Value added in industrial statistics and national accounts (Working paper)

UNIDO compiles and provides value added estimates on total manufacturing in its
databases and publications, which are generally derived from two different sources.
On the one hand, detailed structural business statistics data in industrial statistics
(commonly based on surveys and censuses) provide figures on the value added of
manufacturing industries. On the other hand, manufacturing value added measures
an exclusive and exhaustive contribution of manufacturing to the gross domestic
product of an economy and therefore refers explicitly to national accounts concepts.
While it is correctly assumed that these two figures need to be equal in theory, 
they differ in practice, even if structural business statistics data are among the
most important data sources in many countries and play a central role in national
accounts.