# supply and demand

Satisfactory Essays
KrugMicro2eMods_Mod07_Layout 1 3/21/11 2:08 PM Page 71

What you will learn in this Module:

Module 7
Supply and Demand:
Changes in Equilibrium

How equilibrium price and quantity are affected when there is a change in either supply or demand

How equilibrium price and quantity are affected when there is a simultaneous change in both supply and demand

Changes in Supply and Demand
The emergence of Vietnam as a major coffee-producing country came as a surprise, but the subsequent fall in the price of coffee beans was no surprise at all. Suddenly, the quantity of coffee beans available at any given price rose—that is, there was an increase in supply. Predictably, the increase in supply lowered the equilibrium price.
The entry of Vietnamese producers into the coffee bean business was an example of an event that shifted the supply curve for a good without affecting the demand curve.
There are many such events. There are also events that shift the demand curve without shifting the supply curve. For example, a medical report that chocolate is good for you increases the demand for chocolate but does not affect the supply. That is, events often shift either the supply curve or the demand curve, but not both; it is therefore useful to ask what happens in each case.
We have seen that when a curve shifts, the equilibrium price and quantity change.
We will now concentrate on exactly how the shift of a curve alters the equilibrium price and quantity.

What Happens When the Demand Curve Shifts
Coffee and tea are substitutes: if the price of tea rises, the demand for coffee will increase, and if the price of tea falls, the demand for coffee will decrease. But how does the price of tea affect the market equilibrium for coffee?
Figure 7.1 on the next page shows the effect of a rise in the price of tea on the market for coffee. The rise in the price of tea increases the demand for coffee. Point E1 shows the original equilibrium,

## You May Also Find These Documents Helpful

• Better Essays

INTRODUCTION The price of a commodity such as wheat increases when there is an increase in demand and decrease in supply. This particular case is currently being experienced in China and South Africa. Preceding the price change, changes in demand and supply has to occur. There are factors which cause this change in demand and supply. FACTORS WHICH CAUSE CHANGES IN DEMAND AND SUPPLY China recently experienced a drought causing the low production of wheat. Low production of wheat resulted in a low…

• 1147 Words
• 5 Pages
Better Essays
• Powerful Essays

chapter: 3 >> Supply and Demand Krugman/Wells Economics ©2009  Worth Publishers WHAT YOU WILL LEARN IN THIS CHAPTER      What a competitive market is and how it is described by the supply and demand model What the demand curve and supply curve are The difference between movements along a curve and shifts of a curve How the supply and demand curves determine a market’s equilibrium price and equilibrium quantity In the case of a shortage or surplus, how price moves the…

• 3354 Words
• 14 Pages
Powerful Essays
• Powerful Essays

Laws of Supply and Demand The market price of a good is determined by both the supply and demand for it. In the world today supply and demand is perhaps one of the most fundamental principles that exists for economics and the backbone of a market economy. Supply is represented by how much the market can offer. The quantity supplied refers to the amount of a certain good that producers are willing to supply for a certain demand price. What determines this interconnection is how much of a…

• 1838 Words
• 8 Pages
Powerful Essays
• Good Essays

Supply and demand are the starting point of all economic investigation. It is important to be able to level the two. Supply is the different qualities that a producer will make available to the market at different prices. Demand is the various quantities that a consumer is willing to buy at various prices. There are several reasons demand changes such as; income, preference, taste, changes and expectations in future pricing. The factors that affect supply would be prices and profit. Firms are profit…

• 1180 Words
• 5 Pages
Good Essays
• Better Essays

1. Conceptions 1.1. Demand The demand in economics is the amount of a product that consumers are willing and able to purchase at each specific price in a set of possible prices during some specified period of time (Jackson et al., 2004). In addition, it is a relationship between two economic variables which are the price of a particular good and the quantity of the good that consumers are willing to buy at that price (Taylor and Frost, 2002). Demand also can be described by a table or a…

• 1437 Words
• 5 Pages
Better Essays
• Powerful Essays

Questions and Answers from Lesson I-4: Demand and Supply Practice Questions and Answers from Lesson I-4: Demand and Supply The following questions practice these skills:  Describe when demand or supply increases (shifts right) or decreases (shifts left).  Identify a competitive equilibrium of demand and supply.  Describe the equilibrium shifts when demand or supply increases or decreases.  Describe how prices or gross substitutes or gross complements shift demand.  Describe how input costs or…

• 4601 Words
• 21 Pages
Powerful Essays
• Good Essays

supply and demand Identify two microeconomics and two macroeconomics principles or concepts from the simulation. Explain why you have categorized these principles or concepts as macroeconomic or microeconomic. The microeconomic topics would be the demand and supply curve. The demand curve shows how consumers would react to prices. The supply curve shows how landlords would react to price by how much units will sell. The outside company coming in and the price cap would fall under macroeconomic…

• 916 Words
• 4 Pages
Good Essays
• Satisfactory Essays

C h a p t e r 4 4) A) B) C) D) ELASTICITY Price Elasticity of Demand Topic: The Price Elasticity of Demand Skill: Conceptual Topic: Calculating Elasticity Skill: Conceptual 1) The slope of a demand curve depends on A) the units used to measure price and the units used to measure quantity. B) the units used to measure price but not the units used to measure quantity. C) the units used to measure quantity but not the units used to measure price. D) neither the units used to measure…

• 11797 Words
• 48 Pages
Satisfactory Essays
• Good Essays

The law of supply and demand describes how prices will vary based on the balance between the supply of a product and the demand for that product (Wikipedia, 2005). If there is a balance between the supply, (the availability of the product), and the demand, (how much product the consumers want), then the price for the product would be considered good. If there is an imbalance, the price will change. According to Adam Smith, the invisible hand is a self-adjusting force in the market that corrects…

• 909 Words
• 4 Pages
Good Essays
• Good Essays

Forces of Supply & Demand ” Faculty of Economics UDC INTERNATIONAL BUSINESS SUBJECT: ECONOMICS TEACHER: CLAUDIA MARCELA PRADO MEZA TEAM #5 : LARIZA CHONG AFRA LOPEZ CINTIA VAZQUEZ IVAN ALEXIS WORK: HOMEWORK IN TEAMS EXERCISES OF PAGES 90 - 92 QUESTIONS FOR REVIEW What is a competitive market? Briefly describe the types of markets other than perfectly competitive markets. What determines the quantity of a good that buyers demand? What are…

• 967 Words
• 4 Pages
Good Essays