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Basic Concepts and Principles
Learning Outcomes
• To discuss the key economic concepts like scarcity,
rationality, equilibrium and opportunity cost.
• To help the students analyse how decisions are made
about what, how and for whom to produce.
Indians splurge big on festive season sales,
buoying economy
What is Economics?
• Discusses how a society tries to solve the human
problems of unlimited wants and scarce resources.
• Scientific study of the choices made by individuals and
societies with regard to the alternative uses of scarce
resources employed to satisfy wants.
Basic Assumptions
• Ceteris Paribus
 Latin phrase
 “With other things remaining the same”
or “all other
 things being equal”.
• Rationality
 Consumers maximize utility subject to
given money
 income.
 Producers maximize profit subject to
Types of Economic Analysis
• Micro and Macro
– Microeconomics (“micro” meaning small): study of
the behaviour of small economic units
– Macroeconomics (“macro” meaning large): study of
aggregates.
Types of Economic Analysis
contd..
• Positive and Normative
– Positive economics: “what is” in economic matters
• Establishes a cause and effect relationship
variables.
• Analyzes problems on the basis of facts.
between
– Normative economics: “what ought to be” in
economic matters.
• Concerned with questions involving value judgments.
• Incorporates value judgments about what the economy
should be like.
Poll Time
Which of the following is a microeconomics
concern?
A) the reasons for a decline in average price level
B) the reasons why Naira buys less orange juice
C) the cause of why total employment may
decrease
D) the effect of the government budget deficit on
inflation
Which of the following is a macroeconomic
issue?
A) why plumbers earn more than janitors
B) the reasons for the rise in average prices
C) whether the army should buy more tanks or
more rockets
D) the reasons for a rise in the price of orange
juice
contd..
• Short Run and Long Run
– Short run: Time period not enough for consumers and
producers to adjust completely to any new situation.
– Long run: Time period long enough for consumers and
producers to adjust to any new situation.
Types of Economic Analysis
Types of Economic Analysis
contd..
• Partial and General Equilibrium
– Partial equilibrium analysis: Related to micro analysis
• Studies the outcome of any action in a single
market or consumer only.
• Equilibrium of one firm or few firms and not
necessarily the industry or economy.
– General equilibrium: explains economic phenomena
in an economy as a whole.
• State in which all the industries in an economy are
in equilibrium.
Economic Principles
• Concept of scarcity
– Unlimited human wants
– Limited resources available to satisfy such wants
– Best possible use of resources to get:
• maximum satisfaction (from the point of view of consumers) or
• maximum output (from the point of view of producers or firms)
• Concept of opportunity cost
– Opportunity cost is the benefit forgone from the alternative
that is not selected.
– Highlights the capacity of one resource to satisfy multitude of
wants
– Helps in making rational choices in all aspects of business,
since resources are scarce and wants are unlimited
• Concept of margin or increment
– Marginality: a unit increase in cost or revenue or
utility.
• Marginal cost: change in Total Cost due to a unit change in
output.
• Marginal revenue: change in Total Revenue due to a unit
change in sales.
• Marginal utility: change in Total Utility due to a unit change
in consumption.
– Incremental: applied when the changes are in bulk,
say 10% increase in sales.
Economic Principles
Contd…
Poll Time
Those things that must be forgone to acquire a
good are called:
A)substitutes
B)opportunity costs.
C)explicit costs.
D)competitors
Production Possibility Curve
• Highlights the concepts of scarcity and opportunity
cost.
– Indicates the opportunity cost of increasing one item's production
(or consumption) in terms of the units of the other forgone
– Slope of the curve in absolute terms
• Assumptions:
– The economy is operating at full employment.
– Factors of production are fixed in supply; they can however be
reallocated among different uses.
– Technology remains the same.
Food
Clothing
FQ
CQ
Q
FP
CP
P
O
PPC for the Society
Production Possibility Curve
Technically
Infeasible Area
Productively
Inefficient Area
 Shows the different
combinations of the quantities of
two goods that can be produced
(or consumed) in an economy at
any point of time.
 Below the curve is productively
inefficient area and above it is
technically infeasible area, so
the equilibrium will be at the
curve (FP and CP at point P).
 Depicts the trade off between
any two items produced (or
consumed).
 T
o increase the quantity of
clothing from CP to CQ some
amount of food (FP-FQ) will have
to be sacrificed. New point of
equilibrium on PPC is at Q.
Introductory Lecture
Learning Outcomes
• To discuss the effects of determinants of demand on
Demand Function.
• To discuss the causes of change in Demand.
Demand
 Demand: effective desire
 Demand is that desire which backed by willingness and ability to
buy a particular commodity.
 Amount of the commodity which consumers are willing to buy
per unit of time, at that price.
 Things necessary for demand:
 Time
 Price of the commodity
 Amount (or quantity) of the commodity consumers are willing
to purchase at the price
Types of Demand
 Direct and Derived Demand
 Direct demand is for the goods as they are such as Consumer
goods
 Derived demand is for the goods which are demanded to
produce some other commodities; e.g. Capital goods
 Recurring and Replacement Demand
 Recurring demand is for goods which are consumed at frequent
intervals such as food items, clothes.
 Durables are purchased to be used for a long period of time
 Wear and tear over time needs replacement
 Complementary and Competing Demand
 Some goods are jointly demanded hence are complementary in
nature, e.g. software and hardware, car and petrol.
 Some goods compete with each other for demand because
they are substitutes to each other, e.g. soft drinks and juices.
Determinants of Demand
 Price of the product
 Single most important determinant
 Negative effect on demand
 Higher the price-lower the demand
 Income of the consumer
 Normal goods: demand increases with increase in consumer’s
income
 Inferior goods: demand falls as income rises
 Price of related goods
 Substitutes
 If the price of a commodity increases, demand for its
substitute rises.
 Complements
 If the price of a commodity increases, quantity demanded of
its complement falls.
Determinants of Demand
Contd…
 Tastes and preferences
 Very significant in case of consumer goods
 Expectation of future price changes
 Gives rise to tendency of hoarding of durable goods
 Population
 Size, composition and distribution of population will
influence demand
 Advertising
 Very important in case of competitive markets
1. Holding all other factors constant, consumers demand
more of a good the
(a) higher its price.
(b) lower its price.
(c) steeper the downward slope of the demand curve.
(d) steeper the upward slope of the demand curve.
2. if the cost of making bicycles falls, the price goes
down, causing the demand curve to shift to the right.
 True
 False
Demand Function
 Interdependence between demand for a product and its
determinants can be shown in a mathematical functional
form
 Dx = f(Px, Y, Py, T, A, N)
 Independent variables: Px, Y, Py, T, A, N
 Dependent variable: Dx
 Px: Price of x
 Y: Income of consumer
 Py: Price of other commodity
 T: Taste and preference of consumer
 A: Advertisement
 N: Macro variable like inflation, population growth, economic
growth
Law of Demand
 A special case of demand function which shows relation between
price and demand of the commodity
Dx = f(Px)
 Other things remaining constant, when the price of a commodity
rises, the demand for that commodity falls or when the price of a
commodity falls, the demand for that commodity rises.
 Price bears a negative relationship with demand
Demand Schedule and Individual
Demand Curve
Point
on
Demand
Curve
Price (Rs
per cup)
Demand
(‘000
cups)
a 15 50
b 20 40
c 25 30
d 30 20
e 35 10
b
a
e
35
d
30
c
10 20 30
25
20
15
40 50
Quantity of coffee
O
Change in Demand
D1
D2
D0
Price
0
 Shift in demand curve from D0 to
D1
 More is demanded at same
price (Q1>Q)
 Increase in demand caused by:
 A rise in the price of a substitute
 A fall in the price of a
complement
 A rise in income
 A redistribution of income
towards those who favour the
commodity
 A change in tastes that favours
the commodity
0
Quantity  Shift in demand curve from D to
D2
 Less is demanded at each price
(Q2<Q)
P
Q1
Q
Q2
Which of the following will not cause a shift
in the demand curve?
A. Price
B. Population
C. Income
D. Taste and Prefrence
Exceptions to the Law of Demand
 Law of demand may not operate due to
the following
 reasons:
 Giffen Goods
 Snob Appeal
 Demonstration Effect
 Future Expectation of Prices (Panic buying)
 Addiction
 Neutral goods
 Life saving drugs
 Salt
 Amount of income spent
 Match box
Market Demand
 Market: interaction between sellers and buyers of a good
(or service) at a mutually agreed upon price.
 Market demand
 Aggregate of individual demands for a commodity at a
particular price per unit of time.
 Sum total of the quantities of a commodity that all buyers
in the market are willing to buy at a given price and at a
particular point of time (ceteris paribus)
 Market demand curve: horizontal summation of
individual demand curves
Thank You

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Microeconomic_Basic_Concepts_&_Principals[1] - Read-Only

  • 1. Basic Concepts and Principles
  • 2. Learning Outcomes • To discuss the key economic concepts like scarcity, rationality, equilibrium and opportunity cost. • To help the students analyse how decisions are made about what, how and for whom to produce.
  • 3. Indians splurge big on festive season sales, buoying economy
  • 4. What is Economics? • Discusses how a society tries to solve the human problems of unlimited wants and scarce resources. • Scientific study of the choices made by individuals and societies with regard to the alternative uses of scarce resources employed to satisfy wants.
  • 5. Basic Assumptions • Ceteris Paribus  Latin phrase  “With other things remaining the same” or “all other  things being equal”. • Rationality  Consumers maximize utility subject to given money  income.  Producers maximize profit subject to
  • 6. Types of Economic Analysis • Micro and Macro – Microeconomics (“micro” meaning small): study of the behaviour of small economic units – Macroeconomics (“macro” meaning large): study of aggregates.
  • 7. Types of Economic Analysis contd.. • Positive and Normative – Positive economics: “what is” in economic matters • Establishes a cause and effect relationship variables. • Analyzes problems on the basis of facts. between – Normative economics: “what ought to be” in economic matters. • Concerned with questions involving value judgments. • Incorporates value judgments about what the economy should be like.
  • 8. Poll Time Which of the following is a microeconomics concern? A) the reasons for a decline in average price level B) the reasons why Naira buys less orange juice C) the cause of why total employment may decrease D) the effect of the government budget deficit on inflation
  • 9. Which of the following is a macroeconomic issue? A) why plumbers earn more than janitors B) the reasons for the rise in average prices C) whether the army should buy more tanks or more rockets D) the reasons for a rise in the price of orange juice
  • 10. contd.. • Short Run and Long Run – Short run: Time period not enough for consumers and producers to adjust completely to any new situation. – Long run: Time period long enough for consumers and producers to adjust to any new situation. Types of Economic Analysis
  • 11. Types of Economic Analysis contd.. • Partial and General Equilibrium – Partial equilibrium analysis: Related to micro analysis • Studies the outcome of any action in a single market or consumer only. • Equilibrium of one firm or few firms and not necessarily the industry or economy. – General equilibrium: explains economic phenomena in an economy as a whole. • State in which all the industries in an economy are in equilibrium.
  • 12. Economic Principles • Concept of scarcity – Unlimited human wants – Limited resources available to satisfy such wants – Best possible use of resources to get: • maximum satisfaction (from the point of view of consumers) or • maximum output (from the point of view of producers or firms) • Concept of opportunity cost – Opportunity cost is the benefit forgone from the alternative that is not selected. – Highlights the capacity of one resource to satisfy multitude of wants – Helps in making rational choices in all aspects of business, since resources are scarce and wants are unlimited
  • 13. • Concept of margin or increment – Marginality: a unit increase in cost or revenue or utility. • Marginal cost: change in Total Cost due to a unit change in output. • Marginal revenue: change in Total Revenue due to a unit change in sales. • Marginal utility: change in Total Utility due to a unit change in consumption. – Incremental: applied when the changes are in bulk, say 10% increase in sales. Economic Principles Contd…
  • 14. Poll Time Those things that must be forgone to acquire a good are called: A)substitutes B)opportunity costs. C)explicit costs. D)competitors
  • 15. Production Possibility Curve • Highlights the concepts of scarcity and opportunity cost. – Indicates the opportunity cost of increasing one item's production (or consumption) in terms of the units of the other forgone – Slope of the curve in absolute terms • Assumptions: – The economy is operating at full employment. – Factors of production are fixed in supply; they can however be reallocated among different uses. – Technology remains the same.
  • 16. Food Clothing FQ CQ Q FP CP P O PPC for the Society Production Possibility Curve Technically Infeasible Area Productively Inefficient Area  Shows the different combinations of the quantities of two goods that can be produced (or consumed) in an economy at any point of time.  Below the curve is productively inefficient area and above it is technically infeasible area, so the equilibrium will be at the curve (FP and CP at point P).  Depicts the trade off between any two items produced (or consumed).  T o increase the quantity of clothing from CP to CQ some amount of food (FP-FQ) will have to be sacrificed. New point of equilibrium on PPC is at Q.
  • 18. Learning Outcomes • To discuss the effects of determinants of demand on Demand Function. • To discuss the causes of change in Demand.
  • 19. Demand  Demand: effective desire  Demand is that desire which backed by willingness and ability to buy a particular commodity.  Amount of the commodity which consumers are willing to buy per unit of time, at that price.  Things necessary for demand:  Time  Price of the commodity  Amount (or quantity) of the commodity consumers are willing to purchase at the price
  • 20. Types of Demand  Direct and Derived Demand  Direct demand is for the goods as they are such as Consumer goods  Derived demand is for the goods which are demanded to produce some other commodities; e.g. Capital goods  Recurring and Replacement Demand  Recurring demand is for goods which are consumed at frequent intervals such as food items, clothes.  Durables are purchased to be used for a long period of time  Wear and tear over time needs replacement  Complementary and Competing Demand  Some goods are jointly demanded hence are complementary in nature, e.g. software and hardware, car and petrol.  Some goods compete with each other for demand because they are substitutes to each other, e.g. soft drinks and juices.
  • 21. Determinants of Demand  Price of the product  Single most important determinant  Negative effect on demand  Higher the price-lower the demand  Income of the consumer  Normal goods: demand increases with increase in consumer’s income  Inferior goods: demand falls as income rises  Price of related goods  Substitutes  If the price of a commodity increases, demand for its substitute rises.  Complements  If the price of a commodity increases, quantity demanded of its complement falls.
  • 22. Determinants of Demand Contd…  Tastes and preferences  Very significant in case of consumer goods  Expectation of future price changes  Gives rise to tendency of hoarding of durable goods  Population  Size, composition and distribution of population will influence demand  Advertising  Very important in case of competitive markets
  • 23. 1. Holding all other factors constant, consumers demand more of a good the (a) higher its price. (b) lower its price. (c) steeper the downward slope of the demand curve. (d) steeper the upward slope of the demand curve.
  • 24. 2. if the cost of making bicycles falls, the price goes down, causing the demand curve to shift to the right.  True  False
  • 25. Demand Function  Interdependence between demand for a product and its determinants can be shown in a mathematical functional form  Dx = f(Px, Y, Py, T, A, N)  Independent variables: Px, Y, Py, T, A, N  Dependent variable: Dx  Px: Price of x  Y: Income of consumer  Py: Price of other commodity  T: Taste and preference of consumer  A: Advertisement  N: Macro variable like inflation, population growth, economic growth
  • 26. Law of Demand  A special case of demand function which shows relation between price and demand of the commodity Dx = f(Px)  Other things remaining constant, when the price of a commodity rises, the demand for that commodity falls or when the price of a commodity falls, the demand for that commodity rises.  Price bears a negative relationship with demand
  • 27. Demand Schedule and Individual Demand Curve Point on Demand Curve Price (Rs per cup) Demand (‘000 cups) a 15 50 b 20 40 c 25 30 d 30 20 e 35 10 b a e 35 d 30 c 10 20 30 25 20 15 40 50 Quantity of coffee O
  • 28. Change in Demand D1 D2 D0 Price 0  Shift in demand curve from D0 to D1  More is demanded at same price (Q1>Q)  Increase in demand caused by:  A rise in the price of a substitute  A fall in the price of a complement  A rise in income  A redistribution of income towards those who favour the commodity  A change in tastes that favours the commodity 0 Quantity  Shift in demand curve from D to D2  Less is demanded at each price (Q2<Q) P Q1 Q Q2
  • 29. Which of the following will not cause a shift in the demand curve? A. Price B. Population C. Income D. Taste and Prefrence
  • 30. Exceptions to the Law of Demand  Law of demand may not operate due to the following  reasons:  Giffen Goods  Snob Appeal  Demonstration Effect  Future Expectation of Prices (Panic buying)  Addiction  Neutral goods  Life saving drugs  Salt  Amount of income spent  Match box
  • 31. Market Demand  Market: interaction between sellers and buyers of a good (or service) at a mutually agreed upon price.  Market demand  Aggregate of individual demands for a commodity at a particular price per unit of time.  Sum total of the quantities of a commodity that all buyers in the market are willing to buy at a given price and at a particular point of time (ceteris paribus)  Market demand curve: horizontal summation of individual demand curves