This document discusses economic concepts related to demand and elasticity. It provides calculations of price elasticity of demand for various pairs of goods using the midpoint formula. Specifically, it calculates: 1) The price elasticity of demand between goods A and B, between B and C, between D and E, and between A and D. 2) It also finds the price elasticity of demand between goods B and D. 3) For each pair of goods, it calculates the elasticity using the midpoint formula and provides the specific values.

1. Economic (microeconomic)
Lectured Eng Leng
Room D-302
Group 3: ,
,
, ឯក
,
ក
៖
៖
- A B, B A ក
- B C, C B ក
- D E, E D ក
- A D, D A ក
- B D, D B ក
៖
+ A B, B A ក
- EdA->B =
A
A
AB
AB
Q
P
x
PP
QQ








=| |X = 1.33
- EdB->A =
B
B
BA
BA
Q
P
x
PP
QQ








= | |X = 1.26
- EdA->B =
AB
AB
AB
AB
QQ
PP
x
PP
QQ










= | |X = 1.29
+ B C, C B ក
Px Qx
A 10 1500
B 12 1900
C 15 2400
D 20 3600
E 22 4200

2. - EdB->C =
B
B
BC
BC
Q
P
x
PP
QQ








=| |X = 1.05
- EdC->B =
C
C
CB
CB
Q
P
x
PP
QQ








=| |X = 1.0416
- EdB->C =
BC
BC
BC
BC
QQ
PP
x
PP
QQ










= | |X = 1.0465
+ D E, E D ក
- EdD->E =
D
D
DE
DE
Q
P
x
PP
QQ








=| |X = 1.66
- EdE->D =
E
E
ED
ED
Q
P
x
PP
QQ








=| |X = 1.57
- EdD->E =
DE
DE
DE
DE
QQ
PP
x
PP
QQ










= | |X = 1.61
+ A D, D A ក
- EdA->D =
A
A
AD
AD
Q
P
x
PP
QQ








=| |X = 1.4
- EdD->A =
D
D
DA
DA
Q
P
x
PP
QQ








=| |X = 1.16
- EdA->D =
AD
AD
AD
AD
QQ
PP
x
PP
QQ










=| |X = 1.23
+ B D, D B ក
- EdB->D =
B
B
BD
BD
Q
P
x
PP
QQ








=| |X = 1.34
- EdD->B =
D
D
DB
DB
Q
P
x
PP
QQ








=| |X = 1.18
- EdB->D =
BD
BD
BD
BD
QQ
PP
x
PP
QQ










= | |X = 1.23
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