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Cengage Learning
Principles of Microeconomics / Edition 7

Principles of Microeconomics / Edition 7

by N. Gregory Mankiw


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Product Details

ISBN-13: 2901285165904
Publisher: Cengage Learning
Publication date: 01/01/2014
Series: Mankiw's Principles of Economics Series
Edition description: Older Edition
Pages: 520
Product dimensions: 8.40(w) x 9.90(h) x 0.40(d)

About the Author

N. Gregory Mankiw is Robert M. Beren Professor of Economics at Harvard University. He studied economics at Princeton University and MIT. Dr. Mankiw is a prolific writer and a regular participant in academic and policy debates. His research includes work on price adjustment, consumer behavior, financial markets, monetary and fiscal policy, and economic growth. His published articles have appeared in academic journals, such as the American Economic Review, Journal of Political Economy, and Quarterly Journal of Economics, and in more widely accessible forums, including The New York Times, The Washington Post, The Wall Street Journal, and Fortune. Dr. Mankiw has been a research associate of the National Bureau of Economic Research, an adviser to the Federal Reserve Bank of Boston and the Congressional Budget Office, and a member of the ETS test development committee for the advanced placement exam in economics. From 2003 to 2005, he served as chairman of the President's Council of Economic Advisers.

Read an Excerpt

Chapter 1: Ten Principles Of Economics

The word economy comes from the Greek word for "one who manages a household." At first, this origin might seem peculiar. But, in fact, households and economies have much in common.

A household faces many decisions. It must decide which members of the household do which tasks and what each member gets in return: Who cooks dinner? Who does the laundry? Who gets the extra dessert at dinner? Who gets to choose what TV show to watch? In short, the household must allocate its scarce resources among its various members, taking into account each member's abilities, efforts, and desires. Like a household, a society faces many decisions. A society must decide what jobs will be done and who will do them. It needs some people to grow food, other people to make clothing, and still others to design computer software. Once society has allocated people (as well as land, buildings, and machines) to various jobs, it must also allocate the output of goods and services that they produce. It must decide who will eat caviar and who will eat potatoes. It must decide who will drive a Porsche and who will take the bus.

The management of society's resources is important because resources are scarce. Scarcity means that society has less to offer than people wish to have. just as a household cannot give every member everything he or she wants, a society cannot give every individual the highest standard of living to which he or she might aspire.

Economics is the study of how society manages its scarce resources. In most societies, resources are allocated not by a single central planner but through the combined actions of millions of households and firms. Economists therefore study how people make decisions: how much they work, what they buy, how much they save, and how they invest their savings. Economists also study how people interact with one another. For instance, they examine how the multitude of buyers and sellers of a good together determine the price at which the good is sold and the quantity that is sold. Finally, economists analyze forces and trends that affect the economy as a whole, including the growth in average income, the fraction of the population that cannot find work, and the rate at which prices are rising.

Although the study of economics has many facets, the field is unified by several central ideas. In the rest of this chapter, we look at Ten Principles of Economics. These principles recur throughout this book and are introduced here to give you an overview of what economics is all about.

How People Make Decisions

There is no mystery to what an "economy" is. Whether we are talking about the economy of Los Angeles, of the United States, or of the whole world, an economy is just a group of people interacting with one another as they go about their lives. Because the behavior of an economy reflects the behavior of the individuals who make up the economy, we start our study of economics with four principles of individual decisionmaking.

Principle #1: People Face Tradeoffs

The first lesson about making decisions is summarized in the adage: "There is no such thing as a free lunch." To get one thing that we like, we usually have to give up another thing that we like. Making decisions requires trading off one goal against another.

Consider a student who must decide how to allocate her most valuable resource-her time. She can spend all of her time studying economics; she can spend all her time studying psychology; or she can divide her time between the two fields. For every hour she studies one subject, she gives up an hour she could have used studying the other. And for every hour she spends studying, she gives up an hour that she could have spent napping, bike riding, watching TV, or working at her part-time job for some extra spending money.

Or consider parents deciding how to spend their family income. They can buy food, clothing, or a family vacation. Or they can save some of the family income for retirement or the children's college education. When they choose to spend an extra dollar on one of these goods, they have one less dollar to spend on some other good.

When people are grouped into societies, they face different kinds of tradeoffs. The classic tradeoff is between "guns and butter." The more we spend on national defense to protect our shores from foreign aggressors (guns), the less we can spend on personal goods to raise our standard of living at home (butter). Also important in modern society is the tradeoff between a clean environment and a high level of income. Laws that require firms to reduce pollution raise the cost of producing goods and services. Because of the higher costs, these firms end up earning smaller profits, paying lower wages, charging higher prices, or some combination of these three. Thus, while pollution regulations give us the benefit of a cleaner environment and the improved health that comes with it, they have the cost of reducing the incomes of the firms' owners, workers, and customers. Another tradeoff society faces is between efficiency and equity. Efficiency means that society is getting the most it can from its scarce resources. Equity means that the benefits of those resources are distributed fairly among society's members. In other words, efficiency refers to the size of the economic pie, and equity refers to how the pie is divided. Often, when government policies are being designed, these two goals conflict.

Consider, for instance, policies aimed at achieving a more equal distribution of economic well-being. Some of these policies, such as the welfare system or unemployment insurance, try to help those members of society who are most in need. Others, such as the individual income tax, ask the financially successful to contribute more than others to support the government. Although these policies have the benefit of achieving greater equity, they have a cost in terms of reduced efficiency. When the government redistributes income from the rich to the poor, it reduces the reward for working hard; as a result, people work less and produce fewer goods and services. In other words, when the government tries to cut the economic pie into more equal slices, the pie gets smaller. Recognizing that people face tradeoffs does not by itself tell us what decisions they will or should make. A student should not abandon the study of psychology just because doing so would increase the time available for the study of economics. Society should not stop protecting the environment just because environmental regulations reduce our material standard of living. The poor should not be ignored just because helping them distorts work incentives. Nonetheless, acknowledging life's tradeoffs is important because people are likely to make good decisions only if they understand the options that they have available.

Principle #: The Cast of Something Is

What You Give Up to Get !

Because people face tradeoffs, making decisions requires comparing the costs and benefits of alternative courses of action. In many cases, however, the cost of some action is not as obvious as it might first appear. Consider, for example, the decision whether to go to college. The benefit is intellectual enrichment and a lifetime of better job opportunities. But what is the cost? To answer this question, you might be tempted to add up the money you spend on tuition, books, room, and board. Yet this total does not truly represent what you give up to spend a year in college...

Table of Contents

1.Ten Principles of Economics
2.Thinking Like an Economist. Appendix: Graphing: A Brief Review
3.Interdependence and the Gains from Trade.
4.The Market Forces of Supply and Demand
5.Elasticity and Its Application
6.Supply, Demand, and Government Policies.
7.Consumers, Producers, and the Efficiency of Markets
8.Application: The Costs of Taxation
9.Application: International Trade.
11.Public Goods and Common Resources
12.The Design of the Tax System.
13.The Costs of Production
14.Firms in Competitive Markets
17.Monopolistic Competition.
18.The Markets for the Factors of Production
19.Earnings and Discrimination
20.The Distribution of Income.
21.The Theory of Consumer Choice.

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Principles of Microeconomics / Edition 7 1 out of 5 based on 0 ratings. 1 reviews.
Anonymous More than 1 year ago
Less then unhappy with this book and my experience with it. I Ordered a bound copy and got a loose leaf copy. The book doesn't really explain anything. For someone who has no knowledge of economics to purchase this book for understanding is very difficult. It speaks in technical terms with calculations that make no sense and it doesn't explain how those determinations were made or the proper way to read the charts/graphs or give an understanding as to what they represent. I would not recommend this book to any one who wants to understand economics. I have learned more from google with a better sense of understanding. Call before you rent to ensure you are going to get the item rented. Return labels are not under the account tabs but under manage your account under the account tab. Nothing Is explained so I wish you luck with trying to figure it out.