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12/9 Warm-Up. What is the Law of Demand? 2. If a product has few substitutes, it will have ________________ demand. SUPPLY p. 235. Objective – Describe the determinants of Supply through notes and practice examples. SUPPLY. Supply: is the amount of goods or services available

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12/9 Warm-Up


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12 9 warm up
12/9 Warm-Up
  • What is the Law of Demand?
  • 2. If a product has few substitutes, it will have ________________ demand.
supply p 235

SUPPLY p. 235

Objective – Describe the determinants of Supply through notes and practice examples.

supply
SUPPLY
  • Supply: is the amount of goods or services available
  • The Law of Supply states the higher the price, the larger the quantity produced (think like a producer now; at a higher price firms earn additional revenue and more firms will have incentive to enter the market)
  • P S P S
supply1
SUPPLY
  • Market Supply Schedule
  • Supply Schedule: show only how price of goods changes the quantity supplied (all other factors remain constant)
  • Supply Curve: Graphic representation of the supply schedule. (rises from left to right)
  • y-axis = price
  • x-axis = quantity supplied
graphing supply
Graphing Supply

3.50

3.00

2.50

2.00

1.50

1.00

.50

S

Price $

0 50 100 150 200 250 300 350

Quantity Supplied of pizza slices

elasticity of supply
Elasticity of Supply
  • Elasticity of Supply is a measure of the way suppliers respond to a change in price
    • Elastic Supply – a small increase in price has a big effect on supply
elasticity of supply1
Elasticity of Supply
  • Inelastic Supply – an increase in price has a small effect on supply (orange farmers – suppliers must plant more trees every 2 years to produce more fruit and supply doesn’t change in the short term)
why would there be a shift change in supply1
WHY WOULD THERE BE A SHIFT (change) IN SUPPLY?
  • Change in the Price of an Input: Rise in input cost means decrease in supply because it is too expensive to make, and a fall in input cost will increase supply at all price levels.

As the cost of the inputs to make a car rise, then the production of cars will decline.

why would there be a shift change in supply2
WHY WOULD THERE BE A SHIFT (change) IN SUPPLY?
  • Technology – lowers cost and increases supply.

With improvements in technology producers are able to create more goods.

why would there be a shift change in supply3
WHY WOULD THERE BE A SHIFT (change) IN SUPPLY?
  • Government subsidy: payment by the gov’t that supports a business or market. Subsidies increase supply.

The government provides a subsidy to US farms, to encourage more production.

why would there be a shift change in supply5
WHY WOULD THERE BE A SHIFT (change) IN SUPPLY?
  • Government Regulation: (emission control on cars, FDA nutritional codes on food products) Usually increases cost of production and decreases supply.

As the government places more car emission regulations on cars, the producer must use money to meet these requirements. Therefore, less money goes towards production and supply declines.

why would there be a shift change in supply6
WHY WOULD THERE BE A SHIFT (change) IN SUPPLY?
  • Future expectation of Prices: expect the price to go up the supplier will store goods to sell more in future
why would there be a shift change in supply7
WHY WOULD THERE BE A SHIFT (change) IN SUPPLY?
  • Number of suppliers: as more suppliers enter a market to produce a good the market supply of the good will rise (and the opposite)
graphing supply1
Graphing Supply
  • Practice Graphing in Supply on p. 236 (in manual)
graphing supply2
Graphing Supply

S2

S1

.35

.30

.25

.20

.15

.10

.5

Price $

Shift to left - decrease in supply

0 100 200 300 400 500 600 700

Quantity Supplied of pencils

slide18
4a. Is the change in the supply of pencils, due to the cost of graphite, a shift in the curve or a movement along the curve? A shift

b. Has the supply of pencils increased or decreased? decreased

5. In these circumstances tell if the supply of pencils would increase or decrease.

a. Cost of wood decreases Increase

b. Decrease in productivity of the pencil factory Decrease

c. Increase in technology of pencil making Increase

d. Government issues restrictions on the type Decrease

of lead used in a pencil

e. Tax increase for the pencil factory Decrease

f. Subsidy to all pencil producers Increase

combining supply and demand p 237

Combining Supply and Demand p. 237

Objective: Explain how prices are set through supply and demand.

equilibrium
Equilibrium
  • Equilibrium: the point at which quantity demanded and quantity supplied are equal
  • At a point of equilibrium….
    • the price and quantity are balanced
    • the market for a good/service is stable

Point of equilibrium

Price

Qty

combining supply and demand
Combining Supply and Demand

Looking only at this Supply/Demand Schedule at what price will supply and demand be at EQUILIBRIUM?.............

Disequilibrium: any price or quantity not at equilibrium

Using the grid, plot the following points to draw a demand curve and a supply curve for CDs

combining supply and demand1
Combining Supply and Demand

S

25.00

20.00

15.00

10.00

5.00

2

Price $

E

1

Disequilibrium

3

D

0 10 20 30 40 50 60 70 80 90 100

Quantity

shortage
SHORTAGE
  • Excess Demand: when quantity demanded is more than quantity supplied (aka SHORTAGE!)

Price

SHORTAGE

Quantity

surplus
SURPLUS
  • Excess Supply: when quantity supplied is more than quantity demanded (aka SURPLUS!)

SURPLUS

Price

Quantity

shifts in the curves
Shifts in the Curves

A shift in the demand curve or the supply curve will result in a new equilibrium price.

A new equilibrium point

Price

Draw this in your notes

Quantity

shifts in demand and supply curves
Shifts in Demand and Supply Curves

Draw this in your notes!

S2

E3

S1

E2

E1

D2

D1

government intervention in a market economy
Government Intervention in a Market Economy
  • Price Ceiling: a maximum price that can be legally charged for a good or service (example: rent control)
  • Price Floor: a minimum price for a good or service

(example: minimum wage)

Price Ceiling

Price Floor

inflation and deflation
Inflation and Deflation
  • Inflation: a general increase in prices (over the years, prices rise and fall, but in the American economy, they have mostly risen)
  • Deflation: A substantial drop in the prices
understanding supply and demand
Understanding Supply and Demand
  • Start on the supply and demand practice on p. 239 and 240 of your manual.
  • Note: You will use the grid to graph supply, demand and a shift in supply and a shift in demand. (4 curves)
homework
Homework
  • 22.1, 23.1 reading guides, pp. 243-244
understanding supply and demand1
Understanding Supply and Demand

S1

S2

.60

.50

.40

.30

.20

.10

Price $

E2

E1

D1

D2

0 50 100 150 200 250 300 350

Quantity

warm up
Warm-Up
  • 1. Give an example of an elastic good.
  • 2. Give an example of an inelastic good.
  • 3. Give one reason why the demand curve may shift to the right.
  • 4. Give one reason why the supply curve would shift to the left.
  • 5. Give an example of complimentary goods (not one already in the notes).