Chapter 12: Problem 1
What are the three conditions for a market to be perfectly competitive?
Short Answer
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Key Concepts
These are the key concepts you need to understand to accurately answer the question.
Chapter 12: Problem 1
What are the three conditions for a market to be perfectly competitive?
These are the key concepts you need to understand to accurately answer the question.
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Get started for freeSuppose you decide to open a copy store. You rent store space (signing a 1-year lease to do so), and you take out a loan at a local bank and use the money to purchase 10 copiers. Six months later, a large chain opens a copy store two blocks away from yours. As a result, the revenue you receive from your copy store, while sufficient to cover the wages of your employees and the costs of paper and utilities, doesn't cover all your rent and the interest and repayment costs on the loan you took out to purchase the copiers. Briefly explain whether you should continue operating your business.
In \(2015,\) cocoa prices rose 13 percent from the previous year, the fourth straight year in which prices increased. However, by the end of 2016 cocoa prices fell. Edward George, the head of research at Ecobank, commented, "Everyone's like, wow. There's a lot of cocoa out there." Much of the world's supply of cocoa beans is grown in West Africa. a. Assume that the market for cocoa beans is perfectly competitive and was in long-run equilibrium in 2012 . Draw two graphs: one showing the world market for cocoa beans and one showing the market for the cocoa beans grown by a representative farmer. b. Assume that there was an increase in the worldwide demand for chocolate in \(2013 .\) In the graphs you drew in part (a), show the short-run effect of the demand increase. c. Explain why the supply of cocoa beans increased and the price decreased in \(2016 .\) Show the effect of this increase in supply on the graphs you drew in part (b).
An article in the Wall Street Journal discusses the visual effects industry, which is made up of firms that provide visual effects for films and television programs. The article noted, "Blockbusters ... often have thousands of visual effects shots. Even dramas and comedies today can include hundreds of them." But the article also noted that the firms producing the effects have not been very profitable. Some firms have declared bankruptcy, and the former general manager of one firm was quoted as saying, "A good year for us was a \(5 \%\) return." If demand for visual effects is so strong, why is it difficult for the firms that supply them to make an economic profit?
Hedrick Smith was a foreign correspondent for the New York Times who lived in the Soviet Union in the \(1970 \mathrm{~s}\), a period when the country had a planned economy rather than a market system. In a book he wrote about everyday life in the Soviet Union, Smith made the following observations about shopping in Moscow: At first it seemed \(\ldots\) that the stores were pretty well stocked. Only as we began to shop in earnest \(\ldots\) did the Russian consumer's predicament really come through to me. First, we needed textbooks for our children \(\ldots\) and found that the sixth-grade textbooks had run out.... We tried to find ballet shoes for our 11 -year-old daughter... only to discover that in this land of ballerinas, ballet shoes size 8 were unavailable in Moscow.... I tried to find shoes for myself. They were out of anything in my size but sandals or flimsy, lightweight shoes that the clerk, with one look at me, recommended against buying. "They won't last," he admitted. a. Judging by Smith's observations, briefly explain whether the Soviet Union achieved allocative efficiency in the production of sixth-grade textbooks, ballet shoes, and men's shoes. b. Can we tell from these observations whether the Soviet Union achieved productive efficiency in the production of sixth-grade textbooks, ballet shoes, and men's shoes? Briefly explain.
Suppose that each of the following is true: (1) The laptop computer industry is perfectly competitive, and the firms that assemble laptops do not also make the displays or screens; (2) the laptop display industry is also perfectly competitive; and (3) because the demand for laptop displays is currently relatively small, firms in the laptop display industry have not been able to take advantage of all the economies of scale in laptop display production. Use a graph of the laptop computer market to illustrate the long-run effects on equilibrium price and quantity in the laptop computer market of a substantial and sustained increase in the demand for laptop computers. Use another graph to show the effect on the cost curves of a typical firm in the laptop computer industry. Briefly explain your graphs. Do your graphs indicate that the laptop computer industry is a constant-cost industry, an increasing-cost industry, or a decreasing-cost industry?
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