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  Mentions légales
The CEPII has constructed a database called CHELEM. It is made of three sub-databases which make it possible to analyse the relative positions of individual countries and their interdependence within the global economy. The CEPII has decided to make the data and its economic indicators publicly available, so that the whole CHELEM database is now distributed on CDROM and online Harmonised Accounts
on Trade and The World Economy


World Economic Overview
These databases are brought together using a common geographic classification, which allows users to construct a whole range of specific indicators. Long term, annual data are available on all three databases, stretching back to 1960 or 1967. Together, the databases constitute a coherent view of the world economy, and are updated every year. CHELEM's common classification system breaks down the world intro 94 elementary geographic zones, one zone of not elsewhere specified and the total of the world. One can distinguish:- the 70 most important countries (or groups of countries), which account for 97% of world trade and 98% of world output;- 12 geographic zones that group together all other countries. This detailed geographic classification can be used to provide aggregate figures for any trade zone required by the user. While they were originally set up to meet the CEPII's research needs, they are used increasingly by other French and international economists.

The Three Databases
The International Trade Database (CHELEM-IT) brings together flows in trade, which are broken-down either into 71 CHELEM product categories, 43 GTAP products or 147 ISIC (4 digit). These trade figures are given in current US dollars (millions), and are available from 1967. Trade statistics for flows between geographic zones (countries and country groups) are provided for each year, and for each product category, in a single, " harmonised " matrix. Similarly, product categories can be aggregated as necessary: by Chain, Stage, Branch, Sector or Industry.

International Trade
The GDP Database (CHELEM-GDP) provides data on economic aggregates, running from 1960. The data covers the world both at the level of CHELEM's 94 elementary zones and for the 204 independent countries and territories for which data is available. A particular effort has been made to provide statistics on the countries of the Former soviet Union. Five data series are provided for each country or zone, including: total population (in millions of inhabitants); value GDP expressed in current US dollars (millions) on the basis of current, national prices converted using nominal exchange rates to the dollar; volume GDP expressed in constant US dollars (base year 1995) and based on constant, national prices; volume GDP expressed in PPPs (purchasing power parities) in international prices and converted in constant US dollars (millions - base year 2005), and lastly; the nominal exchange rates for all independent countries.

GDP Database
The Balance of Payments Database (CHELEM-BOP) contains data on balance of payments, stretching back to 1967, and covering the whole world. Figures are available for 199 countries, as well as for the 94 elementary zones of the common classification, and for all international organisations. The data is provided in current US dollars (millions) adopting the 133 headings of the IMF, and is completed and corrected. It includes aggregate figures for 49 headings, for invisible flows, capital movements and monetary transactions. In addition, 27 principal balances are calculated.

Balance of Payments Database
CHELEM's systematic coverage of the world, the coherence of the system and the harmonisation of its classification make it possible to use the three databases to calculate easily a number of key statistical indicators, including: structural ratios, trade balances, export cover, imports and exports per capita, annual growth, flow hierarchies or cumulative balances. The CEPII has also developed a number of indicators for analysing international trade in particular. These can only be calculated by using all three databases. The indicators are set out in the programme used to access the CDROM, which also explains how they are calculated. Indicators
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