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Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going to Disneyland Economists look at the EXPLICIT COSTS and the IMPLICIT COSTS. Implicit costs are the opportunity costs such as forgone time and forgone income. 1

Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

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The Production Possibilities Curve (PPC) Using Economic Models… Step 1: Explain concept in words Step 2: Use numbers as examples Step 3: Generate graphs from numbers Step 4: Make generalizations using graph 3

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Page 1: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Accountants vs. EconomistsAccountants look at only EXPLICIT COSTS.•Explicit costs are the traditional “out-of pocket costs” of decision making.• Ex: Going to Disneyland

Economists look at the EXPLICIT COSTS and the IMPLICIT COSTS.•Implicit costs are the opportunity costs such as forgone time and forgone income.• Ex: Payton Manning leaves the NFL to open a

taco shop. 1

Page 2: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Society has unlimited wants but unlimited resources

The Economizing Problem…Scarcity

WE HAVE A PROBLEM!!

2

Page 3: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

The Production Possibilities Curve

(PPC)Using Economic Models…

Step 1: Explain concept in wordsStep 2: Use numbers as examplesStep 3: Generate graphs from numbersStep 4: Make generalizations using graph

3

Page 4: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

What is the Production Possibilities Curve?• A production possibilities curve (PPC) is a model

that shows alternative ways that an economy can use its scarce resources

• This model graphically demonstrates scarcity, trade-offs, opportunity costs, and efficiency.

4 Key Assumptions• Only two goods can be produced • Full employment of resources• Fixed Resources (Ceteris Paribus)• Fixed Technology

4

Page 5: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

a b c d e f14 12 9 5 0 00 2 4 6 8 10

BikesComputers

NOW GRAPH IT: Put bikes on y-axis and computers on x-axis

Production “Possibilities” Table

Each point represents a specific combination of goods that can be

produced given full employment of resources.

5

Page 6: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Bik

es

Computers

14

12

10

8

6

4

2

00 2 4 6 8 10

A

B

C

D

E

G

Inefficient/ Unemployment

Impossible/Unattainable (given current resources)

Efficient

Production PossibilitiesHow does the PPG graphically demonstrates scarcity, trade-

offs, opportunity costs, and efficiency?

6

Page 7: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

2 Bikes2.The opportunity cost of moving from b to d is…

4.The opportunity cost of moving from f to c is…

3.The opportunity cost of moving from d to b is…

7 Bikes

4 Computer

0 Computers

5.What can you say about point G?Unattainable

1. The opportunity cost of moving from a to b is…

Example:

Opportunity Cost

7

Page 8: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

The Production Possibilities Curve (or Frontier)

8

Page 9: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

PIZZA 0 1 2 3 4CALZONES 4 3 2 1 0

• List the Opportunity Cost of moving from a-b, b-c, c-d, and d-e.

• Constant Opportunity Cost- Resources are easily adaptable for producing either good.

• Result is a straight line PPC (not common)

Production PossibilitiesA B C D E

9

Page 10: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

PIZZA 20 19 16 10 0ROBOTS 0 1 2 3 4

• List the Opportunity Cost of moving from a-b, b-c, c-d, and d-e.

• Law of Increasing Opportunity Cost-• As you produce more of any good, the

opportunity cost (forgone production of another good) will increase.

• Why? Resources are NOT easily adaptable to producing both goods.

• Result is a bowed out (Concave) PPC

A B C D EProduction Possibilities

Page 11: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Constant vs. Increasing Opportunity Cost

Corn

Wheat

Cactus

Pineapples

Identify which product would have a straight line PPC and which would be bowed out?

Page 12: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

1 Bike2.The PER UNIT opportunity cost of moving from b to c is…

4.The PER UNIT opportunity cost of moving from d to e is…

3.The PER UNIT opportunity cost of moving from c to d is…

1.5 (3/2) Bikes

2 Bikes

2.5 (5/2) Bikes

= Opportunity CostUnits Gained

1. The PER UNIT opportunity cost of moving from a to b is…

Example:

PER UNIT Opportunity CostHow much each marginal unit costs

NOTICE: Increasing Opportunity Costs 12

Page 13: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

The Production Possibilities Curve and Efficiency

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Page 14: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Productive Efficiency- • Products are being produced in the least

costly way. • This is any point ON the Production

Possibilities CurveAllocative Efficiency-

• The products being produced are the ones most desired by society.

• This optimal point on the PPC depends on the desires of society.

Two Types of Efficiency

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Page 15: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Productive and Allocative EfficiencyB

ikes

Computers

14

12

10

8

6

4

2

00 2 4 6 8 10

A

B

C

D

F

E

Which points are productively efficient?Which are allocatively efficient?

G

15

Productively Efficient combinations are A through D

Allocative Efficient combinations depend on

the wants of society (What if this represents a

country with no electricity?)

Page 16: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Why two types of efficiency?

Size 20 running shoes

Size 10 running shoes

A

Is combination “A” efficient?Yes and No. It is productively efficient but it is not the

combination society wants

Page 17: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Shifting the Production Possibilities Curve

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Page 18: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

4 Key Assumptions Revisited• Only two goods can be produced • Full employment of resources• Fixed Resources (4 Factors)• Fixed Technology

What if there is a change?3 Shifters of the PPC

1. Change in resource quantity or quality

2. Change in Technology3. Change in Trade 18

Production Possibilities

Page 19: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Rob

ots

Pizzas

What happens if there is an increase

in population?

19

Production Possibilities

Page 20: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Rob

ots

Pizzas

What happens if there is an increase

in population?

20

Production Possibilities

Page 21: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Rob

ots

Pizzas

What if there is a technology improvement

in pizza ovens

21

Production Possibilities

Page 22: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Rob

ots

Pizzas

What if there is a technology improvement

in pizza ovens

22

Production Possibilities

Page 23: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Panama – Favors Consumer Goods

Mexico – Favors Capital Goods

Consumer goods

Capi

tal G

oods

Current PPC

Future PPC

Consumer goods

Capi

tal G

oods

Future PPC

Current PPC

Capital Goods and Future Growth

MexicoPanama23

Countries that produce more capital goods will have more growth in the future.

Page 24: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

PPC PracticeDraw a PPC showing changes for each of the

following:Pizza and Robots (3)

1. New robot making technology2. Decrease in the demand for pizza

3. Mad cow disease kills 85% of cows

Consumer goods and Capital Goods (4) 4. BP Oil Spill in the Gulf 5. Faster computer hardware 6. Many workers unemployed 7. Significant increases in education

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Page 25: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

New robot making technologyQ

Q

Rob

ots

Pizzas

Question #1

25

A shift only for Robots

Page 26: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Decrease in the demand for pizzaQ

Q

Rob

ots

Pizzas

Question #2

26

The curve doesn’t shift!A change in demand

doesn’t shift the curve

Page 27: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Mad cow disease kills 85% of cowsQ

Q

Rob

ots

Pizzas

Question #3

27

A shift inward only for Pizza

Page 28: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

BP Oil Spill in the GulfQ

QCap

ital G

oods

(Gun

s)

Consumer Goods (Butter)

Question #4

28

Decrease in resources decrease production possibilities for both

Page 29: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Faster computer hardwareQ

QCap

ital G

oods

(Gun

s)

Consumer Goods (Butter)

Question #5

29

Quality of a resource improves shifting the

curve outward

Page 30: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Many workers unemployedQ

QCap

ital G

oods

(Gun

s)

Consumer Goods (Butter)

Question #6

30

The curve doesn’t shift!Unemployment is just a point inside the curve

Page 31: Accountants vs. Economists Accountants look at only EXPLICIT COSTS. Explicit costs are the traditional “out-of pocket costs” of decision making. Ex: Going

Significant increases in educationQ

QCap

ital G

oods

(Gun

s)

Consumer Goods (Butter)

Question #7

31

The quality of labor is improved. Curve shifts

outward.