|
|
|
|
|
| COM108E - Turnover value indices in wholesale and retail, maintenance and repair of motor vehicles and motorcycles, working day and seasonally adjusted series - base year 2005 |
| Definition |
The net turnover is calculated by summing up the invoiced returns from the sale of goods and commodities, the performance of works and services. Turnover does not include VAT, excise duties, subsidies received from public authorities or EU institutions and income from sale or transfer of fixed assets. The Nomenclature of economic operator?s monthly providing data includes economic operators having industry as main activity divisions 47 (CANE Rev. 2.) |
| Periodicity |
Monthly |
| Data sources |
Statistical survey on turnover in trade and services details |
| Methodology |
In order to adjust the series, the DEMETRA programs package was used (TRAMO/SEATS method) estimating the effect of working days number different from one month to another and calendar effect (orthodox Easter, bisect year, and other national holidays) as well as the identification and correction of outliers (occasional, transitory or permanent level changes) and interpolation of missing values.
The adjusted series of working days effect and seasonality is obtained by eliminating seasonal component from adjusted series of working days effect.
Regression models used for each series are set up at the begining of each year involving the recalculation of adjusted series calculated in the previous year (recalculation due to the adopted models change, number of regresors used and number of available observations).
Aggregate levels were adjusted by direct method supposing direct adjustment of aggregated series. Using the direct method could lead to some inconsistencies in data series (respectively, aggregates should not be always ranging between the values of origin components).
Unobserved components: trend-cycle,seasonality and irregular components are estimated by means of the SEATS program based on ARIMA models.
The adjusted series of working days effect and seasonality is obtained by eliminating seasonal component from adjusted series of working days effect.
In order to adjust the series, the DEMETRA programs package was used (TRAMO/SEATS method) estimating the effect of working days number different from one month to another and calendar effect (orthodox Easter, bisect year, and other national holidays) as well as the identification and correction of outliers (occasional, transitory or permanent level changes) and interpolation of missing values.
|
| Last update |
FEB 14, 2013 |
| Observations |
Statistical survey carried out according with Eurostat recommendations starting with 2000. Adjusted series according to the working days number and seasonality was rectified as a result of updating the models used for data adjustment. |
| Responsible person |
Miu Cristina; miu.cristina@insse.ro; tel. 0213181824/1474 |
|
|
|
