Micro economics tools for health economics
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Transcript of Micro economics tools for health economics
Micro-economic Tools for
Health Economics
Abdur Razzaque Sarker MHE (Health Economics), MSS (Economics)
Health Economics and Financing Research Group
ICDDR,B
and
PhD Fellow in Strathclyde University, UK
Email: [email protected]
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Outline:
• Scarcity and opportunity cost • Efficiency • Demand • Supply • Market Equilibrium • Elasticity • Consumer Theory: Indifference Curve ,Utility and
Budget Constraint • Production Possibility Frontier • Supplier Induced demand
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Scarcity and Opportunity Costs
Scarcity means that there are not, and can never
be, enough resources to satisfy all human wants
and needs.
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Opportunity Cost: The cost of the foregone opportunity
Real cost of an activity (for example, provision of hospital services) as the other outputs that must be given up (for example, other health services such as immunizations, or non-health services or commodities such as defense or vehicles) because productive resources are committed to it.
Scarcity and Opportunity Costs
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Efficiency is an instrumental concept, it is always necessary
to specify clearly the outcome being sought or the ‘output’
being produced.
Efficiency
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Efficiency……!!!!!!!!!
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Elements of Efficiency
Do not waste resources
Produce each output at least cost
Produce the types and amounts of output that people
value most
These are the three main elements of efficiency
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Elements of Efficiency
Do not waste resources
Produce each output at least cost
Produce the types and amounts of output that people
value most
Production
Efficient Resource Allocation
Consumption
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Elements of Efficiency
Do not waste resources
Produce each output at least cost
Produce the types and amounts of output that people
value most
Production
Efficient Resource Allocation
Consumption
Supply and Demand
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Elements of Efficiency
Do not waste resources
Produce each output at least cost
Produce the types and amounts of output that people
value most
Technical Efficiency Cost-effective
efficiency Allocative Efficiency
Technical efficiency requires that for any given amount of output, the amount of inputs
used to produce it is minimized (e.g. hospital…??)
It requires that, in addition to technical efficiency being attained, inputs be combined
so as to minimize the cost of any given output
Resources be used to produce the types and amounts of outputs which best satisfy
people
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Allocative Efficiency
Example…!!
If mothers of young children want counseling services
for behavioral problems instead of frequent well-child
check-ups, then allocative efficiency might be improved by
changing the mix of primary care services even if the well
child examinations were being provided cost effectively
If producers are supplying too much or too little of any
good or service relative to consumers' wishes it leads to
allocative inefficieny
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Doing the right things
Doing things right
Elements of Efficiency
Do not waste resources
Produce each output at least cost
Produce the types and amounts of output that people
value most
Technical Efficiency Cost-effective
efficiency Allocative Efficiency
Efficiency means both 'doing things right' (technical efficiency and cost-effectiveness), and 'doing the right things' (allocative efficiency) Pareto Efficiency..?????
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Demand
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Demand :How much of a good a consumer is ready to buy at a certain price, holding other things constant.
Factors affecting demand of a good:
Good’s own price
Income of the consumer
Price of related goods
Tastes/preferences
Various sociological factors
Factors outside human control, such as the weather
Law of demand
• The law of demand states that; the higher the price of a good the lower the quantity demanded
• If Price increases then Quantity demanded decrease
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Demand Schedule
Price Quantity demanded
30 TK/KG 6 KG
40 TK/KG 4 KG
50 TK/KG 3 KG
60 TK/KG 2 KG
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Deriving a Demand Curve
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Downward sloping demand
curve
Price
4 3 6 2
60
50
40
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Quantity demanded
Demand Curve shows the relationship between the
price of a good and quantity demanded of the good
Movement Vs Shift of Demand Curve
• We move along the demand curve only when the price of the good changes
Demand curve shifts because of:
• Change in income
• Change in price of a substitute
• Change in price of a complement
• Change in tastes and preference
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Other Economic Factors Affecting
Demand
• If income increases, then at any given price, consumer is willing and able to purchase more q
18 q0 q1
Price
P0
DO D1
Physician Visits
Other Economic Factors Affecting Demand
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Substitutes - Goods which satisfy the same needs of the
consumer and therefore can replace each other in use
e.g. Coke and Pepsi
e.g. Butter and Jam
e.g. CNG gas and Petrol
Other Economic Factors Affecting
Demand
• e.g. Coke and Pepsi
• If price of Coke increases, D for Pepsi___
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P
D0 D1
Demand for Pepsi
Demand for Pepsi----
Other Economic Factors Affecting Demand
Complements -
• Two goods are complementary if using more of good A
requires use of more good B.
• When two goods are consumed together
e.g. left shoe and right shoe e.g. DVD players and DVDs e.g. Tea and Sugar e.g. Car and Petrol
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Other Economic Factors Affecting
Demand
• If Price of petrol become cheaper, consumption or demand for car increases___
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2. Complements
P petrol
D0 D1
Quantitiy of petrol demanded
Price of car falls
(Price of petrol unchanged)
Supply:
The amount of a good, a producer/seller is ready to sell at a given price, holding other things constant.
Factors affecting supply of a good:
• The price of the good
• Technology
• Price of input
• Gov’t policies and regulations
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Supply
Law of Supply
• All other factors remaining unchanged; as the price of a good increases, the quantity of the good offered by a supplier increases and vice versa.
• Price increases quantity supplied increases
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Supply Schedule
Price Quantity Supplied
30 TK/KG 2 KG
40 TK/ KG 4 KG
50 TK/ KG 6 KG
60 TK/KG 8 KG
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Deriving a Supply Curve
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Supply curve shows the relationship between price
and quantity supplied of a good; ceteris paribus
Price
P1
P0
q0 q1
Supply curve is upward sloping
Other Economic Factors Affecting Supply
• If price of factors of production (land, labor, capital) increases i.e. cost of production increases, then at any given quantity, producer charge more prices.
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1. Cost of production
q0
Price
P0
SO S1
Physician Visits
P1
Other Economic Factors Affecting Supply
• If technology improves, then at any given price, producer will be willing to sell more
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2. Technological Improvement
q0
Price S0
Physician Visits
P0
q1
S1
The market
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Quantity per time period
Price
D
S
PE
QE
Equilibrium
P1> PE [excess supply]
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Quantity per time period
Price
D
S
PE
QE QS QD
P1
If there is Excess Supply in the market then there will be an downward
pressure in price and price will decrease until it reaches the equilibrium
P1< PE [Excess demand]
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Quantity per time period
Price
D
S
PE
QE QS QD
P1
If there is ED in the market then there will be an upward pressure in
price and price will increase until it reaches the equilibrium
Elasticity – the concept
If price rises by 10% - what happens to demand?
We know demand will fall
HOW MUCH?
3 Possibilities-
1. By more than 10%?
2. By less than 10%
3. Not more or not less than 10%
That means in the first cases the responsiveness is more. And........
Elasticity measures the extent to which demand will change
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If demand changes a lot when the price changes, we
say that demand is relatively elastic
If demand changes only slightly when price increases,
we say it is relatively inelastic.
Elasticity of Demand
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Elasticity
Price (£)
Quantity Demanded
10
D
5
5
6
Govt decides to lower price to attract utilization
Not a good move!
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Elasticity
Price (£)
Quantity Demanded
D
10
5 20
Govt. decides to reduce price to increase usages
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Good Move!
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Elasticity
When we see an elasticity larger than -1 it is elastic
demand, meaning a change in price has a relatively large
impact on demand
If the elasticity is between 0 to -1, it is inelastic demand –
the percentage change in demand is smaller than the
percentage change in price
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Consumer theory
• The consumer will choose the best bundle he can afford
• The theory has two parts:
– What do we mean by best bundle
– What a consumer can afford
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Consumer Preference
• Three assumptions:
– Completeness: Consumer can clearly describe his preferences over different bundles . He is able to clearly say whether he is indifferent between two bundles A and B or whether he prefers one over another .
– Transitivity: If A is preferred to B and B is preferred to C, then A must be preferred to C.
– Non-satiation : More is always better.
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Preference Map
• Preference Map: If a consumer’s preferences/ behavior satisfies this three assumptions then we can put his preferences into a graph. Preference map is a graphical representation of a consumer’s preference. It is the collection of all indifference curves.
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Indifference Curve
• Indifference curve is the combination of all consumption bundles among which the consumer is indifferent.
2
1
1 2
IC1
Movie
pizza
A
B
C
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Properties of Indifference Curve
• Consumer always prefers higher indifference curve (further from the origin).
• Indifference curves are downward sloping
• Any two indifference curves can not cross each other.
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Marginal Rate of Substitution
• The MRS measures the amount of one product a consumer must be given to compensate for giving up one unit of the other.
• The slope of the Indifference curve is MRS= -
• MRS is not constant, it varies over the indifference curve
• As we move down along the IC, MRS falls.
2
1
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Budget Constraint
• The budget constraint indicates the set of bundles the consumer can afford with a given income
• Slope of the budget constraint to the right is Pc/Pb, and measures how much beef must be sacrificed to get one more pound of chicken
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Consumer Equilibrium
• To maximize satisfaction given a budget constraint, the consumer will seek the highest attainable indifference curve
• Consumer will choose the point at which indifference curve is tangent to the budget line.
• In the diagram to the right, point A on indifference curve U2 represents the best the consumer can do
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Production Possibility Frontier
• A curve that shows which alternative combinations of commodities can just be attained if all resources are used; it is thus the boundary between attainable and unattainable commodity combinations.
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Production Possibility Frontier
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Externalities
• Externality—Actions of one party make another worse/better off, yet the first party does not bear these costs or receive these benefits
• Negative Externality – Second hand smoking, spread of a contagious disease by a person who rides a public bus, driving while intoxicated and injuring another
• Positive Externality –using a condom, deworming
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The Agency Relationship
A doctor-patient relationship is most frequently seen as one of agency
The patients (principals) are less informed than doctors (agents) about the relationship between healthcare and health.
The perfect agent physician chooses the health services as the patient himself would choose if only the patient possessed the information that the physician does.
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Imperfect Agency and Supplier-Induced Demand (SID)
Supplier-induced demand (SID) refers to the phenomenon of physicians deviating from their agency responsibilities to provide care for their self-interests rather than their patient interests
SID represents one of the major intellectual and policy controversies in health economics.
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Reinhardt Fee Test of Inducement
Q1 Q2 Q3 Q4
P4
P1
P3
P2
Utilization of
Healthcare
Price of
Healthcare
D1
D2
D3
S1
S2
References:
• Philip Jacobs (1991), The Economics of Health and Medical Care. Third Edition, Aspen Publishers Inc.
• S. Folland, A.C. Goodman and M. Stano (2000), The Economics of health and health Care, Macmillan, 3rd edn.
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Thanks