1. Presentation Pro © 2001 by Prentice Hall, Inc. Economics: Principles in Action C H A P T E R 5 Supply

2. 123 Go To Section: Supply C H A P T E R 5 Supply SECTION 1 Understanding Supply SECTION 2 Costs of Production SECTION 3 Changes in Supply Chapter 5 2222 3333 1111

3. 123 Go To Section: Chapter 5, Section 1 Understanding Supply S E C T I O N 1 Understanding Supply What is the law of supply? What are supply schedules and supply curves? What is elasticity of supply? What factors affect elasticity of supply? 2222 3333

4. 123 Go To Section: Think about this… Lets say you want to make some money. So, you start a business selling candy for $1 a bar. By the end of third hour all your candy is gone yet, people continue to ask “do you have candy?” in all of your classes and you reply no. As a wise entrepreneur, how do you respond to high demand and low supply? Write an answer on your white board. (2 minutes then whip around)

5. 123 Go To Section: Supply Response The wise entrepreneur is going to do one or two things 1.buy more candy so he/she does not run out in third hour 2. rise the price (because demand is high) At the same time other people are going to start noting they too could make money by selling candy. So you will see more suppliers selling the same or similar products. As price increases supply increases www.youtube.com/watch?v=Ng3XHPdexNM

6. 123 Go To Section: The Law of Supply Chapter 5, Section 1 According to the law of supply, suppliers will offer more of a good at a higher price. Law of Supply Price As price increases… Supply Quantity supplied increases Price As price falls… Supply Quantity supplied falls 2222 3333

7. 123 Go To Section: 2 nd Example of Supply in Action Lets say you work 40 hours a week at a mall making $10.00 an hour You also go to school full time On your own time you enjoy making gift baskets and you know people are willing to buy them for $5 After work and school how many baskets are you willing to make?

8. 123 Go To Section: 2 nd Example of Supply in Action Cont. Now, same situation you work and go to school full time but people are willing to by your baskets for $16 apiece. Write your answer on your board Are you will to make more baskets at $16? Explain your answer to your neighbor They become willing to do more work because they know they can make more profits in the end They might advertise and push their product more

9. 123 Go To Section: How Does the Law of Supply Work? Economists use the term quantity supplied to describe how much of a good is offered for sale at a specific price. The promise of increased revenues when prices are high encourages firms to produce more. Rising prices draw new firms into a market and add to the quantity supplied of a good. Chapter 5, Section 1 2222 3333

10. 123 Go To Section: $.501,000 Price per slice of pizzaSlices supplied per day Market Supply Schedule Supply Schedules A market supply schedule is a chart that lists how much of a good all suppliers will offer at different prices. Chapter 5, Section 1 $1.001,500 $1.502,000 $2.002,500 $2.503,000 $3.003,500 2222 3333

11. 123 Go To Section: Supply Curves A market supply curve is a graph of the quantity supplied of a good by all suppliers at different prices. Chapter 5, Section 1 Market Supply Curve Price (in dollars) Output (slices per day) 3.00 2.50 2.00 1.50 1.00.50 0 0500100015002000250030003500 Supply 2222 3333

12. 123 Go To Section: Elasticity of Supply If supply is not very responsive to changes in price, it is considered inelastic. Chapter 5, Section 1 An elastic supply is very sensitive to changes in price. Elasticity of supply is a measure of the way quantity supplied reacts to a change in price. 2222 3333

13. 123 Go To Section: Chapter 5, Section 1 What Affects Elasticity of Supply? Time. In the long run, firms are more flexible, so supply can become more elastic. In the short run, a firm cannot easily change its output level, so supply is inelastic. 2222 3333

14. 123 Go To Section: Section 1 Review 1. What is the law of supply? (a) The lower the price, the larger the quantity supplied. (b) The higher the price, the larger the quantity supplied. (c) The higher the price, the smaller the quantity supplied. (d) The lower the price, the more manufacturers will produce the good. 2. What happens when the price of a good with an elastic supply goes down? (a) Existing producers will expand and some new producers will enter the market. (b) Some producers will produce less and others will drop out of the market. (c) Existing firms will continue their usual output but will earn less. (d) New firms will enter the market as older ones drop out. Chapter 5, Section 1 Want to connect to the Economics link for this section? Click Here!Click Here! 2222 3333

15. 123 Go To Section: Costs of Production S E C T I O N 2 Costs of Production How do firms decide how much labor to hire? What are production costs? How do firms decide how much to produce? Chapter 5, Section 2 3333 1111

16. 123 Go To Section: A Firm’s Labor Decisions Business owners have to consider how the number of workers they hire will affect their total production. The marginal product of labor is the change in output from hiring one additional unit of labor, or worker. Chapter 5, Section 2 Marginal Product of Labor Labor (number of workers) Output (beanbags per hour) Marginal product of labor 00— 144 2106 3177 4236 5285 6313 7321 831–1 3333 1111

17. 123 Go To Section: Marginal Returns Increasing marginal returns occur when marginal production levels increase with new investment. Increasing, Diminishing, and Negative Marginal Returns Labor (number of workers) Marginal Product of labor (beanbags per hour) 8 7 6 5 4 3 2 1 0 –1 –2 –3 123 Increasing marginal returns Diminishing marginal returns occur when marginal production levels decrease with new investment. 4567 Diminishing marginal returns Negative marginal returns occur when the marginal product of labor becomes negative. 89 Negative marginal returns 3333 1111 Chapter 5, Section 2

18. 123 Go To Section: Production Costs A fixed cost is a cost that does not change, regardless of how much of a good is produced. Examples: rent and salaries Variable costs are costs that rise or fall depending on how much is produced. Examples: costs of raw materials, some labor costs. The total cost equals fixed costs plus variable costs. The marginal cost is the cost of producing one more unit of a good. Chapter 5, Section 2 3333 1111

19. 123 Go To Section: Setting Output Marginal revenue is the additional income from selling one more unit of a good. It is usually equal to price. To determine the best level of output, firms determine the output level at which marginal revenue is equal to marginal cost. Chapter 5, Section 2 Production Costs Total revenue Profit (total revenue – total cost) Marginal revenue (market price) Marginal cost Total cost (fixed cost + variable cost) Variable cost Fixed cost Beanbags (per hour) $ –36 –20 0 21 40 0123401234 $0 24 48 72 96 $24 24 — $8 4 3 5 $36 44 48 51 56 $0 8 12 15 20 $36 36 57 72 84 93 56785678 120 144 168 192 24 7 9 12 15 63 72 84 99 27 36 48 63 36 98 92 79 216 240 264 288 24 19 24 30 37 36 9 10 11 12 82 106 136 173 118 142 172 209 3333 1111

20. 123 Go To Section: Section 2 Review 1. What are diminishing marginal returns of labor? (a) Some workers increase output but others have the opposite effect. (b) Additional workers increase total output but at a decreasing rate. (c) Only a few workers will have to wait their turn to be productive. (d) Additional workers will be more productive. 2. How does a firm set his or her total output to maximize profit? (a) Set production so that total revenue plus costs is greatest. (b) Set production at the point where marginal revenue is smallest. (c) Determine the largest gap between total revenue and total cost. (d) Determine where marginal revenue and profit are the same. Chapter 5, Section 2 Want to connect to the Economics link for this section? Click Here!Click Here! 3333 1111

21. 123 Go To Section: Chapter 5, Section 3 Changes in Supply S E C T I O N 3 Changes in Supply How do input costs affect supply? How can the government affect the supply of a good? What other factors can influence supply? 2222 1111

22. 123 Go To Section: Input Costs and Supply Any change in the cost of an input such as the raw materials, machinery, or labor used to produce a good, will affect supply. As input costs increase, the firm’s marginal costs also increase, marginal cost is the cost of producing one more unit of a good, decreasing profitability and supply. Input costs can also decrease. New technology can greatly decrease costs and increase supply. Chapter 5, Section 3 2222 1111

23. 123 Go To Section: Government Influences on Supply Chapter 5, Section 3 By raising or lowering the cost of producing goods, the government can encourage or discourage an entrepreneur or industry. 2222 1111

24. 123 Go To Section: Other Factors Influencing Supply The Global Economy The supply of imported goods and services has an impact on the supply of the same goods and services here. Government import restrictions will cause a decrease in the supply of restricted goods. Future Expectations of Prices Expectations of higher prices will reduce supply now and increase supply later. Expectations of lower prices will have the opposite effect. Number of Suppliers If more firms enter a market, the market supply of the good will rise. If firms leave the market, supply will decrease. Chapter 5, Section 3 2222 1111

25. 123 Go To Section: Section 3 Review 1. What affect does a rise in the cost of raw materials have on the cost of a good? (a) A rise in the cost of raw materials lowers the overall cost of production. (b) The good becomes cheaper to produce. (c) The good becomes more expensive to produce. (d) This does not have any affect on the eventual price of a good. 2. When government actions cause the supply of a good to increase, what happens to the supply curve for that good? (a) It shifts to the left. (b) It shifts to the right. (c) It reverses direction. (d) The supply curve is unaffected. Chapter 5, Section 3 Want to connect to the Economics link for this section? Click Here!Click Here! 2222 1111