United Nations Industrial Development Organization
访问日期： 23 一月, 2018
United Nations Industrial Development Organization (UNIDO) produces value added estimates of manufacturing activities at two levels – the sector level (often termed industry value added) and the aggregated level, referred as manufacturing value added (MVA).
Manufacturing value added (MVA) of an economy is the total estimate of net-output of all resident manufacturing activity units obtained by adding up outputs and subtracting intermediate inputs. Measurement of MVA requires appropriate demarcation of the type of economic activity and of the territory in which the activity takes place. However, in practice, MVA cannot simply be derived by adding up all industry value added figures because of the complexity associated with survey methods. Industry value added may not cover all activity units engaged in manufacturing due to the incomplete frame used in the survey. On the other hand, activity units are often classified as manufacturing based on their primary activity. This implies that secondary activity can often be of a non-manufacturing nature. Such discrepancies are resolved in the process of compiling national accounts using supply use or input-output tables. Thus, MVA measures an exclusive and exhaustive contribution of manufacturing to GDP.