Microeconomics
Microeconomics
2nd Edition
ISBN: 9781259813337
Author: KARLAN, Dean S., Morduch, Jonathan
Publisher: Mcgraw-hill Education,
Question
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Chapter C, Problem 1PA
To determine

(a)

To calculate:

The percentage change from 8 to 12 using the mid-point method.

Expert Solution
Check Mark

Answer to Problem 1PA

The percentage change from 8 to 12 is 80%.

Explanation of Solution

The midpoint formula computes percentage changes by dividing the change by the average value.

Percentage change is calculated as follows:

    Percentage change=Q2Q1Average of Q×100Percentage change=Q2Q1( Q 2 + Q 1 2)×100Percentage change=128( 12+82)×100Percentage change=4 202×100Percentage change=45×100Percentage change=80%

To determine

(b)

To calculate:

The percentage change in 18 to 14 using the mid-point method.

Expert Solution
Check Mark

Answer to Problem 1PA

Quantity is decreased by '25%'.

Explanation of Solution

Percentage change can be calculated as follows:

  Percentage change=Q2Q1Average of Q×100Percentage change=Q2Q1( Q 2 + Q 1 2)×100Percentage change=1418( 14+182)×100Percentage change=4 322×100Percentage change=416×100Percentage change=25%

To determine

(c)

To calculate:

The percentage change in 130 to 120 using the mid-point method.

Expert Solution
Check Mark

Answer to Problem 1PA

Quantity is decreased by '8%'.

Explanation of Solution

Percentage change can be calculated as follows:

  Percentage change=Q2Q1Average of Q×100Percentage change=Q2Q1( Q 2 + Q 1 2)×100Percentage change=120130( 120+1302)×100Percentage change=10 2502×100Percentage change=10125×100Percentage change=8%

To determine

(d)

To calculate:

The percentage change in 95 to 105 using the mid-point method.

Expert Solution
Check Mark

Answer to Problem 1PA

Quantity is increased by 10%.

Explanation of Solution

Percentage change can be calculated as follows:

  Percentage change=Q2-Q1Average of Q×100Percentage change=Q2Q1( Q 2 + Q 1 2)×100Percentage change=10595( 105+952)×100Percentage change=10 2002×100Percentage change=10100×100Percentage change=10%

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11:44 Fri Apr 4 Would+You+Take+the+Bird+in+the+Hand Would You Take the Bird in the Hand, or a 75% Chance at the Two in the Bush? BY VIRGINIA POSTREL WOULD you rather have $1,000 for sure or a 90 percent chance of $5,000? A guaranteed $1,000 or a 75 percent chance of $4,000? In economic theory, questions like these have no right or wrong answers. Even if a gamble is mathematically more valuable a 75 percent chance of $4,000 has an expected value of $3,000, for instance someone may still prefer a sure thing. People have different tastes for risk, just as they have different tastes for ice cream or paint colors. The same is true for waiting: Would you rather have $400 now or $100 every year for 10 years? How about $3,400 this month or $3,800 next month? Different people will answer differently. Economists generally accept those differences without further explanation, while decision researchers tend to focus on average behavior. In decision research, individual differences "are regarded…
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