Part II: Application and Critical Thinking (20 points) 6. The four basic types of market structures are pure competition, monopoly, monopolistic competition, and oligopoly. Write a short essay that compares the four market structures based on the following characteristics:
Number of sellers and overall competition
Sellers' control over prices
Similarity of featured products
Difficulty of entering each market
(20 points)

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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