FIN4801 - Financial Management by Prasanna Chandra (Textbook).pdf
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Chapter 4
MARKET AND DEMAND ANALYSIS
1. We have to estimate the parameters a and b in the linear relationship
Yt = a + bT
Using the least squares method.
According to the least squares method the parameters are:
∑TY–nTY
b=
∑T2–nT2
a = Y – bT
The parameters are calculated below:
Calculation in the Least Squares Method
T Y TY T2
1 2,000 2,000 1
2 2,200 4,400 4
3 2,100 6,300 9
4 2,300 9,200 16
5 2,500 12,500 25
6 3,200 19,200 36
7 3,600 25,200 49
8 4,000 32,000 64
9 3,900 35,100 81
10 4,000 40,000 100
11 4,200 46,200 121
12 4,300 51,600 144
13 4,900 63,700 169
14 5,300 74,200 196
∑ T = 105 ∑ Y = 48,500 ∑ TY = 421,600 ∑ T 2 = 1,015
T = 7.5 Y = 3,464
∑TY–nTY 421,600 – 14 x 7.5 x 3,464
b= =
∑T2–nT2 1,015 – 14 x 7.5 x 7.5
57,880
= = 254
227.5
a = Y – bT
= 3,464 – 254 (7.5)
= 1,559
, Thus linear regression is
Y = 1,559 + 254 T
2. In general, in exponential smoothing the forecast for t + 1 is
Ft + 1 = Ft + α et
Where Ft + 1 = forecast for year ) α = smoothing parameter
et = error in the forecast for year t = St = Ft
F1 is given to be 2100 and α is given to be 0.3
The forecasts for periods 2 to 14 are calculated below:
Period t Data (St) Forecast Error Forecast for t + 1
(Ft) (et St =Ft) (Ft + 1 = Ft + α et)
3. According to the moving average method
St + S t – 1 +…+ S t – n +1
Ft + 1 =
n
where Ft + 1 = forecast for the next period
St = sales for the current period
n = period over which averaging is done
Given n = 3, the forecasts for the period 4 to 14 are given below:
,Period t Data (St) Forecast Forecast for t + 1
(Ft) Ft + 1 = (St+ S t – 1 + S t – 2)/ 3
4.
Q1 = 60
Q2 = 70
I1 = 1000
I2 = 1200
Q1 – Q2 I1 + I2
Income Elasticity of Demand E1 = x
I2 - I1 Q2 – Q1
E1 = Income Elasticity of Demand
Q1 = Quantity demanded in the base year
Q2 = Quantity demanded in the following year
I1 = Income level in base year
I2 = Income level in the following year
70 – 60 1000 + 1200
E1 = x
1200 – 1000 70 + 60
22000
E1 = = 0.846
26000
, 5.
P1 = Rs.40
P2 = Rs.50
Q1 = 1,00,000
Q2 = 95,000
Q2 – Q1 P1 + P2
Price Elasticity of Demand = Ep = x
P2 –P1 Q2 + Q1
P1 , Q1 = Price per unit and quantity demanded in the base year
P2, Q2 = Price per unit and quantity demanded in the following year
Ep = Price Elasticity of Demand
95000 - 100000 40 + 50
Ep = x
50 - 40 95000 + 100000
- 45
Ep = = - 0.0231
1950
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