Producer price index in industry
2. Statistical presentation
Producer price indices in industry (PPI) are used for the calculation of the volume index of industrial production, for estimation of the Gross Domestic Product at constant prices, as well as for economic analysis and international comparisons.
Statistical concepts and definitions
Units of observation – kind of activity units.
Responding units – Enterprises.
Economically active enterprises if their main or secondary activity in compliance with NACE Rev. 2 is Mining and quarrying (Section B), Manufacturing (Section C), Electricity, gas, stream and air conditioning supply (Section D) or Water supply, sewerage, waste management and remediation activities (section E) and the number of employees in the enterprise is 20 or more, or net turnover in the preceding year exceeding 430 thousand euro. Enterprises with as large as possible share of product sales in the respective industrial activity (NACE Rev. 2 class) are included in the sample.
Prices are recorded for products and industrial services sold on the domestic market as well as for exported products and industrial services.
Comparability - geographical
European Union Member states data
The producer price index in industry coverage and level of detail published by the CSB is broader and different from the index coverage published by Eurostat, because it additionally covers NACE Rev. 2:
- Group 30.1 Building of ships and boats,
- Division 37 Sewerage
- Division 38 Waste collection; treatment and disposal activities; materials recovery.
To ensure comparability across countries, coverage and level of detail of producer price indices published by Eurostat is narrower.
Producer price indices by main industrial groupings (intermediate consumption goods, means of production, consumer durables, consumer non-durables, energy) published by the CSB and Eurostat are fully comparable.
Data of the EU member states in Eurostat database:
4. Statistical processing
Information on industrial producer prices is obtained by survey of prices for defined item representatives of goods (services) in specially selected enterprises (targeted sample).
Statistical reports on industrial producer prices 1-RC (monthly) and 2-RC (annual) are used for data collection, as well tariffs approved by the Public Utilities Commission.
Weights are calculated using the data on the value of sold industrial production, 1-r "Survey of industrial activity".
Respondents indicate the actual producer price (excluding the VAT and excise tax) for which a specific product (service) was sold on the 15th day of the reporting month. If there are no sales transactions on this day, price on the day closest to it, is recorded. If a homogeneous group of goods (services) is selected as an item representative, the average monthly prices are indicated.
In 2022, the sample of producer prices includes more than 600 enterprises. Price recording covers 153 classes of NACE Rev. 2. About 2.4 thsd prices are surveyed, of which more than 1.3 thsd are recorded for production sold on the domestic market and around 1.1 thsd for exported production.
The list of enterprises involved in price recording is reviewed every year and enterprises with unstable production operations are excluded, while enterprises playing a significant role in the respective industrial activity are included in the sample. The list of item representatives of goods (services) is also updated on regular basis.
The PPI is calculated by applying a Laspeyres-type formula, which compares the value of the "basket" of item representatives in the reference period with its value in the base period. Prices of December of the previous year serve as the basis for price comparisons. The value of goods sold two years ago in breakdown by NACE sections, divisions, groups and classes is used as weights. In order to ensure symmetry of weights and price base periods, the weights applied to the calculation of the PPI for 2022 have been recalculated into the prices of December 2021.