Chapter 4.1 What Is Demand?
An Introduction to Demand Demand leads to competition Desire, ability and willingness Microeconomics Behavior/decisions of one person/family/firm Demand lets us answer the economic questions
Demand Illustrated We can put demand in a table, like this: This is called a demand schedule We can also graph it in a Demand Curve: Price Quantity Demanded $20 1 $15 3 $10 7 $5 13
Let’s Try one!
The Law of demand Law of demand Price & Quantity Demanded are inversely related What does that mean? Price goes up, quantity goes down That’s why the demand curve is always downward sloping!
Normal Goods (this isn’t in the book!) Regular well behaving goods Some things don’t behave very well Gasoline Milk Hamburger Why do you think they “misbehave”?
Market Demand If we can determine demand for one we can do it for all! Price Quantity Jeff Quantity Sara Quantity Market 20 1 15 3 2 5 10 7 12 13 23
Demand & Marginal Utility “For the next one” Marginal Utility Utility “for the next one” Diminishing marginal utility Ever eat your favorite candy bar? How about several of them? What happens after the 3rd? 4th? 12th?