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Quality Description of Producer Price Index for Services

• 1. Relevance of statistical information
• 2. Methodological description of survey
• 3. Correctness and accuracy of data
• 4. Timeliness and promptness of published data
• 5. Accessibility and transparency/clarity of data
• 6. Comparability of statistics
• 7. Coherence and consistency/uniformity

1. Relevance of statistical information

1.1 A summary of the information content and purpose of use of the statistics

Producer price index for services describes the price development in business services provided by enterprises to other enterprises and the public sector. The index describes the relative change in prices (e.g. price, volume or value) compared to a certain base period.

The development of producer price index for services was started in 2000, and indices for new service industries are being devised continuously. At the moment, producer price indices for services are calculated for 24 service industries and they are published quarterly for 23 industries, each describing average price development in its respective industry.

One of the key purposes of the producer price index of services is to function as a deflator in national accounts calculations. With it the value of production or sales is converted to volume of production. Enterprises can use the data of the producer price index of services when comparing the price development of their purchases or sales with the average development of the industry.

1.2 Introduction to the concepts essential for understanding the statistics, and the used classifications, research subject, data collector and data providers

1.2.1 Information source

As a rule, price data for the producer price indices of services are collected from enterprises quarterly. Besides the data collected from enterprises, price data or point figures from Statistics Finland’s other statistics are also exploited in the compilation of the producer price indices of services.

1.2.2 Classifications

The industrial classification used in the compilation is the Finnish Standard Industrial Classification TOL 2002, which has been confirmed by Statistics Finland and is based on NACE 2002, the industrial classification of the European Union. As far as appropriate, the services of specific industries are classified into main groups according to the CPA product classification, which is the European Union’s classification of goods and services by activity. Where necessary, detailed product classifications are used within the individual service product categories of the CPA.

1.3 Laws and regulations

The production of the statistics is based on the Statistics Act (280/2004) and on a Council Regulation (EC) concerning short-term statistics (No 1165/1998). Only the data necessary for the calculation of the index but not available from another source are collected from data suppliers. Confidentiality is taken into account when releasing the data; it is not possible to identify from the results information or development concerning an individual enterprise. The producer price index of services belongs to the so-called insider statistics, data from which may not be released to the public before the set of statistics is published.

2. Methodological description of survey

2.1. Compilation of the index

Statistics Finland’s Business Register is used as the sampling frame for the producer price indices for services. The Register contains data on the industry and turnover of enterprises. The indices have been developed independently for individual service industries, which is why the used sampling method varies by industry. Depending on the industry, the data suppliers have been selected either by PPS (Probability Proportional to Size) sampling, judicious sampling or by combining judicious sampling and probability-based sampling. The services for the price monitoring have been selected in co-operation with service enterprises.

The indices of individual industries are Laspeyres indices with fixed weights. Geometric averages of price ratios calculated from the prices of individual service products are combined into indices for the main product groups of an enterprise, and then weighted into its overall index using a specific coefficient for each main group. The weighting coefficients are based on enterprises’ turnover and its distribution between the main groups of the enterprise. The turnover figures used in the weighting are either obtained from the data reported by the enterprises themselves or from Statistics Finland’s Business Register.

The overall index is calculated by means of industry indices. The weights between different industries are based on national accounts data on the use of enterprises’ and the public sector’s services.

Further information about compiling the producer price indices for services is available in the Methodological descriptions (in Finnish) of the statistic.

2.2. Development and publication of new indices

Statistics Finland will enlarge the coverage of industries by developing indices for new services industries. Publication of new indices can commence once data concerning an industry have been collected from an adequately large number of enterprises for at least twelve months and once it has been verified that index figures depicting average price development in the industry can be sufficiently reliably calculated from the prices provided by the data suppliers.

3. Correctness and accuracy of data

The producer price index for services is calculated on the basis of over 17,500 prices collected from approximately 360 data suppliers. The number of prices and data suppliers varies by industry. Roughly 15,000 of price data concern the rents of office and business premises. The producer price index for services describes the relative change in prices compared to a certain base period.

4. Timeliness and promptness of published data

Indices are published on the 17th day or the weekday nearest to it of the month following the end of the statistical reference quarter.

Depending on the industry, the time of collecting price data from enterprises may be the first, second or third month of the quarter under review. In some cases real charged unit prices are collected for the whole quarter under review.

5. Accessibility and transparency/clarity of data

Producer price indices for services is a quarterly statistics. Indices are published on the 17th day or the weekday nearest to it of the month following the end of the statistical reference quarter at 9 a.m. The data are available also from the charged time series database Astika.

6. Comparability of statistics

The time series of the overall index of producer prices for services starts from the year 2005. The length of the industry-specific time series varies depending on when the production of the industry index started.

7. Coherence and consistency/uniformity

Producer price indices for services describe the price development in business services provided by enterprises to other enterprises and the public sector. Consumer services are thus excluded from the producer price index for services. The development of consumer service prices is described with the consumer price index.

Documentation on the producer price index for services is available on the home page of the statistics and the Statistic Finland Unit which produces the statistics. (e-mail pthi.tilastokeskus@stat.fi, tel. +358 9 1734 1 / Producer price index for services).

Information about other price and cost indices is available on the homepage of indices at http://www.tilastokeskus.fi/til/hin_en.html.

Source: Producer Price Index for Services 2007, 3rd quarter. Statistics Finland

Inquiries: Matias Kemppainen (09) 1734 3564

Director in charge: Kari Molnar

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Updated 17.10.2007