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Microeconomics: Introduction to Supply and Demand

Microeconomics (from Greek prefix mikro- meaning “small” + economics) is a branch of economics that studies the behavior of individuals and firms in making decisions regarding the allocation of scarce resources and the interactions among these individuals and firms. One goal of microeconomics is to analyze the market mechanisms that establish relative prices among goods and services and allocate limited resources among alternative

3 Comments

13
Feb
Introduction to Microeconomics

The Rolling Stones once said: “You can’t always get what you want.” This is true. For most people (even Mick Jagger), that there are limits to what you can have or do is a simple fact of life learned in early childhood. For economists, however, it can be an obsession. Much of microeconomics is about

14
Apr
What Is a Market?

Business people, journalists, politicians, and ordinary consumers talk about markets all the time—for example, oil markets, housing markets, bond markets, labor markets, and markets for all kinds of goods and services. But often what they mean by the word “market” is vague or misleading. In economics, markets are a central focus of analysis, so economists

14
Apr
Real versus Nominal Prices

We often want to compare the price of a good today with what it was in the past or is likely to be in the future. To make such a comparison meaningful, we need to measure prices relative to an overall price level. In absolute terms, the price of a dozen eggs is many times

14
Apr
Why Study Microeconomics?

We think that after reading this book you will have no doubt about the impor- tance and broad applicability of microeconomics. In fact, one of our major goals is to show you how to apply microeconomic principles to actual decision-making problems. Nonetheless, some extra motivation early on never hurts. Here are two examples that not

14
Apr
Supply and Demand

The basic model of supply and demand is the workhorse of microeconomics. It helps us understand why and how prices change, and what happens when the government intervenes in a market. The supply-demand model combines two important concepts: a supply curve and a demand curve. It is important to under- stand precisely what these curves

15
Apr
The Market Mechanism

The next step is to put the supply curve and the demand curve together. We have done this in Figure 2.3. The vertical axis shows the price of a good, P, again measured in dollars per unit. This is now the price that sellers receive for a given quantity supplied, and the price that buyers

15
Apr
Changes in Market Equilibrium

We have seen how supply and demand curves shift in response to changes in such variables as wage rates, capital costs, and income. We have also seen how the market mechanism results in an equilibrium in which the quantity supplied equals the quantity demanded. Now we will see how that equilib- rium changes in response

15
Apr
Elasticities of Supply and Demand

We have seen that the demand for a good depends not only on its price, but also on consumer income and on the prices of other goods. Likewise, supply depends both on price and on variables that affect production cost. For example, if the price of coffee increases, the quantity demanded will fall and the

15
Apr
Short-Run versus Long-Run Elasticities

When analyzing demand and supply, we must distinguish between the short run and the long run. In other words, if we ask how much demand or supply changes in response to a change in price, we must be clear about how much time is allowed to pass before we measure the changes in the quantity

15
Apr
Understanding and Predicting the Effects of Changing Market Conditions

So far, our discussion of supply and demand has been largely qualitative. To use supply and demand curves to analyze and predict the effects of changing market conditions, we must begin attaching numbers to them. For example, to see how a 50-percent reduction in the supply of Brazilian coffee may affect the world price of

15
Apr
Effects of Government Intervention—Price Controls

In the United States and most other industrial countries, markets are rarely free of government intervention. Besides imposing taxes and granting subsidies, governments often regulate markets (even competitive markets) in a variety of ways. In this section, we will see how to use supply and demand curves to ana- lyze the effects of one common

15
Apr
Consumer Behavior

Some time ago, General Mills introduced a new breakfast cereal. The new brand, Apple-Cinnamon Cheerios, was a sweetened and more flavorful variant on General Mills’ classic Cheerios product. But before Apple-Cinnamon Cheerios could be extensively marketed, the company had to resolve an important problem: How high a price should it charge? No matter how good

15
Apr
Consumer Preferences

Given both the vast number of goods and services that our industrial economy provides for purchase and the diversity of personal tastes, how can we describe consumer preferences in a coherent way? Let’s begin by thinking about how a consumer might compare different groups of items available for purchase. Will one group of items be

15
Apr
Budget Constraints

So far, we have focused only on the first element of consumer theory—consumer preferences. We have seen how indifference curves (or, alternatively, utility func- tions) can be used to describe how consumers value various baskets of goods. Now we turn to the second element of consumer theory: the budget constraints that consumers face as a

15
Apr
Consumer Choice

Given preferences and budget constraints, we can now determine how individual consumers choose how much of each good to buy. We assume that consumers make this choice in a rational way—that they choose goods to maximize the sat- isfaction they can achieve, given the limited budget available to them. The maximizing market basket must satisfy

15
Apr
Revealed Preference

In Section 3.1, we saw how an individual’s preferences could be represented by a series of indifference curves. Then in Section 3.3, we saw how preferences, given budget constraints, determine choices. Can this process be reversed? If we know the choices that a consumer has made, can we determine his or her preferences? We can

16
Apr
Marginal Utility and Consumer Choice

In Section 3.3, we showed graphically how a consumer can maximize his or her satisfaction, given a budget constraint. We do this by finding the highest indifference curve that can be reached, given that budget constraint. Because the highest indifference curve also has the highest attainable level of utility, it is natural to recast the

16
Apr
Cost-of-Living Indexes

The Social Security system has been the subject of heated debate for some time now. Under the present system, a retired person receives an annual benefit that is initially determined at the time of retirement and is based on his or her work history. The benefit then increases from year to year at a rate

16
Apr
Individual Demand

This section shows how the demand curve of an individual consumer follows from the consumption choices that a person makes when faced with a budget constraint. To illustrate these concepts graphically, we will limit the avail- able goods to food and clothing, and we will rely on the utility-maximization approach described in Section 3.3 (page

16
Apr
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