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| The Data: Coverage, Periodicity, and Timeliness | ||||||||||||
| Coverage characteristics | 5.1.1 Statistical presentation The wholesale price index (WPI), which is compiled by the National Institute of Statistics and Data Processing (INEI), is of the Laspeyres type (1994=100) and measures trends in the prices of a representative group of goods traded on wholesale markets in 25 Peruvian cities.
The WPI covers 394 products, classified by sector (agriculture and livestock, fishing, and manufacturing) and by source (domestic and imported). Prices are collected from some 520 establishments twice a month in metropolitan Lima and 25 cities of the interior, inclusive of taxes and shipping costs.
The weights used to calculate the index are derived from the 1994 input-output table, the INEI’s national accounts, reports of the National Superintendency of Tax Administration (SUNAT), and the publications of relevant ministries.
The data are not seasonally adjusted. | |||||||||||
| Periodicity | 4.1.1 Periodicity Monthly | |||||||||||
| Timeliness | 4.1.2 Timeliness The first working day of the month after the end of the reference month. | |||||||||||
| Access by the Public | ||||||||||||
| Advance dissemination of release calendar | 5.1.3 Advance release calendar The Central Reserve Bank of Peru (BCRP) publishes a quarter-ahead advance release calendar, providing precise release dates, on its website (http://www.bcrp.gob.pe/English/WMetadata/Adv_Rel.htm | |||||||||||
| Simultaneous release to all interested parties | 5.1.4 Simultaneous release The data are released simultaneously to all interested parties on the first day of the following month, in the INEI’s press release “Variación de los Indicadores de Precios de la Economía” (Indicators of Prices in the Economy) and in the official gazette El Peruano.
The data are also released simultaneously to all interested parties on the first business day of the following month, on the BCRP website (http://www.bcrp.gob.pe/English/WMetadata/Adv_Rel.html), as well as in the Nota Semanal (Weekly Report), which is posted on the BCRP website (http://www.bcrp.gob.pe) every Friday and published in hard copy the following Tuesday. | |||||||||||
| Integrity | ||||||||||||
| Dissemination of terms and conditions under which official statistics are produced, including those relating to the confidentiality of individually identifiable information | 0.1.1 Responsibility for collecting, processing, and disseminating statistics Instituto Nacional de Estadísticas e Informática Compilation and publication of the data are governed by the Law on the Organization and Functions of the INEI (the INEI Law—Legislative Decree 604). 0.1.3 Confidentiality of individual reporters' data Instituto Nacional de Estadísticas e Informática The INEI Law stipulates that data provided to the Peruvian statistics system is confidential and cannot be disclosed individually, even under administrative or judicial order. 1.1.1 Impartiality of statistics Instituto Nacional de Estadísticas e Informática The INEI Law establishes the technical autonomy of the INEI, with respect to the data compilation rules. 1.2.1 Disclosure of terms and conditions for statistical collection, processing, and dissemination Instituto Nacional de Estadísticas e Informática The INEI Law can be obtained on request (Phone: 51 1 4334223; e-mail: webmaster@inei.gob.pe). | |||||||||||
| Identification of internal government access to data before release | 1.2.2 Internal governmental access to statistics prior to release Instituto Nacional de Estadísticas e Informática No officials outside the INEI have access to the data before their release to the public. | |||||||||||
| Identification of ministerial commentary on the occasion of statistical releases | 1.2.3 Attribution of statistical products Instituto Nacional de Estadísticas e Informática There is no ministerial commentary accompanying the release of the data. | |||||||||||
| Provision of information about revision and advance notice of major changes in methodology | 4.3.1 Revision schedule The data are final when first released and are not subject to revision. 1.2.4 Advance notice of major changes in methodology, source data, and statistical techniques. When the base period is changed, a methodological note is published by the INEI at the time the change is introduced. | |||||||||||
| Quality | ||||||||||||
| Dissemination of documentation on methodology and sources used in preparing statistics | 5.2.1 Dissemination of documentation on concepts, scope, classifications, basis of recording, data sources, and statistical techniques Information on the methodology and data sources can be found in the Central Bank document Guía Metodológica de la Nota Semanal (January 2004). (See also summary methodology) | |||||||||||
| Dissemination of component detail, reconciliations with related data, and statistical frameworks that support statistical cross-checks and provide assurance of reasonableness | 4.2.1 Internal consistency In addition to the general index, the press release contains any percentage change in the WPI, broken down by sector and by source for the current month compared with the previous month.
The INEI’s Boletín Mensual de Indicadores de Precios de la Economia contains detailed data, broken down by sector (agriculture and livestock, fishing, and manufacturing) and by source (domestic and imported).
Since December 2001, the BCRP’s Nota Semanal has contained monthly data on percentage changes in the WPI and its components: domestic and imported goods.
The index and the annual and cumulative changes are also published in the same way. 4.2.2 Temporal consistency The BCRP’s Memoria (annual report) contains monthly data for the last 10 years on monthly and cumulative percentage changes over the last 12 months and annual data on annual average percentage changes in the WPI. | |||||||||||
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