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statistical frameworks, represents a significant step
toward building links between these two bases. This
linkage poses a challenge to statisticians who may draw
on expertise and information spread among central
banks, national statistical offices, and government
ministries. As statistics on trade in services are
developed, close cooperation will be required among the
institutions involved.
1.13. Measurement of trade in services is inherently
more difficult than measurement of trade in goods.
Services are more difficult to define. Some services are
defined through abstract concepts rather than by any
physical attribute or physical function. Unlike trade in
goods, for trade in services there is no package crossing
the customs frontier with an internationally recognised
commodity code; a description of the contents;
information on quantity, origin, and destination; an
invoice; and an administrative system based on customs
duty collection that is practised at assembling these data.
The required information on services trade, once defined,
is dependent on reaching a common understanding of
concepts with data providers. It depends on information
that may be reported either from business accounting and
record keeping systems or by individuals, and on a
variety of data sources, including administrative sources,
surveys, and estimation techniques.
1.14. National agencies need to weigh the demand of
users for more detail about services trade against the cost
of collection, the burden of extra information provision
on business, and the need for certain minimum quality
thresholds. As with other statistical data collections,
there is a requirement in most countries to protect the
confidentiality of individual firms’ data. These
constraints and considerations limit in a very real sense
the amount of detail on international trade in services
that it is practical to provide. The level of detail set out
in the
Manual accordingly represents a compromise
between the need that trade negotiators, analysts, and
policy makers have for information and the difficulties
of data collection that national agencies may encounter.
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