1. Chapter 5: Supply Section 1

2. Objectives Explain the law of supply.
Interpret a supply schedule and a supply graph.
Examine the relationship between elasticity of supply and time.

3. Key Terms supply: the amount of goods available
law of supply: producers offer more of a good as its price increases and less as its price falls
quantity supplied: the amount that a supplier is willing and able to supply at a specific price
supply schedule: a chart that lists how much of a good a supplier will offer at various prices
variable: a factor that can change

4. Key Terms, cont.
market supply schedule: a chart that lists how much of a good all suppliers will offer at various prices
supply curve: a graph of the quantity supplied of a good at various prices
market supply curve: a graph of the quantity supplied of a good by all suppliers at various prices
elasticity of supply: a measure of the way quantity supplied reacts to a change in price

5. Introduction How does the law of supply affect the quantity supplied?
As prices rise, producers will offer more of a good and new suppliers will enter the market in the hopes of making a profit.
The law of supply states that as prices rise, so will the quantity supplied.

6. The Law of Supply Supply is the amount of goods available.
As the price of a good increases, producers will offer more of it and as the price decreases, they will offer less.
The law of supply includes two movements:
Individual firms changing their level of production
Firms entering or exiting the market

7. What is the Law of Supply?

8. Higher Production
If a firm is earning a profit from the sale of a good or service, then an increase in the price will, in turn, increase the firm’s profits.
In general, the search for profit drives the choices made by the producer.

9. Market Entry
Checkpoint: Why do firms increase production when the price of a good goes up?
Rising prices encourage new firms to join the market and will add to the quantity supplied of the good.
Take, for example, the music market:
When a particular type of music becomes popular, such as 70’s disco or 90’s grunge, more bands will play that type of music in order to profit from such music’s popularity.
This action reflects the law of supply.
Checkpoint Answer: Because the law of supply states that as prices rise, so does the amount of quantity supplied

10. The Supply Schedule
Supply of a good can be measured using a supply schedule.
A supply schedule shows the relationship between price and quantity supplied for a particular good.
An individual supply schedule shows how much of a good a single supplier will be able to offer at various prices. A market supply schedule shows how much of a good all firms in a particular market can offer at various prices.

11. Supply Schedule
The supply schedule lists how many slice of pizza one pizzeria will offer at different prices. The market supply schedule represents all suppliers in a market.
What does the individual supply schedule tell you about the pizzeria owner’s decisions?
How does the market supply schedule compare to the individual supply schedule?
Answers: 1. That the higher the price of pizza, the more the pizzeria owner will supply. 2. It follows a similar patter as the individual supply schedule with a larger quantity of slices supplied each day, which reflects the entire market.

12. The Supply Graph
A supply schedule can be represented graphically by plotting points on a supply curve.
A supply curve always rises from left to right because higher prices leads to higher output.
Checkpoint: What are the two variables represented in a supply schedule or supply curve?
Checkpoint Answer: price and quantity supplied

13. Elasticity of Supply
Elasticity of supply, based on the same concept of elasticity of demand, measures how firms will respond to changes in the price of a good.
Elastic
When elasticity is greater than one, supply is very sensitive to price changes
Inelastic
When elasticity is less than one, supply is not very responsive to price changes.

14. Elasticity in the Short Run
In the short run, it is difficult for a firm to change its output level, so supply is inelastic.
Many agricultural businesses, such as harvesting cranberries, have a hard time adjusting to price changes in the short term.

15. Elasticity in the Long Run
In the long run, supply can become more elastic.
Just like demand, supply becomes more elastic if the supplier has a longer time to respond to a price change.

16. Review
Now that you have learned how the law of supply affects the quantity supplied, go back and answer the Chapter Essential Question.
How do suppliers decide what goods and services to offer?

17. Chapter 5: Supply Section 2

18. Objectives
Explain how firms decide how much labor to hire in order to produce a certain level of output.
Analyze the production costs of a firm.
Explain how a firm chooses to set output.
Identify the factors that a firm must consider before shutting down a profitable business.

19. Key Terms
marginal product of labor: the change in output from hiring one additional unit of labor
increasing marginal returns: a level of production in which the marginal product of labor increases as the number of workers increases
diminishing marginal returns: a level of production in which the marginal product of labor decreases as the number of workers increases
fixed cost: a cost that does not change, no matter how much of a good is produced

20. Key Terms, cont.
variable cost: a cost that rises and falls depending on the quantity produced
total cost: the sum of fixed costs plus variable costs
marginal cost: the cost of producing one more unit of a good
marginal revenue: the additional income from selling one more unit of a good
average cost: the total cost divided by the quantity produced
operating cost: the cost of operating a facility

21. Introduction How can a producer maximize profits?
When thinking about how to maximize profits, producers think about the cost involved in producing one more unit of a good.
Costs producers take into consideration are:
Operating cost
Variable cost
Total cost
Marginal cost

22. Labor and Output
All business owners must decide how many workers they will hire.
The addition of new workers will increase production until it reaches its peak, at which point, production actually decreases.

23. Marginal Returns
The addition of more workers to a firm allow for a greater amount of specialization.
Specialization increases the output and the firm enjoys increasing marginal returns.

24. Marginal Returns, cont.
Eventually, though, the benefits of specialization end and the addition of more workers increases total output but at a diminishing rate.
A firm with diminishing marginal returns will produce less and less output from each additional unit of labor.
Answer: 5 beanbags per hour
What is the marginal product of labor when the factory employs five workers?

25. Fixed Costs
Production costs are divided into two categories - fixed costs and variable costs.
Fixed costs mainly involve the production facility and include:
Rent
Machinery repair
Property taxes
Worker’s salaries

26. Variable Costs Variable costs include:
Price of raw materials
Some labor
Electricity and heating bills
Fixed costs and variable costs are added together to find the total cost.

27. Marginal Cost of Production
Knowing the total cost of several levels of output helps determine the marginal cost of production at each level, or the additional costs of producing one more unit.
One way to find the best level of output is to figure out where marginal cost is equal to marginal revenue, or the additional income from selling one more unit of a good.

28. Setting Output A firm’s primary goal is to maximize profits.
The firm wants to make the most profit with the least amount of total production cost to the firm.
Answer: Because that is the market price for each beanbag and does not change regardless of how many beanbags are produced.
Why is the marginal revenue always equal to $24?

29. Determining a Firm’s Profit
The graph to the right shows how a firm’s profit per hour can be determined by subtracting total cost from total revenue.
What would happen to output if market price fell to $20?
Why would the firm increase output if the price of a beanbag rose to $37?
Answers: 1. Output would decrease. 2. Because the firm stands to make a larger profit when a beanbag costs $37.

30. The Shutdown Decision
What happens to a factory that starts to lose money?
Sometimes, even though a factory is producing at its most profitable level, the market price is so low that the factory’s total revenue is still less than its total cost.
The factory owners have two choices:
Continue to produce goods and lose money
Shut down the factory

31. Option 1: Continue to Produce
Checkpoint: When should a firm keep a money-losing factory open?
The firm should keep the factory open if the total revenue from the goods is greater than the cost of keeping the factory open.
This would work if the benefit of operating the factory is greater than the variable cost.
Checkpoint Answer: The firm should keep the factory open if the total revenue from the goods is greater than the cost of keeping the factory open

32. Option 2: Shut Down the Factory
If a firm shuts the factory down it still has to pay all of its fixed costs so it would have money going out but nothing coming in.
The firm would lose an amount equal to its fixed costs.

33. Review
Now that you have learned how a producer can maximize profits, go back and answer the Chapter Essential Question.
How do suppliers decide what goods and services to offer?

34. Chapter 5: Supply Section 3

35. Objectives
Explain how factors such as input costs create changes in supply.
Identify three ways that the government can influence the supply of goods.
Analyze other factors that affect supply.
Explain how firms choose a location to produce goods.

36. Key Terms
subsidy: a government payment that supports a business or market
excise tax: a tax on the production or sale of a good
regulations: government intervention in a market that affects the production of a good

37. Introduction Why does the supply curve shift?
Several factors cause the supply curve to shift. These include:
Shifts in prices
Rising costs
Technology
Changes in the global economy
Future expectations of prices
Number of suppliers

38. Input Costs
Any changes in the cost of an input used to make a good will affect supply.
A rise in the cost of raw materials, for example, will result in a decrease in supply because the good has become more expensive to produce.
The high input costs that dairy farmers pay for feed, labor, and fuel result in higher prices for milk and other dairy products.

39. Rising Costs and Technology
If costs continue to rise, a firm will have to cut production and lower its marginal cost.
It is possible for input costs to drop.
In many industries, advances in technology can lower production costs.
Examples of technology advances include:
Automation
Computers

41. Government’s Influence
In addition to input costs, the federal government also has the power to affect the supplies of many types of good.
Subsidies
The government often gives subsidies to the producers of a good.
Subsidies generally lower cost, which allows a firm to produce more goods.
Reasons for subsidizing products include:
To provide for people during food shortages
To protect young industries from foreign competition.

42. Government Influences, cont.
Taxes
Excise taxes increase production costs by adding an extra cost for each unit sold.
They are sometimes used to discourage the sale of a good the government deems harmful, such as cigarettes and alcohol.

43. Government Influences, cont.
Regulation
Indirectly, government regulation often has the effect of raising costs.
When the government regulated the auto industry to cut down on pollution, these regulations led to an increase in the cost of manufacturing cars.

44. Non-Price Influences Changes in the global economy
Since many goods and services are imported, changes in other countries can affect the supply of those goods.
An increase in wages in one country or the increased supply of a good in another will cause the overall supply curve to shift.
Restrictions on imports also affect supply.

45. Shifts in the Supply Curve
Factors that reduce supply shift the supply curve to the left, while factors that increase supply move the supply curve to the right.
Which graph best represents the effects of higher costs?
Which graph best represents advances in technology?
Answers: 1. Decrease in Supply graph. 2. Increase in Supply graph

46. Future Expectations of Prices
Checkpoint: What happens to supply if the price of a good is expected to rise in the future?
If a seller expects the price of a good to rise in the future, the seller will store the goods now in order to sell more in the future.
If the prices of good is expected to drop in the near future, sellers will earn more by placing goods on the market immediately, before the price falls.
Checkpoint Answer: Supply will decrease.

47. Number of Suppliers
If more suppliers enter a market, the market supply will rise and the supply curve will shift to the right.
If suppliers stop producing a good and leave the market, market supply will decline, causing the supply curve to shift to the left.

48. Where do Firms Produce?
Checkpoint: When is a firm likely to locate close to its consumers?
A key factor in where a firm will locate is transportation.
When inputs such as raw materials are expensive to transport, a firm will locate close to the inputs.
When outputs (the final product) are more costly to transport, firms will locate close to the consumer.
Checkpoint Answer: When the final product is more expensive to transport.

49. Review
Now that you have learned why the supply curve shifts, go back and answer the Chapter Essential Question
How do suppliers decide what goods and services to offer?