The total period index is referred to as the period index for short.
For example, the output of a certain product, commodity sales, total wages, gross national product and so on. Are symbols of that period.
The periodicity index reflects the periodicity phenomenon.
trait
1, the index values in different periods are added, and the added values represent the overall development level of the phenomenon in a longer period. For example, add up the steel output in one year 12 months to get the steel output in the whole year.
2. The value of the period indicator is directly related to the length of the included period. Generally speaking, the longer the period, the greater the value of the index, and the shorter the period, the smaller the value of the index.
3. The cycle index value is the result of continuous registration and accumulation. For example, the monthly output is obtained by registering the daily output and then accumulating, and the annual output is obtained by accumulating the output of 12 months. What is a cycle indicator?
Cycle index, also called "number of periods", is an index reflecting the overall level of development and change of social and economic phenomena in a period of time. For example, China's GDP reached 9553.3 billion yuan in 200 1 year, which refers to the sum of the added value created by various industries of China's national economy every day during 200 1 year. For example, the output of products and the sales of social retail goods are all indicators of a period.
Characteristics of periodic indicators
1, with additivity. The total index of another longer period can be obtained by adding the indexes of temporally adjacent periods.
2. The index value is directly related to the length of the period. Generally speaking, the longer the period, the greater the index value.
3. It must be obtained through continuous registration. The value of the cycle index depends on the development of each moment in the whole cycle, and only the cycle index obtained by continuous registration will be accurate.
Difference between periodic index and time index
1, the index value of the periodic index is continuous, and the index value of the time index is discontinuous.
2. Indicator values of period indicators can be accumulated, but those of time indicators cannot be accumulated.
3. The index value of the period index is directly related to the length of the included period, while the index value of the time point index is not directly related to the length of the time interval.