D. Examples of the merging of data from other administrative sources with customs data
7.15. Uganda: use of data of the commodity authority. In Uganda, the commodity authorities submit monthly reports to the Uganda Bureau of Statistics (UBOS) for coffee, tea, tobacco and cotton to complement customs data. The data provided contain variables like commodity name, quantity, value, month, country of destination and, sometimes, the name of the company. The customs data is then compared with the commodity authority’s data to determine the accuracy and reliability of the data for each commodity. Normally, the Uganda Bureau of Statistics adopts the commodity authority’s data which appear to be reliable and are based on actual flows realized in a month. The data structure of the commodity authority’s data is then aligned to the customs structure, by coding the above variables and creating more relevant variables before data merging. Merging is carried out once the structures of the two data sets are aligned.
7.16. Norway: use of ship registers. In Norway, the external trade of ships, aircrafts and movable drilling rigs is not properly covered by data from customs. Statistics Norway regularly receives information from Norway’s shipping registers (NIS and NOR) about new registrations, cancellations and other changes in the registers. Based on this information, a letter and a form are sent to the registered owner, asking for additional information (see chap. III and annex XXIII.B for details).