This document discusses various types of index numbers used to measure changes in economic variables over time. It defines an index number as a quantitative measure of the growth of prices, production, or other quantities of economic interest from one period to another. The document then describes different characteristics, uses, problems, classifications, and methods for constructing index numbers, including simple aggregative methods, weighted aggregative methods like Laspeyres and Paasche, and chain index numbers. It provides examples to illustrate how to calculate different index numbers.
It is essential for all regression models that the relationship between the independent and dependent variables are represented correctly. Functional form tries to do exactly this. A functional form will give an equation for the dependent and independent variables so that the hypothesis tests can be carried out properly. Copy the link given below and paste it in new browser window to get more information on Functional Forms of Regression Analysis:- http://www.transtutors.com/homework-help/economics/functional-forms-of-regression-models.aspx
It is essential for all regression models that the relationship between the independent and dependent variables are represented correctly. Functional form tries to do exactly this. A functional form will give an equation for the dependent and independent variables so that the hypothesis tests can be carried out properly. Copy the link given below and paste it in new browser window to get more information on Functional Forms of Regression Analysis:- http://www.transtutors.com/homework-help/economics/functional-forms-of-regression-models.aspx
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Definition- Problems for construction. Construction of price, quantity, value and cost of living index numbers, ideal index, tests and uses of index numbers.
This theory relies on the market behaviour of the consumer to know about his preferences with regard to the various combinations for the two reactions and responses of the consumer.
HOW IS IT USEFUL IN FIELD OF FORENSIC SCIENCE AND IN THIS I HAVE SHOWN THE TYPES OF CORRELATION, SIGNIFICANCE , METHODS AND KARL PEARSON'S METHOD OF CORRELATION
Definition- Problems for construction. Construction of price, quantity, value and cost of living index numbers, ideal index, tests and uses of index numbers.
This theory relies on the market behaviour of the consumer to know about his preferences with regard to the various combinations for the two reactions and responses of the consumer.
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3. INTRODUCTION
• An index number measures the relative
change in price, quantity, value, or some other
item of interest from one time period to
another.
• A simple index number measures the relative
change in one or more than one variable.
5. DEFINITION
• “Index numbers are quantitative measures of
growth of prices, production, inventory and other
quantities of economic interest.”
»
-Ronold
6. CHARACTERISTICS OF INDEX NUMBERS
Index numbers are specialised averages.
Index numbers measure the change in the
level of a phenomenon.
Index numbers measure the effect of changes
over a period of time.
7. USES OF INDEX NUMBERS
o To framing suitable policies.
o They reveal trends and tendencies.
o Index numbers are very useful in deflating.
8. PROBLEMS RELATED TO INDEX NUMBERS
• Choice of the base period.
• Choice of an average.
• Choice of index.
• Selection of commodities.
• Data collection.
11. SIMPLE AGGREGATIVE METHOD
It consists in expressing the aggregate price of all
commodities in the current year as a percentage
of the aggregate price in the base year.
P01= Index number of the current year.
= Total of the current year’s price of all
commodities.
= Total of the base year’s price of all
commodities.
100
0
1
01 ×=
∑
∑
p
p
P
1p
0p
12. EXAMPLE:-
From the data given below construct the index number for
the year 2007 on the base year 2008 in rajasthan state.
COMMODITIES UNITS
PRICE (Rs)
2007
PRICE (Rs)
2008
Sugar Quintal 2200 3200
Milk Quintal 18 20
Oil Litre 68 71
Wheat Quintal 900 1000
Clothing Meter 50 60
13. Solution:-
COMMODITIES UNITS
PRICE (Rs)
2007
PRICE (Rs)
2008
Sugar Quintal 2200 3200
Milk Quintal 18 20
Oil Litre 68 71
Wheat Quintal 900 1000
Clothing Meter 50 60
32360 =∑p 43511 =∑ p
Index Number for 2008-
45.134100
3236
4351
100
0
1
01 =×=×=
∑
∑
p
p
P
It means the prize in 2008 were 34.45% higher than the previous year.
14. SIMPLE AVERAGE OF RELATIVES METHOD.
• The current year price is expressed as a
price relative of the base year price. These
price relatives are then averaged to get the
index number. The average used could be
arithmetic mean, geometric mean or even
median.
N
p
p
P
∑
×
=
100
0
1
01
Where N is Numbers Of items.
When geometric mean is used-
N
p
p
P
∑
×
=
100log
log 0
1
01
15. Example-
From the data given below construct the
index number for the year 2008 taking
2007 as by using arithmetic mean.
Commodities Price (2007) Price (2008)
P 6 10
Q 2 2
R 4 6
S 10 12
T 8 12
16. Solution-
Index number using arithmetic mean-
Commodities Price (2007) Price (2008) Price Relative
P 6 10 166.7
Q 12 2 16.67
R 4 6 150.0
S 10 12 120.0
T 8 12 150.0
100
0
1
×
p
p
∑
×100
0
1
p
p
=603.37
63.120
5
37.603
100
0
1
01 ==
×
=
∑
N
p
p
P
1p0p
17. Weighted index numbers
These are those index numbers in which rational
weights are assigned to various chains in an explicit
fashion.
(A)Weighted aggregative index numbers-
These index numbers are the simple aggregative type
with the fundamental difference that weights are
assigned to the various items included in the index.
Dorbish and bowley’s method.
Fisher’s ideal method.
Marshall-Edgeworth method.
Laspeyres method.
Paasche method.
Kelly’s method.
18. Laspeyres Method-
This method was devised by Laspeyres in
1871. In this method the weights are
determined by quantities in the base.
100
00
01
01 ×=
∑
∑
qp
qp
p
Paasche’s Method.
This method was devised by a German statistician Paasche
in 1874. The weights of current year are used as base year
in constructing the Paasche’s Index number.
100
10
11
01 ×=
∑
∑
qp
qp
p
19. Dorbish & Bowleys Method.
This method is a combination of Laspeyre’s and
Paasche’s methods. If we find out the arithmetic
average of Laspeyre’s and Paasche’s index we get
the index suggested by Dorbish & Bowley.
100
2
10
11
00
01
01 ×
+
=
∑
∑
∑
∑
qp
qp
qp
qp
p
21. Marshall-Edgeworth Method.
In this index the numerator consists of an
aggregate of the current years price
multiplied by the weights of both the base
year as well as the current year.
100
1000
1101
01 ×
+
+
=
∑ ∑
∑∑
qpqp
qpqp
p
23. Example-
Given below are the price quantity data,with
price quoted in Rs. per kg and production
in qtls.
Find- (1) Laspeyers Index (2) Paasche’s
Index (3)Fisher Ideal Index.2002
ITEMS PRICE PRODUCTION PRICE PRODUCTION
BEEF 15 500 20 600
MUTTON 18 590 23 640
CHICKEN 22 450 24 500
2007
26. Weighted average of price relative
In weighted Average of relative, the price
relatives for the current year are calculated
on the basis of the base year price. These
price relatives are multiplied by the
respective weight of items. These products
are added up and divided by the sum of
weights.
Weighted arithmetic mean of price
relative-
∑
∑=
V
PV
P01
100
0
1
×=
P
P
PWhere-
P=Price relative
V=Value weights= 00qp
27. Value index numbers
Value is the product of price and quantity. A
simple ratio is equal to the value of the
current year divided by the value of base
year. If the ratio is multiplied by 100 we
get the value index number.
100
00
11
×=
∑
∑
qp
qp
V
28. Chain index numbers
When this method is used the comparisons
are not made with a fixed base, rather the
base changes from year to year. For
example, for 2007,2006 will be the base; for
2006, 2005 will be the same and so on.
Chain index for current year-
100
yearpreviousofindexChainyearcurrentofrelativelinkAverage ×
=
29. Example-
• From the data given below construct an
index number by chain base method.
Price of a commodity from 2006 to 2008.
YEAR PRICE
2006 50
2007 60
2008 65