This edition provides a comprehensive methodological framework for collection and compilation of international merchandise trade statistics in all countries, irrespective of the level of development of their statistical system. The conceptual framework reflects both the multipurpose nature of these statistics and concern for availability of the adequate data sources and data compilation procedures. It is intended primarily for the producers of international trade statistics, particularly the staff of national statistical offices and/or customs involved in the collection and compilation of merchandise trade statistics, but may be also useful to researchers and other users interested in better understanding the nature of trade statistics.