The document provides an introduction to economics. It discusses [1] how economics deals with scarce resources and unlimited wants, posing problems of what, how, and for whom to produce goods and services, [2] the different types of resources including land, labor, capital, and entrepreneurial talent, and [3] some objectives and pitfalls of economic reasoning including efficiency, equity, and avoiding logical fallacies.

1. Introduction to Economics
A Presentation by
Anamitra Roy

2. Introduction to Economics
“The Science of
Economics is made
for the benefit and
development of the
world.”
- Chanakya

3. Economic Problems
• Unlimited Wants
• Scarce Resources –
Land, Labour,
Capital, …..
• Resource Use
• Choices

4. Economic Problems
(continued)
The problem of ‘choice making’ arising out of limited
means and unlimited wants is called economic problem.
Why do economic problems arise?
Unlimited wants
Different priorities
Limited means
Means having alternative uses
Multiplicity of want

5. Types of Resources
Land: naturally occurring resources whose
supply is inherently fixed (i.e., does not
respond to changes in price)
Labor: the physical work that is needed to make
the products or provide the services.
Capital: the machines that is used to produce
the products.
Entrepreneurial Talent: the bright ideas that
people contribute to making or improving the
goods and services.

6. Economic Problems

7. What goods and services should an economy produce?
– should the emphasis be on agriculture, manufacturing or
services, should it be on sport and leisure or housing?
How should goods and services be produced? – labour
intensive, land intensive, capital intensive? Efficiency?
Who should get the goods and services produced? –
even distribution? more for the rich? for those who work
hard?
Economic Problems
(continued)

8. Oikonomous – ‘one who manage household’
Economics is the study of how societies use scarce
resources to produce valuable commodities and
distribute them among differ ent people .
What is Economics?

9. Objectives
To understand the subject matter & the
essence of Economics and Managerial
Decision-Making
Managerial Economics: It refers to the application of
economic theory & the tools of analysis of decision
science to examine how an organization can achieve its
aims or objectives most efficiently. It studies the
economic aspects of managerial decision making

10. Maximizing the value of the firm
(Through profit maximization)
Alternative objectives:
=>Market share maximization
=>Growth Maximization
=>Maximizing their own benefits
Managers’ Objectives

11. Market
Conditions
Factor
Prices
Economic
Conditions
Managerial
Problems
Managerial Decision
Company’s
Performance
Market
Conditions

12. Why do we study Economics?
You are the manager of your own business firm.
For taking any decision for your firm what
variables should you consider?

13. Why do we study Economics?
• To Learn a Way of Thinking
• To Understand the Society
• To Understand Global Affairs
• To Be An Informed Voter

14. To Learn a Way of
Thinking
• Opportunity Cost
• Marginalism
• Sunk Cost
• Efficient Market

15. Opportunity Cost
Definition – the cost expressed in terms of the next
best alternative sacrificed
When a particular alternative is chosen from a set of
alternatives it implies sacrificing the other alternatives
The cost of the forgone alternatives is the opportunity
cost of the decision
Helps us view the true cost of decision making
Implies valuing different choices
Example : Firm purchases a new piece of equipment
for Rs.10,0000 to generate more profit, this amount
could have been deposited in an interest- earning
account.

16. Marginalism
Definition : The process of analysing the additional or
incremental costs or benefits arising from a choice or
decision
It should not be confused with average.
Example : Marginal labor unit  Marginal
output of labor , Marginal revenue 
Additional unit sold

17. Sunk Cost
• Definition : Costs that can not be avoided,
regardless of what is done in the future,
because they have already been incurred
Example : For an airplane that is about to take off with
empty seats, the marginal costs of an extra passenger is
zero, but giving a big discount for a few seats will be
profitable

18. Efficient Market
• Definition: A market in which profit
opportunities are eliminated almost
instantaneously.

19. Why do we study Economics?
• Economic knowledge serves us in
managing our personal lives, in
understanding society and in improving the
world around us.
• The ways that economics can help us
individually will be as different as are our
personal lives.

20. • Learning about stock market may help
people manage their own finances.
• Better awareness of the determinants of
cost and revenue will produce better business
decisions.
• The doctor, the investor and the farmer all
need to know about profit from their
businesses.
Why do we study Economics?

21. Scope of Economics: Micro
Economics
• The study of how households and firm
make decisions and how they interact in
specific markets
• Examples: impact of foreign competition
on the Indian automobile industry

22. Scope of Economics: Macro
Economics
• The study of economy-wide phenomena
• Examples: the effect of borrowing by the
Indian government, When politicians talk
about “the economy” being in recession
they are talking about Macroeconomics.

23. Methods of Economics
Positive Economics
Purely descriptive statements or scientific predictions; “If
A, then B,” a statement of what is (attempts to describe the
world as it is ).
Eg.: Minimum wage law cause unemployment.
Normative Economics
Analysis involving value judgments; relates to whether
things are good or bad, a statement of what ought to be
(attempts to prescribe how the world should be).
Eg.: The Govt. should raise the minimum wage.

24. Descriptive Economics and
Economics Theory
Descriptive Economics
The compilation of data that describe phenomena and facts.
Eg.: Economic survey of India publish many data related to
economics.
Economic Theory
A statement or set of related statements about cause and
effect ,action and reaction.
Eg.: The Law of Demand, Law of Supply etc.

25. Theories and Models
A model is a formal statement of a theory, usually a
mathematical statement of a presumed relationship
between two or more values.
Variable is a measure that can change from time to time
or from observation to observation.
Ceteris Paribus / all else equal : A device used to
analyse the relationship between two variables while the
values of other variables are held unchanged.

26. • In all areas of economics, old and new, certain
pitfalls lie in the path of the serious economist.
• Falling to keep “others Things Equal”
• The Post Hoc Fallacy
• Fallacy of Composition
Pitfalls in Economic Reasoning

27. Most of economic problems involve
several forces interacting at the same time.
E.g..: the number of cars bought in a given
year is determined by the price of cars,
consumer incomes, gasoline prices etc.
How can we isolate the impact on car sales
of a single variable such as the price of
gasoline.
Others Things Equal

28. The Post Hoc Fallacy
• A common mistake in studies of cause-and-effect
relationships is the Post Hoc Fallacy.
E.g.: Dr. Optimist’s observation is that after the
Government has cut tax rates, the Government’s total
tax revenues began to rise. Dr.Optimist then claims
“Aha, if we lower the tax rates, we will rise revenues
and reduce the budget deficit.”

29. The Post Hoc Fallacy
Dr.Optimist fallacy was to assume that the
tax cut was responsible for the increase in
Govt.s revenues; overlooked was the fact that
the growing economy was raising people’s
income and might have increased tax
revenues even more had taxes not been cut.

30. The Fallacy of Composition
The erroneous belief that what is true for a
part is necessarily true for the whole.
Example : Increasing saving is obviously good
for an individual, since it provides for retirement or
a "rainy day," but if everyone saves more, it may
cause a recession by reducing consumer demand.

31. Economic Policy
Efficiency : An efficient economy is one that produces
what people want at the least possible cost.
Equity : It is a concept or idea of fairness in
Economics.
Economic Growth : A sustainable rise in per Capita
Income overtime.
Stability : A condition in which national output is
growing steadily , with low inflation and full employment
of resources.

32. The Circular-Flow Diagram
Firms Households
Market for
Factors
of Production
Market for
Goods
and Services
Spending
Revenue
Wages, rent,
interest and
profit
Income
Goods &
Services sold
Goods &
Services
bought
Labor, land,
and capital
Inputs for
production

33. COMBINATION CLOTH
(METER)
STEEL
(TON)
A 0 18
B 1 17
C 2 15
D 3 12
E 4 7
F 5 0

34. COMBINATION CLOTH
(METER)
STEEL
(TON)
OPPORTUNITY
COST OF CLOTHS
(TONS OF STEEL)
A 0 18 0
B 1 17 1
C 2 15 2
D 3 12 3
E 4 7 5
F 5 0 7

35. PRODUCTION POSSIBILITY
FRONTIER
PRODUCTION POSSIBILITY FRONTIER
0
2
4
6
8
10
12
14
16
18
20
0 1 2 3 4 5 6
CLOTH
STEEL
A graph that shows all
the combination of
goods and services that
can be produced if all of
society's resources are
used efficiently - P.P.F.
Slope = Marginal rate
of Transformation
Law of Increasing
Opportunity Cost

36. Alternative
Economic System
Economic
System
Market Economy
Command
Economy
Mixed Economy

37. General Equilibrium
A General equilibrium is defined as a situation
in which all markets and all decision making
units are simultaneously in equilibrium and
each market is interrelated.

38. Theories of International
Trade
Absolute Advantage: A producer has an
absolute advantage over another in the
production of a good or services if it can
produce the same amount of output with less
input relative to other countries.
Comparative Advantage: A producer has a
comparative advantage over another in the
production of a good or services if it can
produce that product at a lower opportunity cost

39. Theory of Absolute
Advantage
Country Commodity
A B
Country 1 80 100
Country 2 120 90

40. Theory of Comparative
Advantage
Country Commodity
A B
Country 1 80 90
Country 2 120 100

41. `Laissez-Faire Economics
An economy in which individual people and
firms pursue their own self interests without
any central direction or regulation.

42. Thank You