In order to improve data collection and compilation, and to increase comparability of time-series data across countries, recommendations made international organizations (such as the IMFs Balance of Payments Manual, 5th ed. or the OECD´s Benchmark Definition on FDI, UN et al, Manual on Statistics of International Trade in Services, etc) provide guidelines for definitions and methodologies of FDI statistics.
Implementation of the aforementioned guidelines and recommendations will greatly enhance comparability and analytical value of statistics on FDI and operations of TNCs. In an effort to harmonize FDI data collection systems, UNCTAD provides technical assistance
, on demand, to countries that need training in implementation of these guidelines.