1. markets, demand and supply. economic systems classifying economic systems –methods of...
TRANSCRIPT
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1. Markets, Demand and Supply
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Economic SystemsEconomic Systems
• Classifying economic systems
– methods of classification
– classification by degree of government control
• command economies
• free-market economies
• mixed economies
• Classifying economic systems
– methods of classification
– classification by degree of government control
• command economies
• free-market economies
• mixed economies
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Economic SystemsEconomic Systems
• The command economy– features of a command economy– planning
• consumption and investment• matching of inputs and outputs• distribution of output
• Advantages of a command economy– high investment, high and stable growth– social goals pursued– low unemployment
• The command economy– features of a command economy– planning
• consumption and investment• matching of inputs and outputs• distribution of output
• Advantages of a command economy– high investment, high and stable growth– social goals pursued– low unemployment
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Economic SystemsEconomic Systems
• Problems of a command economy
– problems of gathering information
– inefficient allocation of resources
– expensive to administer
– inappropriate incentives
– shortages and surpluses
– lack of response to consumer demand
• Problems of a command economy
– problems of gathering information
– inefficient allocation of resources
– expensive to administer
– inappropriate incentives
– shortages and surpluses
– lack of response to consumer demand
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Economic SystemsEconomic Systems
• The free-market economy– based on free decision making by
individuals and firms– demand and supply decisions– the price mechanism
• shortages and surpluses– shortage price rises– surplus price falls
• equilibrium price– where demand equals supply
• response to change in demand and supply
• The free-market economy– based on free decision making by
individuals and firms– demand and supply decisions– the price mechanism
• shortages and surpluses– shortage price rises– surplus price falls
• equilibrium price– where demand equals supply
• response to change in demand and supply
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Economic SystemsEconomic Systems
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
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Goods Market
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dg
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dguntil Dg = Sg
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Economic SystemsEconomic Systems
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dguntil Dg = Sg
Factor Market
Sg
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dguntil Dg = Sg
Factor Market
Sg Df
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dguntil Dg = Sg
Factor Market
Sg shortage(Df > Sf)
Df
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dguntil Dg = Sg
Factor Market
Sg shortage(Df > Sf)
Pf Df
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dguntil Dg = Sg
Factor Market
Sg shortage(Df > Sf)
Pf Sf
Df
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dguntil Dg = Sg
Factor Market
Sg shortage(Df > Sf)
Pf Sf
Df Df
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Goods Market
Dg shortage(Dg > Sg)
Pg Sg
Dguntil Dg = Sg
Factor Market
Sg shortage(Df > Sf)
Pf Sf
Df until Df = Sf
Df
The price mechanism:the effect of a rise in demand
The price mechanism:the effect of a rise in demand
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Economic SystemsEconomic Systems
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
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Economic SystemsEconomic Systems
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
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Economic SystemsEconomic Systems
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Competitive markets
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Competitive markets
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Economic SystemsEconomic Systems
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Competitive markets– perfectly competitive markets
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Competitive markets– perfectly competitive markets
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Economic SystemsEconomic Systems
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Competitive markets– perfectly competitive markets
– everyone is a price taker
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Competitive markets– perfectly competitive markets
– everyone is a price taker
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Economic SystemsEconomic Systems
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Competitive markets– perfectly competitive markets
– everyone is a price taker
– why study perfect markets?
• Interdependence of markets– effect of a rise in demand
• effect in market for that good
• effect in factor markets
• effect in other goods markets
• effect in other factor markets
• Competitive markets– perfectly competitive markets
– everyone is a price taker
– why study perfect markets?
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DemandDemand
• The relationship between demand and price– the income effect– the substitution effect
• The demand curve
• The relationship between demand and price– the income effect– the substitution effect
• The demand curve
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Quantity (tonnes: 000s)
Pri
ce (
pen
ce p
er k
g)
Price(pence per kg)
20
Market demand(tonnes 000s)
700A
Point
A
Market demand for potatoes (monthly)
Demand
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Quantity (tonnes: 000s)
Pri
ce (
pen
ce p
er k
g)
Price(pence per kg)
20
40
Market demand(tonnes 000s)
700
500
A
B
Point
A
B
Demand
Market demand for potatoes (monthly)
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Quantity (tonnes: 000s)
Pri
ce (
pen
ce p
er k
g)
Price(pence per kg)
20
40
60
Market demand(tonnes 000s)
700
500
350
A
B
C
Point
A
B
C
Demand
Market demand for potatoes (monthly)
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Quantity (tonnes: 000s)
Pri
ce (
pen
ce p
er k
g)
Price(pence per kg)
20
40
60
80
Market demand(tonnes 000s)
700
500
350
200
A
B
C
D
Point
A
B
C
D
Demand
Market demand for potatoes (monthly)
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Quantity (tonnes: 000s)
Pri
ce (
pen
ce p
er k
g)
Price(pence per kg)
20
40
60
80
100
Market demand(tonnes 000s)
700
500
350
200100
A
B
C
D
E
Point
A
B
C
D
E
Demand
Market demand for potatoes (monthly)
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DemandDemand
• Other determinants of demand
– tastes
– number and price of substitute goods
– number and price of complementary goods
– income
– distribution of income
– expectations
• Movements along and shifts in the demand curve
• Other determinants of demand
– tastes
– number and price of substitute goods
– number and price of complementary goods
– income
– distribution of income
– expectations
• Movements along and shifts in the demand curve
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D1
Pric
e
P
O Q0 Q1
Quantity
An increase in demand
D0
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SupplySupply
• Relationship between supply and price
– as price rises, firms supply more
• it is worth incurring the extra unit costs
• they switch from less profitable goods
• in the long run, new firms will be encourage dot enter the market
• The supply curve
• Relationship between supply and price
– as price rises, firms supply more
• it is worth incurring the extra unit costs
• they switch from less profitable goods
• in the long run, new firms will be encourage dot enter the market
• The supply curve
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Pri
ce (
pen
ce p
er k
g)
Quantity (tonnes: 000s)
Supply
a
P
20
Q
100a
Market supply of potatoes (monthly)
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Pri
ce (
pen
ce p
er k
g)
Quantity (tonnes: 000s)
Supply
a
b
P
20 40
Q
100200
ab
Market supply of potatoes (monthly)
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Pri
ce (
pen
ce p
er k
g)
Quantity (tonnes: 000s)
Supply
a
b
c
P
20 40 60
Q
100200350
abc
Market supply of potatoes (monthly)
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Pri
ce (
pen
ce p
er k
g)
Quantity (tonnes: 000s)
Supply
a
b
c
d P
20 40 60 80
Q
100200350530
abcd
Market supply of potatoes (monthly)
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Pri
ce (
pen
ce p
er k
g)
Quantity (tonnes: 000s)
Supply
a
b
c
d
e
P
20 40 60 80100
Q
100200350530700
abcde
Market supply of potatoes (monthly)
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SupplySupply
• Other determinants of supply
– costs of production
– profitability of alternative products
– profitability of goods in joint supply
– nature and other random shocks
– aims of producers
– expectations of producers
• Movements along and shifts in the supply curve
• Other determinants of supply
– costs of production
– profitability of alternative products
– profitability of goods in joint supply
– nature and other random shocks
– aims of producers
– expectations of producers
• Movements along and shifts in the supply curve
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P
QO
S0
Shifts in the supply curve
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P
QO
S0
Increase
S1
Shifts in the supply curve
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P
QO
S2 S0 S1
IncreaseDecrease
Shifts in the supply curve
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The Determination of PriceThe Determination of Price
• Equilibrium price and output
– response to shortages and surpluses
– significance of “equilibrium”
• Demand and supply curves
• Equilibrium price and output
– response to shortages and surpluses
– significance of “equilibrium”
• Demand and supply curves
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
The determination of market equilibrium (potatoes: monthly)
Quantity (tonnes: 000s)
E
D
C
B
Aa
b
c
d
e
Supply
Demand
Pri
ce (
pen
ce p
er k
g)
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The Determination of PriceThe Determination of Price
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
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The Determination of PriceThe Determination of Price
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• surplus price falls
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• surplus price falls
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0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Quantity (tonnes: 000s)
E
C
B
Aa
b
c
e
Supply
Demand
Pri
ce (
pen
ce p
er k
g)
D dSURPLUS
(330 000)
The determination of market equilibrium (potatoes: monthly)
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The Determination of PriceThe Determination of Price
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• surplus price falls
– effect of price being below equilibrium
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• surplus price falls
– effect of price being below equilibrium
![Page 52: 1. Markets, Demand and Supply. Economic Systems Classifying economic systems –methods of classification –classification by degree of government control](https://reader036.vdocument.in/reader036/viewer/2022081516/5697c00f1a28abf838cca705/html5/thumbnails/52.jpg)
The Determination of PriceThe Determination of Price
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• surplus price falls
– effect of price being below equilibrium• shortage price rises
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• surplus price falls
– effect of price being below equilibrium• shortage price rises
![Page 53: 1. Markets, Demand and Supply. Economic Systems Classifying economic systems –methods of classification –classification by degree of government control](https://reader036.vdocument.in/reader036/viewer/2022081516/5697c00f1a28abf838cca705/html5/thumbnails/53.jpg)
0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
Quantity (tonnes: 000s)
E
D
C
B
Aa
b
c
d
e
Supply
Demand
Pri
ce (
pen
ce p
er k
g)
SHORTAGE
(300 000)
The determination of market equilibrium (potatoes: monthly)
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The Determination of PriceThe Determination of Price
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• surplus price falls
– effect of price being below equilibrium• shortage price rises
– equilibrium: where D = S
• Equilibrium price and output– response to shortages and surpluses– significance of “equilibrium”
• Demand and supply curves– effect of price being above equilibrium
• surplus price falls
– effect of price being below equilibrium• shortage price rises
– equilibrium: where D = S
![Page 55: 1. Markets, Demand and Supply. Economic Systems Classifying economic systems –methods of classification –classification by degree of government control](https://reader036.vdocument.in/reader036/viewer/2022081516/5697c00f1a28abf838cca705/html5/thumbnails/55.jpg)
0
20
40
60
80
100
0 100 200 300 400 500 600 700 800
D d
Qe
Quantity (tonnes: 000s)
E
B
Aa
b
e
Supply
Demand
Pri
ce (
pen
ce p
er k
g)The determination of market equilibrium
(potatoes: monthly)
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The Determination of PriceThe Determination of Price
• Effects of shifts in the demand curve
– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the demand curve
– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
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Effect of a shift in the demand curveP
QO
Pe1
Qe1
S
D1
g
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P
QO
Pe1
Qe1
S
D1
g
Effect of a shift in the demand curve
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P
QO
Pe1
Qe1
S
D1
D2
g
Effect of a shift in the demand curve
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P
QO
Pe1
Qe1
S
g h
D1
D2
Pe2
Qe2
i
Effect of a shift in the demand curve
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The Determination of PriceThe Determination of Price
• Effects of shifts in the demand curve– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the supply curve
• Effects of shifts in the demand curve– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the supply curve
![Page 62: 1. Markets, Demand and Supply. Economic Systems Classifying economic systems –methods of classification –classification by degree of government control](https://reader036.vdocument.in/reader036/viewer/2022081516/5697c00f1a28abf838cca705/html5/thumbnails/62.jpg)
The Determination of PriceThe Determination of Price
• Effects of shifts in the demand curve– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the supply curve– movement along D curve and new S curve
• Effects of shifts in the demand curve– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the supply curve– movement along D curve and new S curve
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The Determination of PriceThe Determination of Price
• Effects of shifts in the demand curve– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the supply curve– movement along D curve and new S curve
• rise in supply (rightward shift) P falls
• Effects of shifts in the demand curve– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the supply curve– movement along D curve and new S curve
• rise in supply (rightward shift) P falls
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The Determination of PriceThe Determination of Price
• Effects of shifts in the demand curve– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the supply curve– movement along D curve and new S curve
• rise in supply (rightward shift) P falls
• fall in supply (leftward shift) P rises
• Effects of shifts in the demand curve– movement along S curve and new D curve
• rise in demand (rightward shift) P rises
• fall in demand (leftward shift) P falls
• Effects of shifts in the supply curve– movement along D curve and new S curve
• rise in supply (rightward shift) P falls
• fall in supply (leftward shift) P rises
![Page 65: 1. Markets, Demand and Supply. Economic Systems Classifying economic systems –methods of classification –classification by degree of government control](https://reader036.vdocument.in/reader036/viewer/2022081516/5697c00f1a28abf838cca705/html5/thumbnails/65.jpg)
Effect of a shift in the supply curveP
QO
Pe1
Qe1
D
S1
g
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P
QO
Pe1
Qe1
D
S1
g
Effect of a shift in the supply curve
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P
QO
Pe1
Qe1
D
S1
S2
g
Effect of a shift in the supply curve
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P
QO
Pe1
Pe3
Qe3Qe1
D
S1
S2
j g
k
Effect of a shift in the supply curve
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The Free-market EconomyThe Free-market Economy
• Advantages of a free-market economy
– transmits information between buyers and sellers
–no need for costly bureaucracy
– incentives to be efficient
–competitive markets respond to consumer wishes
• Advantages of a free-market economy
– transmits information between buyers and sellers
–no need for costly bureaucracy
– incentives to be efficient
–competitive markets respond to consumer wishes
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The Free-market EconomyThe Free-market Economy
• Problems of a free-market economy– competition may be limited
– inequality
– environment and social goals may be ignored
• The mixed economy– types of intervention
• use of taxes, subsidies and benefits
• legislation and regulation
• direct provision by the government
• Problems of a free-market economy– competition may be limited
– inequality
– environment and social goals may be ignored
• The mixed economy– types of intervention
• use of taxes, subsidies and benefits
• legislation and regulation
• direct provision by the government