Supply.

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Presentation transcript:

Supply

Supply Defined EXAMPLE: Mowing Lawns What is supply? Supply is the different quantities of a good that sellers are willing and able to sell (produce) at different prices. What is the Law of Supply? There is a DIRECT (or positive) relationship between price and quantity supplied. As price increases, the quantity producers make increases As price falls, the quantity producers make falls. Why? Because, at higher prices profit seeking firms have an incentive to produce more. EXAMPLE: Mowing Lawns

Example of Supply You own an lawn mower and you are willing to mow lawns. How many lawns will you mow at these prices? Price per lawn mowed Quantity Supplied Supply Schedule $1 $5 $20 $50 $100 $1000 3

GRAPHING SUPPLY Draw this large in your notes Supply Schedule Price of Cereal Draw this large in your notes $5 4 3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 4

GRAPHING SUPPLY Supply Schedule Price of Cereal Supply $5 50 $4 40 $3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 5

companies start making GRAPHING SUPPLY Supply Schedule What if new companies start making cereal? Price of Cereal Supply $5 4 3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 6

Change in Supply Supply Schedule Price of Cereal Supply $5 50 $4 40 $3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 7

Change in Supply Supply Schedule Price of Cereal Supply $5 50 $4 40 $3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 8

Change in Supply Supply Schedule Price of Cereal Supply $5 70 $4 60 $3 2 1 Price Quantity Supplied $5 70 $4 60 $3 50 $2 40 $1 10 30 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 9

Prices didn’t change but there is MORE cereal produced Change in Supply Supply Schedule Price of Cereal Supply S2 $5 4 3 2 1 Price Quantity Supplied $5 70 $4 60 $3 50 $2 40 $1 10 30 Increase in Supply Prices didn’t change but there is MORE cereal produced o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 10

destroys corn and wheat Change in Supply Supply Schedule What if a drought destroys corn and wheat crops? Price of Cereal Supply $5 4 3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 11

Change in Supply Supply Schedule Price of Cereal Supply $5 50 $4 40 $3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 12

Change in Supply Supply Schedule Price of Cereal Supply $5 50 $4 40 $3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 13

Change in Supply Supply Schedule Price of Cereal Supply $5 30 $4 20 $3 1 Price Quantity Supplied $5 30 $4 20 $3 10 $2 1 $1 10 0 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 14

Prices didn’t change but there is LESS cereal produced Change in Supply Supply Schedule Price of Cereal Supply S2 $5 4 3 2 1 Price Quantity Supplied $5 30 $4 20 $3 10 $2 1 $1 10 0 Decrease in Supply Prices didn’t change but there is LESS cereal produced o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 15

What if cereal companies find a quicker way to make Change in Supply Supply Schedule What if cereal companies find a quicker way to make cereal? Price of Cereal Supply $5 4 3 2 1 Price Quantity Supplied $5 50 $4 40 $3 30 $2 20 $1 10 o 10 20 30 40 50 60 70 80 Q Quantity of Cereal 16

6 Shifters (Determinants) of Supply Prices/Availability of inputs (resources) Number of Sellers Technology Government Action: Taxes & Subsidies 5. Opportunity Cost of Alternative Production 6. Expectations of Future Profit Changes in PRICE don’t shift the curve. It only causes movement along the curve.

Elasticity shows how sensitive quantity is to a change in price.

1. Elasticity of Demand Elasticity of Demand- Measurement of consumers responsiveness to a change in price. What will happen if price increase? How much will it effect Quantity Demanded Who cares? Used by firms to help determine prices and sales Used by the government to decide how to tax

Inelastic Demand

Inelastic Demand INelastic = Quantity is INsensitive to a change in price. If price increases, quantity demanded will fall a little If price decreases, quantity demanded increases a little. In other words, people will continue to buy it. A INELASTIC demand curve is steep! (looks like an “I”) Examples: Gasoline Milk Diapers Chewing Gum Medical Care Toilet paper

General Characteristics of INelastic Goods: Inelastic Demand General Characteristics of INelastic Goods: Few Substitutes Necessities Small portion of income Required now, rather than later

Elastic Demand

Elastic Demand An ELASTIC demand curve is flat! Elastic = Quantity is sensitive to a change in price. If price increases, quantity demanded will fall a lot If price decreases, quantity demanded increases a lot. In other words, the amount people buy is sensitive to price. An ELASTIC demand curve is flat! Examples: Soda Boats Beef Real Estate Pizza Gold

General Characteristics of Elastic Goods: Elastic Demand General Characteristics of Elastic Goods: Many Substitutes Luxuries Large portion of income Plenty of time to decide Elasticity coefficient greater than 1