1. Bellwork- fill in the blank
______________ Effect= when consumers react to an increase in a good's price by consuming less of that good and more of other goods.
___________ Effect- the change in consumption resulting from a change in real income.
___________Good – demand rises as income rises and vice versa
___________Good – demand falls as income rises and vice versa
___________ measures the extent to which demand will change

2. EQ: What determines the supply of a good in a competitive market?
Supply and Demand
How Markets Work?
California Standard: Students understand the relationship of the concept of incentives to the law of supply and the relationship of the concept of incentives and substitutes to the law of supply
EQ: What determines the supply of a good in a competitive market?

3. **MARKETS AND COMPETITION**
The terms supply and demand refer to the behavior of people......as they interact with one another in markets.
A market is a group of buyers and sellers of a particular good or service.
Buyers determine demand...
Sellers determine supply…
EQ: What determines the supply of a good in a competitive market?

4. Competitive Markets
A Competitive Market is a market with many buyers and sellers so that each has a negligible impact on the market price.
EQ: What determines the supply of a good in a competitive market?

5. **Competition: Perfect or Otherwise**
Perfectly Competitive:
Homogeneous Products
Buyers and Sellers are Price Takers
Monopoly:
One Seller, controls price
Oligopoly:
Few Sellers, not aggressive competition
Monopolistic Competition:
Many Sellers, differentiated products
EQ: What determines the supply of a good in a competitive market?

6. Laws of Supply and Demand
What is Demand?
The willingness to buy a good or service at all prices
What is the law of Demand?
If nothing else changes, the quantity demand of a good or service is greater at lower prices than higher.
What is Supply?
Supply is the quantity of a good or service a firm is willing to produce at all prices.
What is the law of Supply?
If nothing else changes, firms are willing to supply a greater quantity of good or service at higher prices than lower.
EQ: What determines the supply of a good in a competitive market?

7. Catherine’s Demand Schedule
Price of Ice-cream Cone ($)
Quantity of cones Demanded
0.00 12
0.50 10
1.00 8
3.00 2
2.50 4
2.00 6
1.50
EQ: What determines the supply of a good in a competitive market?

8. Catherine’s Demand Curve
Price of Ice-Cream Cone
$3.00
2.50 2
2.00 4
1.50
1.00
0.50 6 8 10 12
Quantity of Ice-Cream Cones
EQ: What determines the supply of a good in a competitive market?

9. Market demand as the Sum of Individual Demands
Price of Ice-cream Cone ($)
Catherine
Nicholas
Market
0.00 12 + 7 = 19
0.50 10 6 16 2
2.50 4
2.00 6
1.50 8
1.00 3 5 7 10 13
3.00 1 1
EQ: What determines the supply of a good in a competitive market?

10. SUPPLY
Quantity Supplied refers to the amount (quantity) of a good that sellers are willing to make available for sale at alternative prices for a given period.
EQ: What determines the supply of a good in a competitive market?

11. **Determinants of Supply**
What factors determine how much ice cream you are willing to offer or produce?
Product’s Own Price
Input prices
Technology
Expectations
Number of sellers
EQ: What determines the supply of a good in a competitive market?

12. The Supply Schedule and the Supply Curve
The supply schedule is a table that shows the relationship between the price of the good and the quantity supplied.
The supply curve is a graph of the relationship between the price of a good and the quantity supplied.
Ceteris Paribus: “Other thing being equal”
EQ: What determines the supply of a good in a competitive market?

13. Quantity of cones Supplied Price of Ice-cream Cone ($)
Ben’s Supply Schedule
Quantity of cones Supplied
Price of Ice-cream Cone ($)
0.00
0.50
1.00 1 5
3.00 4
2.50 3
2.00 2
1.50
EQ: What determines the supply of a good in a competitive market?

14. Ben’s Supply Curve
Price of Ice-Cream Cone 4
$3.00
2.50 5
2.00 3 2
1.50
1.00 1
0.50 6 8 10 12
Quantity of Ice-Cream Cones
EQ: What determines the supply of a good in a competitive market?

15. Market Supply Schedule
Market supply is the sum of all individual supplies at each possible price.
Graphically, individual supply curves are summed horizontally to obtain the market demand curve.
Assume the ice cream market has two suppliers as follows…
EQ: What determines the supply of a good in a competitive market?

16. Table 4-5: Market supply as the Sum of Individual Supplies
Price of Ice-cream Cone ($)
Ben
Nicholas
Market
0.00 + =
0.50 4
2.50 3
2.00 2
1.50 1
1.00 6 10 7
3.00 5 8 13
EQ: What determines the supply of a good in a competitive market?

17. Shifts in the Supply Curve
Price of Ice-Cream Cone S3 S1 S2
Decrease in supply
Increase in supply
Quantity of Ice-Cream Cones
EQ: What determines the supply of a good in a competitive market?

18. The Determinants of Quantity Supplied
EQ: What determines the supply of a good in a competitive market?

19. SUPPLY AND DEMAND TOGETHER
Equilibrium refers to a situation in which the price has reached the level where quantity supplied equals quantity demanded.
EQ: What determines the supply of a good in a competitive market?

20. **Equilibrium** Equilibrium Price
The price that balances quantity supplied and quantity demanded.
On a graph, it is the price at which the supply and demand curves intersect.
Equilibrium Quantity
The quantity supplied and the quantity demanded at the equilibrium price.
On a graph it is the quantity at which the supply and demand curves intersect.
EQ: What determines the supply of a good in a competitive market?

21. At $2.00, the quantity demanded is equal to the quantity supplied!
Equilibrium
Demand Schedule
Supply Schedule
At $2.00, the quantity demanded is equal to the quantity supplied!
EQ: What determines the supply of a good in a competitive market?

22. The Equilibrium of Supply and Demand
Price of Ice-Cream Cone
Supply
Demand
Equilibrium price
Equilibrium
$2.00
Equilibrium quantity 1 2 3 4 5 6 7 8 9 10 11
Quantity of Ice-Cream Cones
EQ: What determines the supply of a good in a competitive market?

23. **Disequilibrium** Surplus
When price > equilibrium price, then quantity supplied > quantity demanded.
There is excess supply or a surplus.
Suppliers will lower the price to increase sales, thereby moving toward equilibrium.
Shortage
When price < equilibrium price, then quantity demanded > the quantity supplied.
There is excess demand or a shortage.
Suppliers will raise the price due to too many buyers chasing too few goods, thereby moving toward equilibrium.
EQ: What determines the supply of a good in a competitive market?

24. Concluding Remarks…
Market economies harness the forces of supply and demand. . .
Supply and Demand together determine the prices of the economy’s different goods and services. . .
Prices in turn are the signals that guide the allocation of resources.
EQ: What determines the supply of a good in a competitive market?

25. Summary
Economists use the model of supply and demand to analyze competitive markets.
In a competitive market, there are many buyers and sellers, each of whom has little or no influence on the market price.
EQ: What determines the supply of a good in a competitive market?

26. Summary
The demand curve shows how the quantity of a good depends upon the price.
According to the law of demand, as the price of a good falls, the quantity demanded rises. Therefore, the demand curve slopes downward.
In addition to price, other determinants of how much consumers want to buy include income, the prices of complements and substitutes, tastes, expectations, and the number of buyers.
If one of these factors changes, the demand curve shifts.
EQ: What determines the supply of a good in a competitive market?

27. Summary
The supply curve shows how the quantity of a good supplied depends upon the price.
According to the law of supply, as the price of a good rises, the quantity supplied rises. Therefore, the supply curve slopes upward.
In addition to price, other determinants of how much producers want to sell include input prices, technology, expectations, and the number of sellers.
If one of these factors changes, the supply curve shifts.
EQ: What determines the supply of a good in a competitive market?

28. Summary
Market equilibrium is determined by the intersection of the supply and demand curves.
At the equilibrium price, the quantity demanded equals the quantity supplied.
The behavior of buyers and sellers naturally drives markets toward their equilibrium.
EQ: What determines the supply of a good in a competitive market?

29. Assignment have a great weekend