Statistics Poland

Trade and Services Department

Statistics Poland

Al. Niepodległości 208, 00-925 Warsaw, Poland

Import price index. The purpose of publishing data on import price indices is to present monthly changes in the prices of imports.

Polish Classification of Goods and Services (PKWiU 2015) and CN (Combined Nomenclature). 

The survey covers imported goods classified to section B, C and D of the Polish Classification of Goods and Services (PKWiU). The source of data for the selection of goods for the survey is information derived from foreign trade statistics.

Observation unit – items of products (CN code).
Reporting unit - industrial and commercial enterprises.

The survey covers about 6200 economic entities employing 10 or more persons.
Units belonging to the population are identified on the basis of the Statistical Business Register (BJS).

Entire country. Poland.

Data are transmitted to Eurostat as price indices with the base year 2015=100.
Nationally data are disseminated with reference to various base periods, for example - corresponding period of the previous year, previous month of the current year.

Data are collected at current basic prices in PLN.

Month (monthly average price).

Regulation (EU) 2019/2152 of the European Parliament and of the Council of 27 November 2019 on European business statistics repealing 10 legal acts in the field of business statistics. Implementing Regulation (EU) of the Commission 2020/1197 of 30 July 2020 laying down technical specifications and arrangements pursuant to Regulation 2019/2152 of the European Parliament and of the Council on European business statistics repealing 10 legal acts in the field of business statistics.

Data on Import price index are transmitted to Eurostat, National Bank of Poland, government administration.

All statistics collected and published by Statistics Poland's are governed by the Act  on Official Statistics. This Act establishes the statistical independence of Statistics Poland. Statistics Poland cannot publish, or otherwise make available to any individual or organization, statistics that would allow the identification of data for any individual person or entity.

The question of confidentiality is explained in the art. 10, 38 and 38a of the Act on Official Statistics.

Confidential data are treated in accordance with the policy described in the item 7.1. The following data are subject to special protection and are not disseminated:

• data for individuals,
• aggregates consisting the values for one or two entities,
• aggregates with the share of one entity higher than the three-fourths of the total value in aggregate.

Advance dissemination of release calendar : Import industrial price indices are published around m+45.

The statistical release dates according to the preannounced schedule are publicly accessible on the Statistics Poland website.

Editorial Title Plan 

Eurostat Release Calendar

Article  14 point 2 of the "Act on  Official  statistics" states that shall provide equal, non-discriminatory and simultaneous access to statistical information, and especially to major figures and indicators.

Data are released simultaneously to all users and are available on Statistics Poland's website (http://stat.gov.pl/en/) in the form of announcement.

Monthly – both to Eurostat and nationally.

Data are made available in publications of Statistics Poland and online databases made available via the Official Statistics Information Portal www.stat.gov.pl.

• “Yearbook of Foreign Trade Statistics of Poland”: — Import and export price indices according to PKWiU - annually, based on previous period = 100,
• “Prices in the national economy in the years...”: — Import and export price indices of industrial products according to PKWiU - annually, based on previous year = 100, 2010=100, 2015=100,
• “Statistical Yearbook of Forestry...”: — Import and export price indices according to PKWiU and PKD divisions in the wood sector — annually, based on previous year = 100

Analytical Platform - Knowledge Databases - prices:

• Price indices of imports and exports by PKWiU – monthly

 • Price indices of imports and exports by PKWiU – monthly cumulative

No access to micro-data.

Data are sent to Eurostat both to be used in European aggregates as well as to be released as national data.

Documentation on methodology available on Statistics Poland's website Statistics Poland / Topics / Prices, Trade / Prices / Methodological report Price indices of exports and imports

According to article 3 of Act  on Official Statistics - the official statistics shall ensure reliable, objective and systematic information for the society, the state and public administration bodies and economic entities. Documentation on procedures applied for quality management and assessment is available on the website: Quality in statistics.

The legal basis of the quality measurement and assessment is the internal Regulation of the President of Statistics Poland No. 35 of 28th December 2011 which came into force in the 4th quarter of 2012. The quality assessment of statistical surveys is conducted according to an annual quality program for the official statistics which is in line with the Regulation of the President of Statistics Poland No. 35 of 28th December 2011. 

The quality of statistical surveys is assessed  by means of standard quality reports and quality indicators recommended in the ESS Handbook for Quality Reports with further amended versions as well as by self-assessment checklist and quality audits and reviews. The price indices for the surveyed month, both on the level of enterprises and NACE groups, are analysed taking into consideration the enterprises in case of which the price indices differ from an average national price index for the given NACE group. The aim of this analysis is to confirm a real price movement in an enterprise (a drop or a growth) or to detect incorrect calculation of the index due to errors reported in the questionnaire. When an error is detected an impact of this error on the index of an enterprise is analysed.

Relevance of data means the extent to which the survey meets current and potential user requirements. In order to meet the needs and improve the satisfaction of the users, analyses of the data ordered are carried out. In the absence of data or the inability to make data available due to statistical confidentiality, the data aggregates closest to the demand of users are provided. The data are made available in accordance with the deadlines contained in the survey schedule. In case of individual orders, delivery dates are agreed each time with the ordering party. The dataset is analysed in detail in terms of comparability of goods (type, model, kind) in subsequent reporting periods, so that the examined price refers to the same goods.

The report on user satisfaction is available on the Statistics Poland's website (in Polish).

Eurostat and internal users use them for economic analysis. Enterprises use them for indexation of contracts and as economic indicators. Researchers and students need them for economic analysis.

See point 3.3

The criterion of accuracy of the data is understood as the convergence between the actual value of the population parameter and the resulting value of its estimate (after collection, imputation, estimation of data, etc.). The survey is estimated to have a low level of under-coverage errors. In order to reduce these errors and to ensure that the sample is representative, goods and reporting units are analysed and verified.

The indicator is based on exhaustive import figures from international trade statistics.

The response rate is about 97.5%. Actions to  increase the rate of response are telephone and e-mail contacts with  the reporting units  and analysis of the reasons for their  non-response.

This indicator is released 45 days after the end of the reference period. The monthly data is considered to be definitive one year after the end of the calendar year in which the reference month falls.

100% releases delivered on time according to the scheduled release dates.

The same statistical concepts and classifications are applied in the entire national territory. Definitions and classifications applied accordance requirements of EU regulations. The data are comparable from country to another. However, the countries may apply different collection and calculation methods for the data. No geographical regions, Poland as a whole.

Comparability of surveyed data is ensured, among other things, by applying conversions to comparable values, e.g. base periods, linkage keys (in case of changes in classification). No breaks in time series or other changes affecting temporal and spatial comparability occur during the performance of the survey.

The IPI is not compared or confronted with other data.

Lower level aggregations are derived to the higher level indices according CPA 2.1.

In 2022 the costs of the NSI where approximately 1205 hours per year, burden of respondents – approximately 6068 hours per year.

Data released on the website has the same revision policy as data sent to Eurostat.

The same revision practice is used for all the data in the short-term statistics unit. Data marked as provisional are revised when actual data are received and estimates are replaced.

The survey of import price indices is carried out by means of observation of representative items on a purposively selected sample of goods and enterprises on a monthly basis.. The selection of goods and enterprises for the survey is based on data from foreign trade statistics for previous years. On the basis of business registers and the volume and regularity of turnover recorded in foreign trade statistics, a representative group of enterprises is selected, for each chosen for the survey group of goods (8-digit CN level). Enterprises with a significant turnover in the selected CN groups are classified for the survey.

Monthly collection of data.

Questionnaires used in the survey: one type of questionnaire. Prices are collected through an electronic reporting form, which is sent out to selected companies. The questionnaires are filled in by the reporting units on which the reporting obligation was imposed. Non-response is monitored by means of the completeness reports.

Prices data are reviewed by the price statistics staff. In case of problems or doubtful cases the respondents are contacted for clarification. The price statistics staff verifies the computation of the index at various stages of its compilation. Checks are carried out at the time of data collection and throughout the production chain indices.

Price indices at the level of the representative item are calculated as geometric mean. For higher levels of aggregation the price indices are calculated using the Laspeyres formula, i.e., as weighted averages of the price indices of lower level aggregates.

The weighting system for the appropriate levels of PKWiU for calculating aggregate indices (price indices) is created based on the share of turnover in imports using data from foreign trade statistics. Thus, a system of differentiated weights, called share weights, is in force. The weights are updated every five years. The degrees of aggregation and hence the levels for which the weights have to be created are determined by the classification structure according to which the price indices are calculated.

The import price index is not seasonally adjusted.

Data are sent to Eurostat voluntarily