Demand Notes
Demand:
Quantities of a particular good or service consumers are willing and able to buy at different possible prices at a
particular time
Warm Up: I’m going to sell an A on the next test. Each student is to
submit a sealed bid. The bids are cumulative.
What behavioral relationship
do you see?
Law of Demand/Price effect:
Consumers buy more of something if it costs less and less of something
if it costs more
Two sub-concepts to Demand:
A. Quantity: Consumers are able and willing to buy @different prices
B. Price: When prices
increase people buy less
Demand Curve: Is Illustrated as an upward sloping
curve with Quantity on
the horizontal axis and Price on the Vertical axis
A change in Demand means at every price different quantities will
be supplied
Demand Is a Forecasting Device:
By anticipating consumer behavior if one incentive changes (price)
Change in Demand is not always a change in Quantity demanded
A. A change in quantity demanded is caused by
price indicated by movement along the curve
Ie. Quantity is a street and only a change in price can move you up and down the street
B. A change in quantity demanded is indicated as a shift of
the curve itself
Ie. A change in demand determinants
like income, tastes, number of buyers, prices of complementary or substitute goods, or consumer expectations moves you to
a different street
What does it matter?
Businesses need to know
and beware that:
Only a decrease in prices
can increase quantity demanded
The only way to raise
prices is to have an increase in demand
Supply Notes
Supply:
The relationship between price and quantity of goods or services firms are willing to produce.
Warm Up:
How many of you would do 20 good push ups for an extra credit point on the Supply and Demand Test?
For 2 Extra Credit Points
For 3 Extra Credit Points
For 4 Extra Credit Points
Law of Supply:
The higher the price, the greater the quantity supplied
Two sub concepts:
A. Quantity :
What producers are willing to provide at given prices
B. Price:
When items cost more, producers produce more. When items cost less, producers
produce less
Supply Curve:
Illustrated as an upward sloping curve with Quantity on the horizontal
axis and Price on the Vertical axis
A change in supply means at every price different quantities will
be supplied
Supply is a Forecasting Device:
It anticipates what producers will do if a single incentive (Price)
is changed
A change in supply is different from quantity supplied
A. A change in quantity supplied is caused by price. It is movement along the curve itself
Ie. Quantity is a street and
only a change in price
can move you up and
down the street
B. A change in supply is due to things other than price.
It is movement of the curve itself due to:
1. Technology
2. Production costs
3. Taxes
4. Subsidies
5. Expectations
Ie. A change in demand determinants
like
The ones listed above
move you to a different
street
Vocabulary
Demand
Buying power
Price elasticity of demand
change in demand
price effect/law of demand
market demand
supply
elastic supply
market supply
decrease in supply
price effect/law of supply
inelastic supply