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Chỉ số giá - Price 280
EXPLANATION OF TERMINOLOGY, CONTENT AND
METHODOLOGY OF SOME STATISTICAL INDICATORS ON
PRICE
Consumer price index (CPI)
is a relative indicator (measured by %)
reflecting the tendency and change in the price level by time series of market
basket of selected representative consumer goods and services. The basket of
goods and services for measuring CPI consists of popular goods and services
which represent for the population’s consumption are revised and updated every 5
years to be conformity with population’s consumption structure in each certain
period.
Weight for CPI compilation
is the expenditure share for item groups in
the total of the household expenditure which is collected from results of Vietnam
Household Living Standard Survey (VHLSS) and used constantly in a 5-year
period.
Weighted geometric mean Laspeyres formula is used to compile CPI:
0
i
W
n
1i
0
i
t
i
0 t
p
p
p
I
Where:
0 t
p
I
: CPI in the reference period (t) compared to the constant base
period (0);
t
i
p
,
0
i
p
: Consumer price of product i in the reference period (t) and in
the constant base period (0) respectively;
n
1i
0
i
0
i
0
i
V
V
W
: Weight in the constant base period (0);
0
i
V
: Consumer expenditure in the constant base period (0);
n: The number of items/ item groups.