CHAPTER 1: SECTION 1
A want is something that we desire to have.
Resources are needed to produce the goods and services that satisfy our wants. However, resources are limited. Scarcity occurs when our wants are greater than the resources available to meet them.
Scarcity results in the need to make choices. Regardless of our level of income, each of us must make a choice when purchasing goods or services.

Making Choices Leads to Opportunity Costs
An opportunity cost is the most valued opportunity or alternative we give up when we make a choice. Opportunity costs affect people’s decisions every day (See Transparency 1-
1).
A trade-off is a situation in which more of one thing necessarily means less of something else.

A production possibilities frontier is a graphic representation of all possible combinations of two goods that an economy can produce. Scarcity, choice, and opportunity cost work together in a production possibilities frontier. (See
Transparency 1-2.)
Combinations A–D show us examples of how many skis and/or snowboards the economy is capable of producing in a given amount of time. These combinations, when graphed, form a line. The economy can produce any combination of skis and snowboards along or below this line.

Let’s compare points B and C. When the economy reduces snowboard production from 40,000 to 25,000, the production of skis is able to increase from 20,000 to 40,000. The opportunity cost of not producing 15,000 snowboards is equal to the production of 20,000 skis.
Point F shows us a production combination that is not possible. There are not enough resources available to produce this quantity of both skis and snowboards.

Because of scarcity, we need a rationing device to determine who gets what portion of all the resources and goods available. What is one common way our society determines who gets a certain good? Money is the most widely used rationing device in our society.
Because people compete for the rationing device, competition is a consequence of scarcity.
If scarcity did not exist, everyone would get everything that he or she wanted. (See Transparency 1-3).

Economics is the science that studies the choices of people trying to satisfy their wants in a world of scarcity. Put another way, economics studies how people use their limited resources to satisfy their unlimited wants.

CHAPTER 1: SECTION 2
A person will want to do a particular activity only if the benefits are greater than the costs. Weighing the costs and benefits of a decision is a process called cost-benefit analysis.
The word marginal , in economics, means additional.
Suppose that your lunch costs $5, and that you are considering buying a soda to go with your lunch. This soda will have a cost that is in addition to your $5 meal. The additional cost is called the marginal cost.

Economists use the word incentive to describe something that encourages or motivates a person to take action. For example, if your parents offer you $10 to mow the lawn, the incentive, the $10, may motivate or encourage you to mow the lawn.

Individuals face trade-offs. More of one thing necessarily means less of something else. Often you make decisions between something you like and something you dislike. What trade-offs have you faced today?
Societies also face trade-offs. For example, the federal government has only so much money from tax revenues. If more of its tax dollars go to education, fewer are available to be spent on road and highway maintenance. What other types of trade-offs might the government consider when determining if more tax dollars should be spent on education?
(Answers: health care, defense, etc.)

When you think in terms of “what would have been,” you begin to understand the opportunity costs for “what is.”
It takes a certain kind of vision to see what would have been, using your mind, and not your eyes. For example, suppose the federal government sets aside funds for a new interstate highway system. Thousands of people are hired to work on the project, and the benefits are easy to see—more jobs and better roads.

However, there is more than meets the eye in this scenario.
The taxpayers had to pay for the new highway system. What did the taxpayers give up by paying taxes to fund the new highway? They gave up the opportunity to buy goods for themselves, such as clothes, computers, and books.
What would have been produced and consumed had the highway not been built? If more computers had been produced instead of highways, more people would have worked in the computer industry and fewer would have worked in highway construction.

Economists often look for the unintended effects of actions that people have taken.
If a store owner increases prices, will he necessarily make more money? Often an attempt to increase sales, by increasing prices, can lead to the unintended effect of fewer sales.

Economics is divided into two branches: microeconomics and macroeconomics.
Microeconomics is the study of the small picture, such as the behavior and choices of individuals or a single business or industry. For example, in microeconomics, an economist would study and discuss the unemployment that exists within an industry, such as the auto industry.

Macroeconomics is the study of the big picture. Economists studying macroeconomics may look at the behavior and choices of the entire economy. To continue our example, in macroeconomics, an economist would study the unemployment that exists in the entire nation. (See
Transparency 1-4; you might add your own or students’ examples to the chart.)

Why is the crime rate higher in some countries than in other countries? What causes some nations to be rich and others to be poor? These questions do not have easy, obvious answers.
To answer them, economists build theories.
A theory is an explanation of how something works, designed to answer a question for which there is no obvious answer.

Theories may not always seem reasonable. Suppose you lived during the period of the Roman Empire and someone proposed to you that the Earth was round. At that time many would have thought this was an unreasonable theory, but today most everyone would agree that the Earth is indeed round.
Scientists believe that we should evaluate theories based not on how they sound to us, or whether they seem right, but on how well they predict. If they predict well, then we should accept them.

CHAPTER 1: SECTION 3
All things that people want can be classified as either tangible or intangible. Something that can be felt by touch is a tangible item, such as a book or a car. Something that cannot be felt by touch is intangible . Friendship is intangible, as are knowledge and experience.
A good is anything that satisfies a person’s wants or brings satisfaction.

A good can also bring a person satisfaction or happiness, or utility . The term disutility is used to describe something that brings dissatisfaction or unhappiness.
Another example of a tangible good is a service. Services are tasks that you pay other people—such as doctors, hair-stylists, or car mechanics—to perform for you.

Goods and services cannot be produced without resources.
The resources used to produce goods and services fall into the following categories: land, labor, capital, and entrepreneurship.
•
Land includes all the natural resources found in nature. An acre of land, mineral deposits, and water in a stream are all considered land.
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Labor refers to the physical and mental talents that people contribute to the production of goods and services.

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Capital is the produced goods that can be used as resources for further production. Factories, machines, and farm tractors are capital.
•
Entrepreneurship is the special talent that some people have for searching out and taking advantage of new business opportunities and for developing new products and new ways of doing things.
What is the difference between entrepreneurship and labor?
Entrepreneurship is different from labor in that the ordinary mental and physical talents of people are considered labor.
The special talents and methods unique to an individual describe entrepreneurship.