CONSUMER BEHAVIOR. UTILITY The satisfaction that consumption of a good or service provides.
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Transcript of CONSUMER BEHAVIOR. UTILITY The satisfaction that consumption of a good or service provides.
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CONSUMER BEHAVIOR
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UTILITY
• The satisfaction that consumption of a good or service provides
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DIMINISHING MARGINAL UTILITY
As you consume additional units of a good, at some point each additional unit will begin providing less utility than the one before it.
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UTILITY
• Total utility• Total satisfaction from a specific quantity
• Marginal utility• Extra satisfaction from an additional unit
• Law of diminishing marginal utility• Explains downward sloping demand
• Why are newspaper vending machines different than pop machines?
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GRAPHING UTILITY
0
10
20
30
1086420
-2
1 2 3 4 5 6 7
1 2 3 4 5 6 7
Tota
l Uti
lity
(Uti
ls)
Mar
gin
al U
tilit
y (U
tils
)
(1)Tacos
ConsumedPer Meal
(2)Total
Utility,Utils
(3)Marginal
Utility,Utils
0
1
2
3
4
5
6
7
0
10
18
24
28
30
30
28
]]]]]]]
10
8
6
4
2
0
-2
TU
MU
Total Utility
Marginal Utility
Units Consumed Per Meal
Units Consumed Per Meal
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Let’s go to…
How many tacos will you eat?What KEY piece of information are we missing?
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THEORY OF CONSUMER BEHAVIOR
•Key dimensions of the consumer problem• Rational behavior• Preferences • Budget constraint• Prices
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THEORY OF CONSUMER BEHAVIOR
•Find utility maximizing combination of goods
•Utility maximizing rule• Allocate income• Last dollar spent on each good yields same marginal utility
• Marginal utility per dollar• What provides more utility to you, a Baconator or a JBC?
• Why might you still buy the JBC over the Baconator? 7-7
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Numerical ExampleCombinations of apples and oranges obtainable with an income of $10
1. Compare marginal utilities2. Then compare
per dollar - MU/Price3. Choose the highest4. Check budget -
proceed to next item
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LET’S SPEND THE $10!
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WHAT ABOUT AN $8 BUDGET??
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$9???
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ALGEBRAIC GENERALIZATION
MU of product A
price of A
MU of product B
price of B=
8 Utils
$1
16 Utils
$2=
Optimum Achieved – Money income is allocated so that the last dollar spent on
each product yields the same extra or marginal utility
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PRACTICE