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| IND104F - Monthly industrial production indices by industrial activities CANE Rev.2 - working day adjusted series - base year 2005 |
| Definition |
The industrial production index (IPI) measures the evolution of the results of industrial activities from one period to another, this being a Laspeyres-type volume index, calculated from the series of representative products at the level of each industrial activity and their weight (gross added value at the cost of factors in the base year). |
| Periodicity |
Monthly |
| Data sources |
Statistical researches IND for years 2000-2004
Statistical survey on industrial products and services - monthly, since 2005 details |
| Methodology |
In order to adjust the series (level, division, section, total industry ' CANE Rev. 2, broad industrial group) DEMETRA programs package (TRAMO/SEATS method) was used, estimating the effect of working days number, different from one month to another and the calendar effect (Orthodox Easter, bisect year and other national holidays) as well as for the identification and correction of outliers (occasional, transition or permanent changes) and interpolation of missing values.
Adjusted series with working days number was obtained eliminating from unadjusted series those effects by means of correction coefficients, set up according to the regression model used (additive or multiplicative).
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 change in the adopted models, number of regressors used and number of available observations).
Aggregated levels (section, total industry, broad industrial groups) were adjusted by means of 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 their original components).
The industrial production indices are provisional and are revised based on the corrections retroactively done by the enterprises in the sample, concerning the data previously provided.
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| Last update |
FEB 14, 2013 |
| Observations |
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 |
Baicoianu E. Violeta Roxana; e-mail: violeta.baicoianu@insse.ro; tel. 0213177775 |
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