Transcript ac258 P4 e

Options for national implementation
of ISIC
United Nations Statistics Division
Purpose of ISIC
• Since its creation in 1948, ISIC had two
goals:
• Provide a tool for international comparison
• Provide guidance to countries for a national
activity classification structure
• Increasing need for detailed internationally
comparable data has led to more detailed
versions of ISIC
2
National classifications
•
How can national classifications be
structured?
1. Using ISIC as a starting point
2. Based on historical national versions
3
Using ISIC as a basis
Link link
between
ISIC
and NACEtruncation”
Combining
ofthrough
ISIC
categories
ISIC
“numerical
•
Countries that use ISIC as a basis for their national
ISIC Rev.4
National
Classification
classification,
can
do
this
to
varying
degrees:
ISIC
Rev.4
NACE
Rev.2
ISIC Rev.4
National
Classification
2311 Manufacture of flat glass
Manufactureof
offlat
flatglass
glass
Manufacture
Manufacture and processing of other glass
2310 Manufacture
of glass
and“as-is”
glass
1. Adopt
ISIC
Shapingand
andprocessing
processingofofflat
flatglass
glass
Shaping
products
2310 Manufacture of
of glass
glass and
and
Manufacture
ofhollow
hollowglass
glass to reflect
2. glass
Use
complete ISIC and
add subdivisions
Manufacture
of
2391 Manufacture
ofthe
refractory
products
products
Manufactureof
ofofglass
glass
fibres products and clay
Manufacture
fibres
products nationally important industries
Manufacture
refractory
(but
maintain
the ISIC
Manufacture
and
processing
of
otherglass,
glass,
Manufacture
and processing of other
building
materials
coding structure) – can be
“numerically
truncated” back to
including
technicalglassware
glassware
including
technical
2392 Manufacture of clay building
of refractory
refractory
2320 Manufacture
Manufactureof
ofrefractory
refractoryproducts
products
2391 Manufacture
of
23910
ISIC [Example]
materials
2311
23101
2319
2312
23102
2313
23103
2314
23104
2390
2319
23109
products
2331 Manufacture
Manufacture
ceramictiles
tiles
andflags
flags
ceramic
and
3. As above, but with 23921
changes
of theofofcoding
structure
of clay
clayis
building
2392 Manufacture
of
building
International
comparability
reduced
2332 Manufacture
Manufactureof
ofbricks,
bricks,tiles
tilesand
andconstruction
construction
23922
(example:
NACE)
–
requires
correspondence
table
materials
products, in
inbaked
bakedclay
clay
products,
Correspondence table is required.
[Example]
4. Elevating
lower
level ISIC categories to higher national
comparability
is maintained.
maintained.
International
comparability
is
However,
correspondence
table is required.
No
additional
tools are
required.
levels,
(e.g.
combine
ISIC categories at 2- or 3-digit level)
[Example]
4
Using ISIC as a basis
• The first three methods maintain full
comparability with ISIC at all levels (although
option 3 may not be very intuitive)
• Option 4 limits internationally comparability to
a higher aggregation level only
• Is use of the same coding as ISIC 4 a
requirement? - No, but it makes comparisons
easier.
5
Using historical national
classifications as a basis
• Using non-ISIC based classifications
always creates difficulties for international
comparison
• Correspondence tables are necessary
• May limit data conversion due to splits
• Efforts are encouraged to line the historical
versions up to ISIC
• At detailed level (without considering
aggregation structures) or
• By lining up individual sections
6
What detail should be considered?
• Minimum level of data reporting has been
agreed at 2-digit level
• However, most statistics and users will
require more
• Due to size and confidentiality reasons, not
all detail may be useful for all countries
• BUT: classification for collection may be
more detailed than for distribution of data
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What level should be considered?
• Using more detail for collection allows for
future adjustments if individual industries
are growing
• Level of detail for publishing depends on
type of statistics anyway
• No fixed guidelines exist for the proper
choice of detail
8
Options to consider or avoid
• ISIC structure and definition are based on
few criteria (input, process, output, use of
outputs)
• Should other criteria be added for national
purposes, such as private vs. public entity,
manufacturing by hand (crafts) vs.
manufacturing by machines?
• What are the applications?
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Options to consider or avoid
• When introducing additional detail, check if the
specialization for this activity really warrants a
separate class
• When following the ISIC structure and coding
system, don’t renumber codes if you want to skip
a code number (e.g. due to absence of that
activity)
• The activity may still exist illegally (or appear in the
future) and should be accounted for in the SNA
• Renumbering makes the ISIC link less intuitive
10
Rules for good housekeeping
• If a category at level n is not further
subdivided, the code at level n+1 should be
the same code with a “0” appended
• Use digit “9” for residual categories
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The situation in the EU and the ESS
Regulation (EC) No 1893/2006 of the European Parliament and
of the Council of 20 December 2006 establishing the statistical
classification of economic activities NACE Revision 2
Article 4 - National classifications of economic activities
1. Member States' statistics presented according to economic
activities shall be produced using NACE Rev. 2 or a national
classification derived therefrom.
2. The national classification may introduce additional headings
and levels and a different coding may be used. Each of the levels,
except for the highest, shall consist of either the same headings as
the corresponding NACE Rev. 2 level or headings constituting an
exact breakdown thereof.
12
National subdivisions of NACE in the
EU Member States and the ESS
• 23 UE Member States (+ Norway) have
national subdivisions of NACE Rev. 2.
• Exceptions are:
•
•
•
•
•
Bulgaria
Hungary
Romania
Ireland
Malta
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National subdivisions of NACE in the
EU Member States and the ESS (cont.)
Creating a national subdivision by adding an
additional coding level (1):
• NACE Rev. 2 class 41.20
• National class:
• 41.20.1
• 41.20.2
• 41.20.9
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National subdivisions of NACE in the
EU Member States and the ESS (cont.)
Creating a national subdivision by adding an
additional coding level (2):
• NACE Rev. 2 class 41.20
• National class:
• 41.201
• 41.202
• 41.209
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National subdivisions of NACE in the
EU Member States and the ESS (cont.)
Creating a national subdivision by adding an
additional coding level (3):
• NACE Rev. 2 class 41.20
• National class:
• 41.20.10
• 41.20.20
• 41.20.90
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National subdivisions of NACE in the
EU Member States and the ESS (cont.)
Creating a national subdivision by adding an
additional coding level (4):
• NACE Rev. 2 class 41.20
• National class:
• 41.20.A
• 41.20.B
• 41.20.C
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National subdivisions of NACE in the
EU Member States and the ESS (cont.)
Creating a national subdivision by adding an
additional coding level (5):
• NACE Rev. 2 class 41.20
• National class:
• 41.20A
• 41.20B
• 41.20C
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National subdivisions of NACE in the
EU Member States and the ESS (cont.)
Creating a national subdivisions by adding
additional codes to the EU NACE coding,
within the four-digit structure (only Spain):
• NACE Rev. 2 class 41.20
• National class:
• 41.21
• 41.22
• 41.29
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