The relationship between a pure-strategy nash equilibrium and a dominant-strategy equilibrium is that: a. a dominant-strategy equilibrium is a special case of a pure-strategy nash equilibrium. b. a pure-strategy nash equilibrium is a special case of a dominant-strategy equilibrium. c. they are mutually exclusive and exhaustive, in that a dominant-strategy equilibrium is the same thing as a mixed-strategy nash equilibrium. d. there may not be a dominant-strategy equilibrium, but there always is a pure-strategy nash equilibrium. they are the same.

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.

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