introduction to economics
DESCRIPTION
Introduction to Economics. Barbulean. Instructional Method . Suggestions for the study of economics Read the book before coming to class Recopy lectures and reread the book within several hours of class Identify what you don’t understand Ask questions in class Use the online study guide - PowerPoint PPT PresentationTRANSCRIPT
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INTRODUCTION TO ECONOMICS
Barbulean
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INSTRUCTIONAL METHOD Suggestions for the study of economics
Read the book before coming to classRecopy lectures and reread the book within
several hours of class Identify what you don’t understand
Ask questions in class Use the online study guide Visit the professor during office hours
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DEFINITION OF ECONOMICS Mankiw’s definition
How Society manages its scarce resources Hedrick’s definition
How society chooses to allocate its scarce resources among competing demands to best satisfy human wants
Alternative definitionsEconomics is the study of choice.Economics is what economist do.Wikipedia's perspective
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SCARCITY AND THE FUNDAMENTAL QUESTIONS OF ECONOMICS Scarcity : Unlimited wants versus
limited resources Choices and tradeoffs Opportunity Costs All societies must answer these
questionsWhat is to be produced?How is to be produced?For whom will it be produced?
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ECONOMICS AS A SCIENCE
The Scientific Method Observation →Hypothesis →Testing Observation: identifying and measuring important variables – orderly loss of information Hypothesis: educated guesses about cause and effect with the variables
Theories Models: realism or usefulness
Testing: theories can’t be proven and are supported by repeated failed attempts to disprove them. Microeconomics vs. Macroeconomics The Assumption of Rational Behavior
Boxes Example People respond to incentives Limits to the use of rational behavior (e.g. axe murders)
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GREG MANKIW’S TEN PRINCIPLES OF
ECONOMIC THINKINGhttp://gregmankiw.blogspot.com/
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CATEGORIES OF BASIC PRINCIPLES OF ECONOMICS How people make decisions? How people interact? How does the economy work overall?
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HOW PEOPLE MAKE DECISIONS Principle #1 - People face tradeoffs
Time allocation – an example of tradeoffsProduction Possibilities FrontierEfficiency versus equity
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HOW PEOPLE MAKE DECISIONS Principle #2 - The cost of something is
what you have to give up to get itOpportunity costs come from Von Weiser, a
German economist late 1800sOpportunity costs are independent of
monetary unitsTINSTAAFLThe real costs of going to college
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HOW PEOPLE MAKE DECISIONS Principle #3 - Rational people think at
the marginRational or irrational decision-makingMarginal benefits and costs versus total
benefits and costsWeighing marginal costs and benefits leads
to maximizing net benefits (total welfare)
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HOW PEOPLE MAKE DECISIONS Principle #4 –People respond to
incentivesReactions to changes in marginal benefits
and costs Increases (decreases) in marginal benefits
mean more (less) of an activity Increases (decreases) in marginal costs mean
less (more) of an activityExample of seat belts leading to increased
speedsExample of SUV (with child car seat) in
Issaquah
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HOW PEOPLE INTERACT Principle #5 - Trade can make everybody
Society better offAdam Smith author of the “An Inquiry into the
Causes and Consequences of the Wealth of Nations” 1776
Gains from the division of labor and specialization
Mercantilists perspectivesExample of why Ellensburgians should trade
with others
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HOW PEOPLE INTERACT Principle #6 - Markets are usually a good
way of organizing economic activityFeudal times and haciendas in the new worldThe power of trade: cooperation versus conflictMarkets: prices and quantities traded, typical
and abstract
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HOW PEOPLE INTERACT Principle #6 - Markets are usually a
good way of organizing economic activity creativity and productivity and resource allocation“Failure” of centrally planned economies “set it and forget it” becomes “compete or
be obsolete”
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HOW PEOPLE INTERACT Principle #7 Governments can
sometimes improve market outcomesMarket signals can fail to allocate resources
efficiently or equitablyPublic goods, the exclusion principle, the
free-rider problem and non-rival consumption
External costs and benefitsExamples: vaccines, education, pollution
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HOW PEOPLE INTERACT Principle #7 Governments can
sometimes improve market outcomesEquitable or fair distribution of resources Efficiency and equity: the pie analogyGovernment Failure: is government
intervention always the proper solution?
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HOW THE ECONOMY WORKS AS A WHOLE
Principle # 8 – A country’s standard of living depends upon its ability to produce goods and services Adam Smith’s “An Inquiry into the Nature and
the Consequences of the Wealth of Nations”Materialism – more toys mean more welfarewealth: a necessary or sufficient condition for
happiness (are rich people happier, children with lots of toys)
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HOW THE ECONOMY WORKS AS A WHOLE Principle # 8 – A country’s standard of
living depends upon its ability to produce goods and services leisure time and productivity the factors of production: land or natural
resources, labor, capital, entrepreneurship technology and productivity the Rule of 72 and growth rates
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HOW THE ECONOMY WORKS AS A WHOLE Principle #9 – The general level of prices
rises when the government prints and distributes too much moneyDefinition of money, and economic
language
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HOW THE ECONOMY WORKS AS A WHOLE Principle #9 – The general level of prices
rises when the government prints and distributes too much moneyExamples: “Not worth a continental” and
ArgentinaEstablish of the Federal Reserve and the
introduction of sustained inflation in the US
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HOW THE ECONOMY WORKS AS A WHOLE Principle #10 – Society faces a short-run
tradeoff between inflation and unemploymentShort-run and the long-runDemand and supply shocksShort-run increases (decreases) in output
above (below) long-run potential output lead to adjustments
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THE CONCEPT OF OPPORTUNITY COST Opportunity cost of any choice
What we forego when we make that choice
Most accurate and complete concept of cost
Direct money cost of a choice may only be a part of opportunity cost of that choice
Opportunity cost of a choice includes both explicit costs and implicit costs
Explicit cost—dollars actually paid out for a choice
Implicit cost—value of something sacrificed when no direct payment is made
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OPPORTUNITY COST AND SOCIETY
All production carries an opportunity costTo produce more of one thing
Must shift resources away from producing something else
The Principle of Opportunity CostThe concept of opportunity cost sheds light
on virtually every problem that economists study, whether it be explaining the behavior of consumers or business firms or understanding important social problems like problems like poverty or racial discrimination
Basic Principle #2: Opportunity CostAll economic decisions made by individuals
or society are costlyThe correct way to measure the cost of a
choice is its opportunity cost—that which is given up to make the choice
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FIGURE 1: THE PRODUCTION POSSIBILITIES FRONTIER
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Number of Lives Saved per Period
Quantity of All Other Goods
per Period
100,000 200,000 300,000 400,000 500,000
1,000,000950,000850,000
700,000
500,000400,000
BA
C
D
E
F
W
At point A, all resources are used for "other goods."
Moving from point A to point B requires shifting resources out of other goods and into health care.
At point F. all resources are used for health care.
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INCREASING OPPORTUNITY COST According to law of increasing opportunity costThe more of something we produce
The greater the opportunity cost of producing even more of it
This principle applies to all of society’s production choices
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RECESSIONS A slowdown in overall economic activity
when resources are idle Widespread unemployment Factories shut down
Land and capital are not being used An end to the recession would move
the economy from a point inside its PPF to a point on its PPF
Using idle resources to produce more goods and services without sacrificing anything
Can help us understand an otherwise confusing episode in U.S. economic history
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RECESSIONS During early 1940s, standard of living in U.S.
did not decline as we might have expected but actually improved slightly. Why?
U.S. entered World War II and began using massive amounts of resources to produce military goods and services
Instead of pitting “health care” against “all other goods,” we look at society’s choice between military goods and civilian goods
U.S. was still suffering from the Great Depression when it entered WWII
Joining war effort helped end the Depression and moved economy from a point like A, inside the PPF, to a point like B, on the frontier
Military production increased, but so did the production of civilian goods
Although there were shortages of some consumer goods Overall result was a rise in the material well-being of the
average U.S. citizen War is only one factor that can reverse a downturn No rational nation would ever choose war as an economic policy
designed to cure a recession Alternative policies that virtually everyone would find
preferable 27
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FIGURE 2: PRODUCTION AND UNEMPLOYMENT
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A
B
Civilian Goods per Period
Military Goods per Period
2. then moved to the PPF during the war. Both military and civilian production increased.
1. Before WWII the United States operated inside its PPF . . .
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ECONOMIC GROWTH If economy is already operating on its PPF
Cannot exploit opportunity to have more of everything by moving to it
But what if the PPF itself were to change? Couldn’t we then produce more of everything? This happens when an economy’s productive capacity
grows Many factors contribute to economic growth, but
they can be divided into two categories Quantities of available resources—especially capital—can
increase An increase in physical capital enables economy to produce
more of everything that uses these tools More factories, office buildings, tractors, or high-tech medical
equipment Same is true for an increase in human capital
Skills of doctors, engineers, construction workers, software writers, etc.
Technological change enables us to produce more from a given quantity of resources
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ECONOMIC GROWTH Increases in capital and technological
change often go hand in hand For instance, PET body scanners will enable
us to save even more lives than our current set of resources Moving horizontal intercept of PPF rightward, from
F to F‘ Impact of PET scanners stretches PPF outward
along horizontal axis How can a technological change in
lifesaving enable us to produce more goods in other areas of the economy? Society can choose to use some of increased
lifesaving potential to shift other resources out of medical care and into production of other things Because of technological advance and new capital, we
can shift resources without sacrificing lives30
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ECONOMIC GROWTH If we can produce more of the things
that we value, without having to produce less of anything else, have we escaped from paying an opportunity cost?Yes . . . and noFigure 3 tells only part of story
Leaves out steps needed to create this shift in the PPF
For example, technological innovation doesn’t just “happen”—resources must be used to create it Mostly by research and development (R&D)
departments of large corporations In order to produce more goods and
services in the future, we must shift resources toward R&D and capital productionAway from production of things we’d
enjoy right now31
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FIGURE 3: THE EFFECT OF A NEW MEDICALTECHNOLOGY
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Number of Lives Saved per Period
Quantity of All Other Goods
per Period
300,000 500,000 600,000
1,000,000
700,000
A
J
D
H
F
1. A technological advance in saving lives increases this PPF's horizontal intercept . . .
4. or more lives saved and greater production of other goods.
3. The economy can end up with more lives saved and un-changed production of other goods . . .
2. But not its vertical intercept.
F'
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EFFICIENCY In production, we’d like to have
productive efficiency – achieving as much output as possible from a given amount of inputs or resources.
Efficiency involves achieving a goal as cheaply as possible.
Efficiency has meaning only in relation to a specified goal.
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EFFICIENCY Any point within (INSIDE) the production
possibility curve represents inefficiency. Inefficiency – getting less output from
inputs which, if devoted to some other activity, would produce more output.
Unattainable -Any point outside the production possibility curve represents something unattainable, given present resources and technology.
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EFFICIENCY AND INEFFICIENCY
Gun
s
10
8
6
4
2
0 2 4 6 8 10
Butter
C D
A
B
Efficientpoints
Inefficientpoint
Unattainable point, given available technology, resources and labor force
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TOM’S TRADE-OFFS: THE PRODUCTION POSSIBILITY FRONTIER
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SHIFTS IN THE PRODUCTION POSSIBILITY CURVE Society can produce more output if:
Technology is improved.More resources are discovered.Economic institutions get better at fulfilling
our wants.
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ECONOMIC GROWTHEconomic growth results in an outward shift of the PPF because production possibilities are expanded.
The economy can now produce more of everything.Production is initially at point A (20 fish and 25 coconuts), it can move to point E (25 fish and 30 coconuts).
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Neutral Technological Change
Butter
A
B Guns0
SHIFTS IN THE PRODUCTION POSSIBILITY CURVE
C
D
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Biased Technological Change
SHIFTS IN THE PRODUCTION POSSIBILITY CURVE
0
B
A
Butter
Guns
C
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SPECIALIZATION AND EXCHANGE
Specialization Method of production in which each person
concentrates on a limited number of activities Exchange
Practice of trading with others to obtain what we want
Allows for Greater production Higher living standards than otherwise possible
All economics exhibit high degrees of specialization and exchange
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FURTHER GAINS TO SPECIALIZATION Absolute Advantage: A Detour
Ability to produce a good or service using fewer resources than other producers use
Comparative Advantage If one can produce some good with a
smaller opportunity cost than others can Total production of every good or service
will be greatest when individuals specialize according to their comparative advantage
Another reason why specialization and exchange lead to higher living standards than self-sufficiency 42
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RESOURCE ALLOCATION Problem of resource allocation
Which goods and services should be produced with society’s resources?
Where on the PPF should economy operate? How should they be produced?
No capital at all Small amount of capital More capital
Who should get them? How do we distribute these products among
the different groups and individuals in our society?
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THE THREE METHODS OF RESOURCES ALLOCATION Traditional Economy
Resources are allocated according to long-lived practices from the past
Command Economy (Centrally-Planned)Resources are allocated according to
explicit instructions from a central authority Market Economy
Resources are allocated through individual decision making
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THE NATURE OF MARKETS A market is a group of buyers and sellers with the potential to trade with each otherGlobal markets
Buyers and sellers spread across the globe
Local marketsBuyers and sellers within a
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THE IMPORTANCE OF PRICES A price is the amount of money that
must be paid to a seller to obtain a good or service
When people pay for resources allocated by the marketThey must consider opportunity cost to
society of their individual actions Markets can create a sensible allocation
of resources
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RESOURCE ALLOCATION IN THE UNITED STATES Numerous cases of resource
allocation outside the marketSuch as families
Various levels of government collect about one-third of our incomes as taxesEnables government to allocate resources
by command Government uses regulations of
various types to impose constraints on our individual choice
The market is the dominant method of resource allocation in United StatesHowever, it is not a pure market
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RESOURCE OWNERSHIP Communism
Most resources are owned in common
SocialismMost resources are owned by state
CapitalismMost resources are owned privately
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TYPES OF ECONOMIC SYSTEMS An economic system is composed of two featuresMechanism for allocating resourcesMarketCommand
Mode of resource ownershipPrivateState
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FIGURE 4: TYPES OF ECONOMIC SYSTEMS
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Resource AllocationMarket Command
Private
State
Resource Ownership
Market Capitalism
Centrally Planned
Capitalism
Centrally Planned
Socialism
Market Socialism
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TRANSACTIONS: THE CIRCULAR-FLOW DIAGRAMTrade takes the form of barter when people directly exchange goods or services that they have for goods or services that they want.
The circular-flow diagram is a model that represents the transactions in an economy by flows around a circle.
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CIRCULAR-FLOW OF ECONOMIC ACTIVITIESA household is a person or a group of people that share their income.
A firm is an organization that produces goods and services for sale.
Firms sell goods and services that they produce to households in markets for goods and services.
Firms buy the resources they need to produce—factors of production—in factor markets.
Factor Market- A market used to exchange the services of a factor of production: labor, capital, land , and entrepreneurship.
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THE CIRCULAR-FLOW DIAGRAM
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FACTOR MARKET Factor markets, also termed resource
markets, exchange the services of factors, NOT the factors themselves. For example, the labor services of workers are exchanged through factor markets NOT the actual workers. Buying and selling the actual workers is not only slavery (which is illegal) it's also the type of exchange that would take place through product markets, not factor markets. More realistically, capital and land are two resources than can be and are legally exchanged through product markets. The services of these resources, however, are exchanged through factor markets. The value of the services exchanged through factor markets each year is measured as national income.
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THE CIRCULAR FLOW
Goods
Other countries
Financial markets
GovernmentFirms
(production)HouseholdTaxes
Factor services
SavingsImports
Government
Spending
Wages, rents, interest, profits
ExportsInvestment
Personal consumption
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GROWTH IN THE U.S. ECONOMY FROM 1962…
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…TO 1988