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Quiz 3
Elasticity
23
Economics
Undergraduate 4
02/14/2013

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Term
Define Elasticity
Definition
Responsiveness of one variable to CHANGES in another variable
Term
List the four elasticity estimates. Explain each
Definition

DEMAND - responsiveness of Qd to changes in PRICE 

SUPPLY - responsiveness of Qs to changes in PRICE 

CROSS - responsiveness of Qx to changes  in PRICE of Y 

INCOME - responsiveness of Qx to changes in INCOME

Term
 Graphically illustrate and explain the relationships among price, quantity, and total revenue.
Definition

Elastic = High price/low quanity
Unitary = even price/quanity = best TR

Inelastic = Low price/high quanity 

Term
What are the reasons for relatively elastic  demand?
Definition

Relative elastic 

REASONS:
Close  substituions

Luxuary

Large Portion of Budget

Long Time Period

Term
What are the reasons for relatively INELASTIC demand?
Definition

INELASTIC

Reasons:

Necessity

Short Time Period
No subsititutes

Small portion of budget 

Term
What does an ELASTIC demand line look like?
Definition
[image]
Term
What does an INELASTIC demand line look like?
Definition
[image]
Term
Whats the formula for a DEMAND elasticity?
Definition

 

Ed = ((q1-q2)/(q1+q2))/((p1-p2)/(p1+p2)) 

Term
What is the formula for SUPPLY demand?
Definition
Es = % change in Qx / % change in Px
Term
If Es > 1, which axis will it pass through?
Definition
Price
Term
If Es = 1, which axis will it pass through?
Definition
Orgin (regardless of slope)
Term
If Ex < 1, what axis will it pass through?
Definition
Quanity
Term
What is the formula for Cross Elasticity?
Definition
Exy = % change in Qx to change in Py
Term

If Exy is 25, what is it?

Definition
Good substitute
Term
If Exy is - 3, what is it?
Definition
Poor compliment
Term
If Ed > 1, what does that mean?
Definition
decrease in price will increase total revenue (vice versa)
Term
If  Ed < 1, what does it mean?
Definition
decrease in price will decrease total revenue (vice versa)
Term
If Ed = 1, what does it mean?
Definition
unitary, total revenue at a maximum
Term
What does Exy = -25 mean?
Definition
That it is a cross demand line that has a GOOD compliment.
Term
What does Ed = 4.3 mean?
Definition

The line is ELASTIC

4.3% Quanity Demanded/1% price change.
1% price change UP, there will be a 4.3% DOWN.

1% price change DOWN, there will be a 4.3% UP. 

Term
What does Es=.50 mean?
Definition

INELASTIC supply line

POOR subsititute

.5 INCREASE in Quanity Supplied/1% Price INCREASE

.5 DECREASE in Quanity Supplied/ 1% Price DECREASE

Term
What does EY = .03 mean?
Definition

There is a .03  INCREASE in 1% Income rise (vice/versa)

 

Term
What does Exy = 10 mean?
Definition

cross demand line

good substitute

change 10% quanityx in response to change 1% pricey 

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