Economics Price Elasticity of Demand
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PROBLEM SET ONE 3 - PRICE-ELASTICITY OF DEMAND
P1 P2 QD1 QD2 I II III IV V
1 1 2 10 5
2 3 2 9 9
3 0.40 1.40 30 15
4 1.2 4.0 20 15
5 7.5 4.6 40 30
6 6 12 12 6
7 18 36 360 180
8 5 5.000...01 1x106 0
9 5 4.9999.... 10 1x109
10 5 3 40 90
11 12 20 200 200
12 7 15 24 16
13 7 16 78 78
14 8 4 30 54
15 140 275 625 495
16 25 65 150 100
17 65 91 1300 780
18 4 5 21 11
19 78 91 780 780
20 91 78 780 780
Column I - determine the Price-Elasticity of Demand Coefficient. Refer to the Price-Elasticity Coefficient and Formula :
change in quantity demanded change in price
EP = ---------------------------------------- ∕ ----------------------------
sum of quantities demanded / 2 sum of prices / 2
The data in the first four columns represent price (P) and quantity demanded (Qd) in time 1 (before change in price) and time 2 (after change in price) for a specified good. Note that results should be expressed in absolute terms. For example, -1 should be expressed as │1│, as should a positive 1.
Column II - Interpret the results and indicate the type of elasticity which applies (such as Elastic, Inelastic, Perfectly Elastic, Perfectly Inelastic, Unitary) based on how the quantity demanded changed subsequent to a change in price.
Column III - Determine if the good in question would be considered a necessity, a luxury or neither.
Column IV - Indicate, in monetary terms, how much is the change in total revenue or total expenditure (TR = P X QD), from the first price level to the second.
Column V - indicate the direction of the change, that is, increasing or decreasing (show a + sign for increasing and a - sign for decreasing).
Note: for any monetary result please include the applicable currency symbol ($, €, etc.).
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Solution Summary
The solution discusses the economics of price elasticity of demand.
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NOTES:
1. The cells in RED were converted. Just click on any of these cells to view how they were converted in the formula bar. The conversion was made for easier computation
2. YELLOW cells contain formulas
3. I couldn't put the currency symbol since there is no data available
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