Principles of Microeconomics / Edition 6

by N. Gregory Mankiw

Overview

With its clear and engaging writing style, PRINCIPLES OF MICROECONOMICS, Sixth Edition, continues to be one of the most popular books on economics available today. Mankiw emphasizes material that you are likely to find interesting about the economy (particularly if you are studying economics for the first time), including real-life scenarios, useful facts, and the many ways economic concepts play a role in the decisions you make every day.

Product Details

ISBN-13:	9780538453042
Publisher:	Cengage Learning
Publication date:	02/07/2011
Series:	MindTap Course List
Edition description:	Older Edition
Pages:	528
Product dimensions:	8.40(w) x 9.90(h) x 0.80(d)
Lexile:	1210L (what's this?)

About the Author

N. Gregory Mankiw is the Robert M. Beren Professor of Economics at Harvard University. For 14 years he taught EC10 Principles, the most popular course at Harvard. Dr. Mankiw studied economics at Princeton University and MIT. He 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. Dr. Mankiw's articles have appeared in academic journals such as the American Economic Review, Journal of Political Economy and Quarterly Journal of Economics. His work has also appeared 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, Dr. Mankiw 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

Part I: INTRODUCTION. 1. Ten Principles of Economics. 2. Thinking Like an Economist. Appendix: Graphing: A Brief Review. 3. Interdependence and the Gains from Trade. Part II: SUPPLY AND DEMAND I: HOW MARKETS WORK. 4. The Market Forces of Supply and Demand. 5. Elasticity and Its Application. 6. Supply, Demand, and Government Policies. Part III: SUPPLY AND DEMAND II: MARKETS AND WELFARE. 7. Consumers, Producers, and the Efficiency of Markets. 8. Application: The Costs of Taxation. 9. Application: International Trade. Part IV: THE ECONOMICS OF PUBLIC SECTOR. 10. Externalities. 11. Public Goods and Common Resources. 12. The Design of the Tax System. Part V: FIRM BEHAVIOR AND THE ORGANIZATION OF INDUSTRY. 13. The Costs of Production. 14. Firms in Competitive Markets. 15. Monopoly. 16. Monopolistic Competition. 17. Oligopoly. Part VI: THE ECONOMICS OF LABOR MARKETS. 18. The Markets for the Factors of Production. 19. Earnings and Discrimination. 20. Income Inequality and Poverty. PART VII: TOPICS FOR FURTHER STUDY. 21. The Theory of Consumer Choice. 22. Frontiers in Microeconomics. Glossary. Index.

Editorial Reviews

"I think it is more reader friendly than other texts. In addition, it uses both numeric and/or graphical examples, which is very useful for the students."

"We used to use Case and Fair's text. Mankiw seems to be a better text because it actually follows through with giving applications to what he includes in the book. For example, there is much better material in Mankiw about consumer surplus, producer surplus, government policies and interventions in the market."

"Very student friendly text. Makes economics easy to understand. Some of the other texts would take a lot of reading to explain an idea."

From the Publisher