What is the study of what people want and how they produce to obtain the goods and services they desire?

Scarcity is one of the key concepts of economics. It means that the demand for a good or service is greater than the availability of the good or service. Therefore, scarcity can limit the choices available to the consumers who ultimately make up the economy. Scarcity is important for understanding how goods and services are valued. Things that are scarce, like gold, diamonds, or certain kinds of knowledge, are more valuable for being scarce because sellers of these goods and services can set higher prices. These sellers know that because more people want their good or service than there are goods and services available, they can find buyers at a higher cost.

Índice Show

Consumers pursue their self-interest
Consumers want the most they can afford
Companies also pursue self-interest

Scarcity of goods and services is an important variable for economic models because it can affect the decisions made by consumers. For some people, the scarcity of a good or service means they cannot afford it. The economy of any place is made up of these choices by individuals and companies about what they can produce and afford.

The goods and services of any country are limited, which can lead to scarcity. Countries have different resources available to produce goods and services. These resources can be workers, government and private company investment, or raw materials (like trees or coal). Certain limits of scarcity can be balanced by taking resources from one area and using them somewhere else. Sellers like private companies or governments decide how the available resources are spread out. This is done by trying to strike a balance between what consumers need or want, what the government needs, and what will be an efficient use of resources to maximize profits. Countries also import resources from other countries, and export resources from their own.

Scarcity can be created on purpose. For example, governments control the printing of money, a valuable good. But, paper, cotton, and labor are all widely available across the world, so the things required to make money are not themselves scarce. If governments print too much money, the value of their money decreases, because it has become less scarce. When the supply of money in an economy is too high, it can lead to inflation. Inflation means the amount of money needed to buy a good or service increases—therefore money becomes less valuable, and the same amount of money can buy less over time than it could in the past. It is therefore in a country’s best interest to keep its paper money supply relatively scarce. However, sometimes inflation can help an economy. When money is less scarce, people can spend more, which triggers a rise in production. Low inflation can help an economy grow.

Economics is broadly divided into macroeconomics and microeconomics. The big picture, macroeconomics, concentrates on the behavior of a national or a regional economy as a whole: the totals of goods and services, unemployment and prices.

Then there’s a more detailed picture: the economic decisions that people and businesses make. Microeconomics analyzes behavior. It looks at how individuals and companies respond to incentives and allocate scarce resources efficiently.

People struggle to get as much as possible while spending as little as possible. The economist Thomas Sowell has said there is never enough of anything to fully satisfy all those who want it. This omnipresence of scarcity in our lives makes the study of human behavior compelling.

Microeconomics is divided into the theory of the consumer, which focuses on people’s behavior in market settings, and the theory of the firm, which concentrates on how businesses act, once again in market settings.

Consumers pursue their self-interest

In the 19th century, economists referred to consumers as “economic men” or homo economicus. Today they might call consumers economic people. All of these terms refer to the idea that individuals make decisions based upon the rational pursuit of their self-interest.

The meaning of self-interest is pretty clear, but it’s important to comprehend what economists mean by pursuing it rationally.

To an economist, behavior is rational if it helps attain goals. Economists do not pass moral judgment on a person’s goals. Behavior that may seem irrational to a non-economist is not necessarily so to an economist.

To see this, say that a man named Raj wants to rob a bank. Given that goal, economists would say that if Raj conducts surveillance on the bank to look for security cameras, that’s rational behavior — for Raj.

Or if a woman named Asha hates credit cards, economists pass no judgment on her thinking and would say that for her, it is rational to burn credit cards.

Consumers want the most they can afford

To buy anything, a consumer must interact with a producer — a seller — whether that seller is a mom and pop store or Amazon. Consumer theory says they examine prices because they are interested in getting those goods and services that will make their satisfaction as large as possible at the lowest possible price.

Microeconomists study that interaction mathematically in two ways. First, they try to gauge a consumer’s satisfaction level by assigning a number based on how much this consumer values the goods and services she chooses to buy in a market. They call this number utility.

Second, they interpret the act of seeking the most satisfaction as solving a maximization problem. In a maximization problem, a consumer seeks the biggest bang for their buck.

Therefore, the central problem in consumer theory is the study of how consumers go about maximizing their utility in market settings — buying as much of what they like with the money they have available.

What fascinates microeconomists studying utility maximization is that it nicely illustrates a central tension in economics: how best to satisfy unlimited wants with limited means. The “unlimited wants” are captured by the notion of utility, and “limited means” refers to a consumer’s finite income or budget. Economists call this a constrained maximization problem.

As an example, consider Sheila, who has a budget of $1,000 a month (her constraint) for apartment rent. The monthly rents for apartments A, B and C are $900, $1,000 and $1,500. Sheila rules out apartment C – it’s too expensive. Apartment A will save her money, but apartment B, within her budget, may be nicer.

Companies also pursue self-interest

An integral part of microeconomics is the theory of the firm, the term economists use for companies. Economists believe that businesses exist because team production is efficient and it minimizes the costs of contracting.

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Economists study how businesses make as much profit as they possibly can. Companies, like individual people, try to solve a maximization problem: how to maximize their profit. Producer theory seeks to explain how businesses do that.

The study of profit maximization is fascinating to a microeconomicist like me because no company can produce whatever it wants and in unlimited quantities. Businesses are constrained by their technical capabilities and the cost of paying for inputs like capital and labor. Microeconomists describe these technical capabilities by means of the production function. This mathematical relationship describes how businesses use capital and labor to produce their goods or services.

Microeconomics looks at how consumers and companies behave so that they can understand why society needs economic policies to regulate and shape their behavior.

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Define economics.
Explain the concepts of scarcity and opportunity cost and how they relate to the definition of economics.
Understand the three fundamental economic questions: What should be produced? How should goods and services be produced? For whom should goods and services be produced?

Economics is a social science that examines how people choose among the alternatives available to them. It is social because it involves people and their behavior. It is a science because it uses, as much as possible, a scientific approach in its investigation of choices.

All choices mean that one alternative is selected over another. Selecting among alternatives involves three ideas central to economics: scarcity, choice, and opportunity cost.

Our resources are limited. At any one time, we have only so much land, so many factories, so much oil, so many people. But our wants, our desires for the things that we can produce with those resources, are unlimited. We would always like more and better housing, more and better education—more and better of practically everything.

If our resources were also unlimited, we could say yes to each of our wants—and there would be no economics. Because our resources are limited, we cannot say yes to everything. To say yes to one thing requires that we say no to another. Whether we like it or not, we must make choices.

Our unlimited wants are continually colliding with the limits of our resources, forcing us to pick some activities and to reject others. Scarcity is the condition of having to choose among alternatives. A scarce good is one for which the choice of one alternative use of the good requires that another be given up.

Consider a parcel of land. The parcel presents us with several alternative uses. We could build a house on it. We could put a gas station on it. We could create a small park on it. We could leave the land undeveloped in order to be able to make a decision later as to how it should be used.

Suppose we have decided the land should be used for housing. Should it be a large and expensive house or several modest ones? Suppose it is to be a large and expensive house. Who should live in the house? If the Lees live in it, the Nguyens cannot. There are alternative uses of the land both in the sense of the type of use and also in the sense of who gets to use it. The fact that land is scarce means that society must make choices concerning its use.

Virtually everything is scarce. Consider the air we breathe, which is available in huge quantity at no charge to us. Could it possibly be scarce?

The test of whether air is scarce is whether it has alternative uses. What uses can we make of the air? We breathe it. We pollute it when we drive our cars, heat our houses, or operate our factories. In effect, one use of the air is as a garbage dump. We certainly need the air to breathe. But just as certainly, we choose to dump garbage in it. Those two uses are clearly alternatives to each other. The more garbage we dump in the air, the less desirable—and healthy—it will be to breathe. If we decide we want to breathe cleaner air, we must limit the activities that generate pollution. Air is a scarce good because it has alternative uses.

Not all goods, however, confront us with such choices. A free good is one for which the choice of one use does not require that we give up another. One example of a free good is gravity. The fact that gravity is holding you to the earth does not mean that your neighbor is forced to drift up into space! One person’s use of gravity is not an alternative to another person’s use.

There are not many free goods. Outer space, for example, was a free good when the only use we made of it was to gaze at it. But now, our use of space has reached the point where one use can be an alternative to another. Conflicts have already arisen over the allocation of orbital slots for communications satellites. Thus, even parts of outer space are scarce. Space will surely become scarcer as we find new ways to use it. Scarcity characterizes virtually everything. Consequently, the scope of economics is wide indeed.

The choices we confront as a result of scarcity raise three sets of issues. Every economy must answer the following questions:

What should be produced? Using the economy’s scarce resources to produce one thing requires giving up another. Producing better education, for example, may require cutting back on other services, such as health care. A decision to preserve a wilderness area requires giving up other uses of the land. Every society must decide what it will produce with its scarce resources.
How should goods and services be produced? There are all sorts of choices to be made in determining how goods and services should be produced. Should a firm employ a few skilled or a lot of unskilled workers? Should it produce in its own country or should it use foreign plants? Should manufacturing firms use new or recycled raw materials to make their products?
For whom should goods and services be produced? If a good or service is produced, a decision must be made about who will get it. A decision to have one person or group receive a good or service usually means it will not be available to someone else. For example, representatives of the poorest nations on earth often complain that energy consumption per person in the United States is many times greater than energy consumption per person in the world’s scores of poorest countries. Critics argue that the world’s energy should be more evenly allocated. Should it? That is a “for whom” question.

Every economy must determine what should be produced, how it should be produced, and for whom it should be produced. We shall return to these questions again and again.

It is within the context of scarcity that economists define what is perhaps the most important concept in all of economics, the concept of opportunity cost. Opportunity cost is the value of the best alternative forgone in making any choice.

The opportunity cost to you of reading the remainder of this chapter will be the value of the best other use to which you could have put your time. If you choose to spend $20 on a potted plant, you have simultaneously chosen to give up the benefits of spending the $20 on pizzas or a paperback book or a night at the movies. If the book is the most valuable of those alternatives, then the opportunity cost of the plant is the value of the enjoyment you otherwise expected to receive from the book.

The concept of opportunity cost must not be confused with the purchase price of an item. Consider the cost of a college or university education. That includes the value of the best alternative use of money spent for tuition, fees, and books. But the most important cost of a college education is the value of the forgone alternative uses of time spent studying and attending class instead of using the time in some other endeavor. Students sacrifice that time in hopes of even greater earnings in the future or because they place a value on the opportunity to learn. Or consider the cost of going to the doctor. Part of that cost is the value of the best alternative use of the money required to see the doctor. But the cost also includes the value of the best alternative use of the time required to see the doctor. The essential thing to see in the concept of opportunity cost is found in the name of the concept. Opportunity cost is the value of the best opportunity forgone in a particular choice. It is not simply the amount spent on that choice.

The concepts of scarcity, choice, and opportunity cost are at the heart of economics. A good is scarce if the choice of one alternative requires that another be given up. The existence of alternative uses forces us to make choices. The opportunity cost of any choice is the value of the best alternative forgone in making it.

Economics is a social science that examines how people choose among the alternatives available to them.
Scarcity implies that we must give up one alternative in selecting another. A good that is not scarce is a free good.
The three fundamental economic questions are: What should be produced? How should goods and services be produced? For whom should goods and services be produced?
Every choice has an opportunity cost and opportunity costs affect the choices people make. The opportunity cost of any choice is the value of the best alternative that had to be forgone in making that choice.

Canadian Prime Minister Stephen Harper, head of the Conservative Party, had walked a political tightrope for five years as the leader of a minority government in Canada’s parliamentary system. His opponents, upset by policies such as a reduction in corporate tax rates, sought a no-confidence vote in Parliament in 2011. It passed Parliament overwhelmingly, toppling Harper’s government and forcing national elections for a new Parliament.

The political victory was short-lived—the Conservative Party won the May 2011 election easily and emerged as the ruling party in Canada. This allowed Mr. Harper to continue to pursue a policy of deficit and tax reduction.

Canadian voters faced the kinds of choices we have been discussing. Opposition parties—the New Democratic Party (NDP) and the more moderate Liberal Party—sought higher corporate tax rates and less deficit reduction than those advocated by the Conservatives. Under Mr. Harper, the deficit had fallen by one-third in 2010. He promises a surplus budget by 2015, a plan the International Monetary Fund has termed “strong and credible.”

Canada’s unemployment rate in May, 2011 was 7.4 percent compared to a U.S. rate that month of 9.1 percent. GDP growth in Canada was 3.1 percent in 2010; the Bank of Canada projects 4.2 for its growth rate the first quarter of 2011, compared to a U.S. rate for that quarter of 1.8 percent.

Mr. Stephens employed a stimulus package to battle the recession that began in Canada in 2008. He scaled back that effort in 2010 and 2011, producing substantial reductions in the deficit.

Writing on the eve of the election, Wall Street Journal columnist Mary Anastasia O’Grady termed the vote a “referendum on limited government.” Whether or not that characterization was accurate, Canadians clearly made a choice that will result in lower taxes and less spending than the packages offered by the NDP and Liberal Party.

While the issue did not seem to figure prominently in the 2011 campaign, the NDP platform promised to reduce Canada’s greenhouse gas emissions, which have increased with the development of huge oil deposits in Alberta, deposits that have put Canada in third place (behind Venezuela and Saudi Arabia) in the world in terms of oil reserves. Mr. Harper and the Conservatives have promised to proceed with this development as a key factor in Canada’s growth, while the NDP would restrict it sharply. It is a classic case of the problem when choices are made between environmental quality and economic growth.

Sources: Kathleen Harris, “A Vote for the Economy,” Canadian Business, 84(6), May 9, 2011; Nirmala Menon and Paul Vieira, “Canada’s Conservatives Win Majority,” The Wall Street Journal online, May 3, 2011; Paul Vieira, “Canada’s Budget Deficit Shrinks on Strong Growth,” The Wall Street Journal online, April 22, 2011; Mary Anastasia O’Grady, “Canada’s Capitalism Referendum, The Wall Street Journal online, May 2, 2011. The platform of the NDP is available at http://xfer.ndp.ca/2011/2011-Platform/NDP-2011-Platform-En.pdf.