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![Page 1: Chapter 1: The Economic Way of Thinking The Economic Problem Production Possibilities Economic Analysis.](https://reader036.fdocuments.in/reader036/viewer/2022062407/56649d3e5503460f94a1783a/html5/thumbnails/1.jpg)
Chapter 1: The Economic Way of Chapter 1: The Economic Way of ThinkingThinking
• The Economic Problem
• Production Possibilities
• Economic Analysis
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Got stuff?Got stuff?
• Who made it?
• How was it made?
• How did you get it?
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I. The Economic ProblemI. The Economic Problem
• the basic economic problem is scarcity:
-- wants are unlimited, but resources
are limited
• so with scarcity, we must make choices,
• and with choices, come costs
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• Cost is the opportunity cost
-- what you give up when you make a choice
-- “there’s no such thing
as a free lunch”
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Cost of going to college
-- what you can buy with tuition & fees
-- what you could earn by working
-- what you could do with the free time
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• you are willing to give up
-- tuition
-- wages
-- leisure time
to go to college
-- b/c you expect higher income or more rewarding career
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economics is the study of choiceseconomics is the study of choices
• of how to allocate scarce resources
• choices made by
-- consumers
-- businesses
-- governments
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What are resources?What are resources?
• use resources to produce goods and services
• factors of production
-- land
-- labor
-- capital
-- entrepreneurship
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LandLand
• all natural resources
-- land-- minerals
-- water
-- wildlife
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LaborLabor
• size of labor force (quantity)
• skills of labor force (quality)
-- human capital
• the value of time
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CapitalCapital
• physical capital
-- goods used to make other goods
-- factories
-- machines
-- infrastructure
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• NOT financial capital
-- stocks, bonds, bank loans
• financial capital facilitates building of physical capital
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entrepreneurshipentrepreneurship
• human resource
• ideas
-- doing things better
-- e-commerce
-- new products
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Three Questions to answer:Three Questions to answer:
1. What to produce?
2. How to produce the stuff in #1?
3. For whom to produce?
(who gets the stuff in #1?)
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Example: A LexusExample: A Lexus
1. What to produce?• Toyota designs a luxury car with buyers in
mind
• Toyota decides how much to produce give the price and their costs
• Buyers decide how many to buy, based on price, their income, tastes, etc.
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• Toyota designs factory, uses machinery, & trains workers to minimize cost BUT retain a certain quality
• U.S. government restricts this decision:• Pollution laws
• safety laws
• labor laws
2. How to produce?2. How to produce?
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• Those who are willing and able to pay $50,000 for one.
(this is why I drive a Dodge)
• With markets, price rations a scarce resource
3. Who gets the Lexus?3. Who gets the Lexus?
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Who answers #1-3?Who answers #1-3?
• pure capitalism
• when buyers and sellers interact to
answer these questions
• markets unrestricted
• private property
• prices coordinate #1-3
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• the U.S. is a mixed market economy, since government plays a role
• enforces property rights
• regulates markets
• taxes to provide goods & services
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• command system
• the government answers questions 1-3
• former U.S.S.R., N. Korea
• reduced incentives for efficiency
• coordination failures
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SpecializationSpecialization
• How do we get the most out of our resources?
• We specialize in what we do best
and trade that for what we need
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• I teach.
• I get paid for it.
• I use the money to buy
• food
• oil changes
• clothes
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• If I• grew my own food
• made my own clothes
• fixed my own car
• I would not consume as much
• Specialization produces gains!• I can consume more
than what I could make
on my own
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Who specializes in what?Who specializes in what?
• Comparative advantage• if you produce a good at a lower
opportunity cost
then you should specialize in it
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Example: married coupleExample: married couple
• Husband: surgeon• $250,000 /year
• Wife: 5th grade teacher• $50,000 /year
• who should run the household?• Who has lower opportunity cost?
The wife.
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with specialization,with specialization,
• division of labor• different people specialize in different
things
• people become very good at their task
• efficiency gains
-- get more out of same resources
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specialization is everywherespecialization is everywhere
• doctors• neurosurgeon, obstetrics, pediatrics,…
• lawyers• divorce, real estate, patent law,
personal injury...
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The bottom line:The bottom line:
• Scarcity & opportunity cost are unavoidable.
BUT
• efficiency & specialization
make the most of scarce resources
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II. Production Possibilities FrontierII. Production Possibilities Frontier(PPF)(PPF)
• model of scarcity, choice, & opportunity cost
• choice between 2 goods
• PPF shows maximum possible
output combos of 2 goods,
given current resources
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PPF examplePPF example
• 2 goods:
-- CDs
-- bottled water
• use land, labor, capital to make
these goods
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Suppose Suppose these are these are 6 possible 6 possible pairs:pairs:
CDs (millions per
yr.)
Bottled Water (millions per
yr.)
A 15 0B 14 1C 12 2D 9 3E 5 4F 0 5
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We can graph the table & get the We can graph the table & get the PPF:PPF:
CDs
bottledwater
15
5
9
3
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Using the PPFUsing the PPF
• points on or inside the PPF arepossible
CDs
bottledwater
points INSIDE the PPFare inefficient
points ON the PPFare efficient
9
3
6
2
-- do not use all resources
-- use all resources
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Using the PPFUsing the PPF
• points outside the PPF are NOTpossible at this time
CDs
bottledwater
9
3
15
6
cannot produce 15 CDs AND 6 bottles of water
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scarcity & tradeoffsscarcity & tradeoffs
• the PPF shows limits to production
• so must choose between bottled water & CD combinations
-- give up water to get more CDs
-- give up CDs to get more water
-- TRADEOFF
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Opportunity CostOpportunity Cost
• on PPF there are tradeoffs
-- how much is given up?
= opportunity cost
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opportunity cost of 1 bottle of opportunity cost of 1 bottle of water:water:
• A to B
= 1 CD
• B to C
= 2 CDs
• C to D
= 3 CDs
CDs (millions per
yr.)
Bottled Water (millions per
yr.)
A 15 0B 14 1C 12 2D 9 3E 5 4F 0 5
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CDs (millions per
yr.)
Bottled Water (millions per
yr.)
Opp. cost of 1 bottle of water (in terms of CDs)
A 15 0B 14 1 1C 12 2 2D 9 3 3E 5 4 4F 0 5 5
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opportunity costs are increasingopportunity costs are increasing
• cost (in CDs) increases
as water production increases
• PPF is concave (bowed out)
• why?
-- harder to switch resources between CDs and water
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• At first when making more water
switch the best resources from
CD production
• But as we make more water
resources switched are less and less
suitable for water production
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Shifts in the PPFShifts in the PPF
• if we get more resources OR
• if technology improves
• then the PPF will shift out• produce more CDs and more water
• economic growth!
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CDs
bottledwater
9
3
15
6
With economic growth,
the unattainable becomesattainable
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II. Economic analysisII. Economic analysis
• models
• positive vs. normative
• fallacies
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MicroeconomicsMicroeconomics
• studies choices of consumers, firms, and how government affects these choices
• studies parts of the economy or a particular market
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MacroeconomicsMacroeconomics
• studies whole economy
• -- inflation
-- unemployment
-- recessions
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Building economic modelsBuilding economic models
• ask a question
• simplify reality
• make assumptions
• make prediction
• test the prediction
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• Models may be described with
-- words
-- math
-- pictures (graphs)
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exampleexample
Model consumer behavior in buying pizza
• how does a change in price of pizza impact the amount of pizza bought?
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• assume only price changes, and other factors remain constant
-- “ceteris paribus”
“other things being equal”
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• make a prediction:
• Words:
“when the price of pizza rises, people buy less pizza”
• Math:
quantity of pizza = 10 - .2(price of pizza)
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• graph
price
Quantity of pizza
demand
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Testing modelsTesting models
• Do model predictions match
the data?
• Do people buy less pizza when it’s price rises?• must distinguish cause and effect• in the real world other factors are
not held constant
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Positive statementsPositive statements
• statements about “what is”
• may be right or wrong
• testable
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Normative statementsNormative statements
• statements about “what ought to be”
• based on opinions and values
• not testable
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Example 1Example 1
“Employer-provided daycare reduces costs due to employee sick days and lost productivity”
• positive
-- statement of fact
(but it may be wrong)
-- testable
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Example 2Example 2
“Firms should provide on-site daycare for their employees.”
• normative
-- opinion
-- cannot test what firms “should” do,
only the result of what they do
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EconomistsEconomists
• discover, collect positive statements
about how economy works.• predict AVERAGE behavior
• use positive statements as support
for normative statements.
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Faulty economic analysisFaulty economic analysis
• correlation vs. causation
• post hoc, ergo propter hoc
• fallacy of composition
• ignoring secondary effects
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correlation vs. causationcorrelation vs. causation
• if “a” rises when “b” rises,
• positively correlated
• NOT necessarily true that “a” causes “b”• “b” could cause “a” OR• third factor causes both “a” and
“b”
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ExampleExample
• assault and ice cream sales are positively correlated
• Does ice cream make people want to hit someone?
• Do bullies go out for ice cream after a good fight?
• No, both increase due to warmer weather
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post hoc, ergo propter hocpost hoc, ergo propter hoc
• if A happened right before B, then A must have caused B.
• what about• coincidence?
• a third unrelated causal factor?
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exampleexample• nutrasweet and brain tumors
• increase in tumors in 1980s due to nutrasweet approval in 1981
• http://www.junkscience.com/news/nutrasweet.html
• But Duran Duran became a band in 1979….coincidence?
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fallacy of compositionfallacy of composition
• “what is true for one part is true for the whole”
• example: Paradox of thrift• should you save more $?
• what if everybody did?
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secondary effectssecondary effects
• policies have unintended consequences
• especially when they alter incentives
• example: rent control• intended to keep rents down• leads to shortage and run-down
apts.