Merchandise Trade Price Index Database
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For further information, contact the OECD Statistics Directorate at: STAT.Contact@oecd.org

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Yearly

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UN COMTRADE

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Yearly

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Ratio
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CPA version 2.1

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Constructing trade price indices from detailed merchandise trade data using unit values requires an intricate process of data cleaning. A wide variation in unit values is typically observed for individual commodity codes, at least partially attributable to erroneous data in customs declarations, which requires a sophisticated method to detect outliers but one that still retains sufficient observations to reliably reflect price change of the product group. This approach builds on previous efforts, and refines them through the incorporation of three-stages of outlier removal process.

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Laspeyres Price Index. Paasche Price Index is available on request. Fisher Price Index can be also derived from the Laspeyres Price Index and Paasche Price Index.

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Unit values are defined by trade value over quantity. These unit values are then divided by the unit values of the previous year to obtain unit value indices at HS 6-digit level. Unit value indices are then aggregated over countries and commodities using the Laspeyres formulae (weighted). Paasche index is available on request.

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Wherever possible the unit value index estimates are validated and compared with existing data, including implicit price deflators from national accounts, official price indices for selected countries at the Standard International Trade Classification (SITC) 1-digit level, and global commodity prices.

Merchandise Trade Price Index DatabaseAbstract

Despite the growing importance of international trade, driven in large part by the rise of globalisation and the accompanying international fragmentation of production, the availability of statistics on price change in international merchandise trade at more graular level is still limited. To fill this data gap, the OECD has developed this new Merchandise Trade Price Index (MTPI) database using UN COMTRADE. The first release covers about 100 countries from 2011 to 2017. Indices by reporting country are available for both exports and imports, broken down by 30 products, aligned with the 2-digit level of the Classification of Products of Activity (CPA, version 2.1). Future releases are planned to expand the country coverage and the level of disaggregation.

For methodology, refer our aritcle in the OECD Statistics Newsletter (PDF). Full statistical working paper is scheduled to be released early 2020.https://issuu.com/oecd-stat-newsletter/docs/oecd-stats-newsletter-dec-2019/14?e=19272659/70349788].
Contact person/organisation

For further information, contact the OECD Statistics Directorate at: STAT.Contact@oecd.org

Data source(s) used

UN COMTRADE

Source Periodicity

Yearly

Unit of measure usedRatioPeriodicity

Yearly

Key statistical concept

Unit values are defined by trade value over quantity. These unit values are then divided by the unit values of the previous year to obtain unit value indices at HS 6-digit level. Unit value indices are then aggregated over countries and commodities using the Laspeyres formulae (weighted). Paasche index is available on request.

Classification(s) used

CPA version 2.1

Estimation

Constructing trade price indices from detailed merchandise trade data using unit values requires an intricate process of data cleaning. A wide variation in unit values is typically observed for individual commodity codes, at least partially attributable to erroneous data in customs declarations, which requires a sophisticated method to detect outliers but one that still retains sufficient observations to reliably reflect price change of the product group. This approach builds on previous efforts, and refines them through the incorporation of three-stages of outlier removal process.

Validation

Wherever possible the unit value index estimates are validated and compared with existing data, including implicit price deflators from national accounts, official price indices for selected countries at the Standard International Trade Classification (SITC) 1-digit level, and global commodity prices.

Index type

Laspeyres Price Index. Paasche Price Index is available on request. Fisher Price Index can be also derived from the Laspeyres Price Index and Paasche Price Index.