier and to the impact on the economy?

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.