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  Mentions légales
MAcMap FAQ
Presentation FAQ Updates Release schedule Download Development Bibliography Contact
What are the different products of the MAcMap family?
    Basically, three products are associated to the MAcMap denomination:
  • The MAcMap “Tariff Lines level” database, yearly updated, sold and managed by the ITC.
  • The MAcMapHS6 database. It is an harmonized version of the previous one, for one year (actually 2001). It is built and updated by the CEPII but sold by the ITC (see below).
  • The “MAcMap for GTAP” distribution. It is an aggregated version of MAcMapHS6 in the GTAP nomenclature and it is freely available in the Dowload section of this webpage.
 
How can I have access to the full distribution of MAcMapHS6v1?
Since ITC provides us the major part of the raw data, they retain some property rights about the MAcMapHS6 database.

In order to have access to the HS6 version of MAcMapHS6v1, you have to follow this procedure:
  • Contact the ITC and ask for a subscription to MAcMap, in order to have access to the MAcMapHS6 version, managed by the CEPII. The Academic community benefits from a special price (USD900), as institutions from developing countries (USD450). Moreover, currently, Least Developed Countries have a free access to MAcMap through the USAID program.
  • Provided the ITC has granted you the rights to MAcMap, we can give you access to MAcMapHS6. Please contact the .
  
What are the rules for using the free access materials on this website?

These materials could be freely used given a clear notification of the data sources.
The website address (http://www.cepii.org/anglaisgraph/bdd/macmap.htm) should be indicated as any relevant references.

In a general framework, please quote the following paper:
BOUËT, A., DECREUX, Y., FONTAGNÉ, L., JEAN, S. & LABORDE, D. “A Consistent, Ad-Valorem Equivalent Measure of Applied Protection Across the World: The MAcMap-HS6 Database” , CEPII Working Paper N°2004-22, http://www.cepii.org/anglaisgraph/workpap/summaries/2004/wp04-22.htm.

In the download section, the relevant references are given for each dataset.

  
What are the main operations applied to the raw protection data?

If a large part of the job deals with harmonisation and aberrant values hunting, some important tasks are performed in order to obtain the MAcMapHS6 distribution starting from the raw data (at the tariff line level). In particular:

  • Management of the mixed tariffs, i.e. including operator such as MAX and MIN between Ad Valorem and Specific tariffs. In these cases, the Ad Valorem component is always selected;

  • From the tariff lines level to the HS6 (first stage of common nomenclature) a simple average is performed across products belonging to the same HS6 code;

  • Computation of relevant unit values to convert specific component in Equivalent Ad Valorem duties;
  • Specific treatment of the TRQs.
  
Does MAcMapHS6v1 give an exhaustive description of the worldwide pattern of protection?
MAcMapHS6v1 provides an exhaustive but not full description. That means that not all bilateral relations for every product are covered. We keep only rows (product-exporter-reporter relation) for which a Reference Group weights exists i.e. the exporter export to at least one of the country that belongs to the reference group of the importer.

For information, the size of the different databases is:
  • Complete bilateral database (given the information available): 235 millions of rows;

  • MAcMapHS6v1 (restriction to existing reference group weights): 35 millions of rows;

  • Restricted dabase to existing bilateral trade relations: 7 millions of rows.
  
What does the “Reference Groups” concept implies for the MAcMapHS6 dataset?
The CEPII’s works on applied protection data rely on the concept of “Reference Groups” for two independent elements:
  • For the construction of the dataset and the computation of unit values. Countries are gathered in “Exporter Reference Group” in order to determine the unit values for the conversion of specific tariffs. It is a compromise between bilateral unit values (to be used if they were not so noisy due to measurement mistakes) and world unit values (more robust but neglecting the discriminatory impact of specific tariffs on low prices exporters);
  • For the aggregation methodology since we propose an alternative weighting scheme to the classic trade weighted one in order to limit the endogeneity problem. So, we do not take bilateral trade flows but for a given product the trade between the exporter and the Reference Group of the Importer. (Please give a look at the MAcMap presentation – slide #6 - for an illustrative graph).

So, for a user of the MAcMapHS6v1 dataset, the Reference groups approach has an impact on the definition of ERGUV (unit value) and on the size of database (not restricted to existing bilateral trade flows). The use of MAcMap Reference Groups weights for aggregation are purely optional.

It is noteworthy to remember that the Reference groups are not built on ad-hoc criteria but using a clustering methodology based on Purchase-Parity-Power Income per capita and degree of openness in order to gather countries that should present similarities in trade patterns.