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SUPPLYSUPPLY
DemandDemand’’s Partners Partner
SupplySupply
 Is the quantity of a good or service thatIs the quantity of a good or service that
sellers aresellers are ableable andand willingwilling to sell at ato sell at a
specific price in a particular period of timespecific price in a particular period of time
AbbreviationsAbbreviations
PP = price= price
QsQs = quantity supplied= quantity supplied
Law of SupplyLaw of Supply
When P , QsWhen P , Qs
When P , QsWhen P , Qs
How sellers think!How sellers think!
 Buyers and sellers look at high and low pricesBuyers and sellers look at high and low prices
differentlydifferently
 Buyers are discouraged by high pricesBuyers are discouraged by high prices  they buythey buy
less and look for substitute productsless and look for substitute products
 Sellers are encouraged by high pricesSellers are encouraged by high prices  they want tothey want to
produce and sell moreproduce and sell more
S
Q
P
P1
P0
Qs0 Qs1
Change in Price
P
P0
P1
Q
S
Qs0Qs1
P , Qs P , Qs
Movement along the curve caused by P
A Change in PriceA Change in Price
 Causes movement along the supply curveCauses movement along the supply curve
and anand an ∆∆ in quantity supplied.in quantity supplied.
 AnAn ∆∆ in quantity supplied means that onlyin quantity supplied means that only
thethe priceprice has changed and a new quantityhas changed and a new quantity
is supplied along a constant supply curve.is supplied along a constant supply curve.
Change in Supply –
Not caused by change in Price
1. Change in environmental conditions
2. Change in technology
3. Change in resource prices
4. Change in the number of suppliers
Results in a shift of the supply curve
Change in Weather –
Market for Oranges
P P
P
P
Q1 Q0 Q1Q0
Q Q
S1
S0
S1
S0
Bad weather – less is
supplied to the market
= S
Good weather – more is
supplied to the market
= S
Change in Resource Prices –
Market for Pork Production
P
P
Q1 Q0
Q
S1
S0
Due to increase in resource prices
less is supplied to the market
= S
Increased costs due to
Increased:
•Wages
•Pig feed costs
•Manufacturing costs
Note: feed costs for
pig farmers = an in
resource prices.
Therefore S
Change in Resource Prices –
Market for Air Canada Flights
P
P
Q0 Q1
Q
S0
S1
Due to decrease in resource prices
– more is supplied to the market
= S
If workers agree to a
in wages = a in
Production costs,
Therefore, S
“Key words” to
recognize a in Supply
= manufacturing, costs,
inputs, wages, labour
costs, production,
producers
Change in Technology –
Market for Cars
P
P
Q0 Q1
Q
S0
S1
If a new technology makes
production easier, saves
time, more efficient, less
labour, etc. = S
Due to decrease in production costs
– more is supplied to the market
= S
Change in the number of Suppliers
P
P
Q0 Q1
Q
S0
S1
The creation of “The
National Post” = a new
supplier = S
P
P
Q1 Q0
Q
S1
S0
The acquisition of Chapters
by Indigo will result in the
closing of some Chapters
stores = S
Market for
Newspapers
Market for
Bookstores
Change in S not causedChange in S not caused
by a change in Priceby a change in Price
 S = S curve shifts out, to the rightS = S curve shifts out, to the right
 S = S curve shifts in, to the leftS = S curve shifts in, to the left
AA ∆∆ in Supplyin Supply
 AA ∆∆ (increase or decrease) in supply or a(increase or decrease) in supply or a
shift in supply means that a change inshift in supply means that a change in
amount supplied occurs because a shift inamount supplied occurs because a shift in
the position of the supply curve.the position of the supply curve.

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Supply

  • 2. SupplySupply  Is the quantity of a good or service thatIs the quantity of a good or service that sellers aresellers are ableable andand willingwilling to sell at ato sell at a specific price in a particular period of timespecific price in a particular period of time
  • 3. AbbreviationsAbbreviations PP = price= price QsQs = quantity supplied= quantity supplied
  • 4. Law of SupplyLaw of Supply When P , QsWhen P , Qs When P , QsWhen P , Qs
  • 5. How sellers think!How sellers think!  Buyers and sellers look at high and low pricesBuyers and sellers look at high and low prices differentlydifferently  Buyers are discouraged by high pricesBuyers are discouraged by high prices  they buythey buy less and look for substitute productsless and look for substitute products  Sellers are encouraged by high pricesSellers are encouraged by high prices  they want tothey want to produce and sell moreproduce and sell more
  • 6. S Q P P1 P0 Qs0 Qs1 Change in Price P P0 P1 Q S Qs0Qs1 P , Qs P , Qs Movement along the curve caused by P
  • 7. A Change in PriceA Change in Price  Causes movement along the supply curveCauses movement along the supply curve and anand an ∆∆ in quantity supplied.in quantity supplied.  AnAn ∆∆ in quantity supplied means that onlyin quantity supplied means that only thethe priceprice has changed and a new quantityhas changed and a new quantity is supplied along a constant supply curve.is supplied along a constant supply curve.
  • 8. Change in Supply – Not caused by change in Price 1. Change in environmental conditions 2. Change in technology 3. Change in resource prices 4. Change in the number of suppliers Results in a shift of the supply curve
  • 9. Change in Weather – Market for Oranges P P P P Q1 Q0 Q1Q0 Q Q S1 S0 S1 S0 Bad weather – less is supplied to the market = S Good weather – more is supplied to the market = S
  • 10. Change in Resource Prices – Market for Pork Production P P Q1 Q0 Q S1 S0 Due to increase in resource prices less is supplied to the market = S Increased costs due to Increased: •Wages •Pig feed costs •Manufacturing costs Note: feed costs for pig farmers = an in resource prices. Therefore S
  • 11. Change in Resource Prices – Market for Air Canada Flights P P Q0 Q1 Q S0 S1 Due to decrease in resource prices – more is supplied to the market = S If workers agree to a in wages = a in Production costs, Therefore, S “Key words” to recognize a in Supply = manufacturing, costs, inputs, wages, labour costs, production, producers
  • 12. Change in Technology – Market for Cars P P Q0 Q1 Q S0 S1 If a new technology makes production easier, saves time, more efficient, less labour, etc. = S Due to decrease in production costs – more is supplied to the market = S
  • 13. Change in the number of Suppliers P P Q0 Q1 Q S0 S1 The creation of “The National Post” = a new supplier = S P P Q1 Q0 Q S1 S0 The acquisition of Chapters by Indigo will result in the closing of some Chapters stores = S Market for Newspapers Market for Bookstores
  • 14. Change in S not causedChange in S not caused by a change in Priceby a change in Price  S = S curve shifts out, to the rightS = S curve shifts out, to the right  S = S curve shifts in, to the leftS = S curve shifts in, to the left
  • 15. AA ∆∆ in Supplyin Supply  AA ∆∆ (increase or decrease) in supply or a(increase or decrease) in supply or a shift in supply means that a change inshift in supply means that a change in amount supplied occurs because a shift inamount supplied occurs because a shift in the position of the supply curve.the position of the supply curve.