B.3. Using big data for purposes of official statistics on the international supply of services
10.10. Examples of big data that can be used for compiling statistics on the international supply of services include electronic medical records of hospital visits (may aid in compiling health services), mobile phone records (helpful in tracking movement of international visitors) and credit card records (may be useful in tracking a wide range of tourism expenditures and in compiling other trade in services transactions). Such data can be used provided that the operators and merchants involved are identified in those data as belonging to service industry. More information on such applications is included in the following sections of the present chapter.
10.11. Compilers are, therefore, encouraged to treat big data as a potential new data source and to undertake pilot projects in selected areas. It should be noted that seizing the potential of big data would require attention to the organization of an efficient data integration process and a review of existing methods for data modelling, estimation and imputation. All such modifications to the statistical process should be done in a transparent way, be part of a quality assurance programme and be properly reflected in the metadata.