Demand Lesson 3 Section 5.

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Presentation transcript:

Demand Lesson 3 Section 5

Supply and Demand: A Model of a Competitive Market Sellers and buyers constitute a “market”. A Competitive Market is where there are many buyers and sellers. The Supply and Demand model works well for competitive markets Demand Curve Supply Curve Factors that cause the supply and demand curves to shift Market equilibrium, equilibrium price, equilibrium quantity

Demand The Law of Demand The desire to own something, and the ability to pay for it. The Law of Demand As prices go up quantity demanded goes down. As prices go down quantity demanded goes up.

Demand Curve The demand curve is a downward sloping line showing the inverse relationship between quantity and price

Demand Schedule

Market Demand Demand curves can show the demand for an individual, or for a “market” of any defined size (classroom, CPHS, Pleasant Hill, etc.)

Shifts in demand Shifts in demand come from changes other than the change in price Changing technology Seasonal changes Good or bad news Income and inferior goods Consumer expectations Population Consumer taste and Advertising Substitute and Complimentary goods

Substitution Effect The substitution effect takes place when there is a similar product which can be substituted if the price of the original product becomes too high. Butter vs. Margarine Coke vs. Pepsi (or any other soda, drink)

Complimentary Goods Some goods go naturally together. When you buy product A, product B goes with it, so you buy them together. Cereal and milk Peanut butter and Jelly and Bread Skis and Ski poles and Ski Boots Flashlight and batteries

Income Effect As income rises, demand for “inferior” products goes down, while demand for superior products rise. Wal-Mart vs. Bloomingdales Generic products versus Name brands