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The
Data: Coverage, Periodicity, and Timeliness
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Coverage
characteristics
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5.1.1 Statistical presentation
- The
Consumer Price Index (CPI) is a Laspeyres
index（2016=100）covering
the whole national territory to measure the price movements of goods
and services purchased by households for consumption purpose.
- The CPI
covers 368 representative goods or services. Item prices are
collected monthly in 17 cities or counties. Approximately
33,000 prices quotes are obtained each month, and the quotes
are obtained mostly by personal interview.
- The
weights are based on the 2016 Household Final
Consumption Expenditure of National
Income, and will be updated
annually from 2018.
- Seasonally
adjusted and unadjusted indices are simultaneously provided.
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Periodicity
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4.1.1 Periodicity
Monthly
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Timeliness
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4.1.2 Timeliness
Around
the fifth working day (subject to postponement due to Chinese Lunar New
Year or other consecutive public holidays) after the end of the reference
month.
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Access
by the Public
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Advance
dissemination of release calendar
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5.1.3
Advance release calendar
- In
principle, the press release is made around the fifth working day
(subject to postponement due to Chinese Lunar New Year or other
consecutive public holidays) after the end of the reference month. The date of the next release is
announced in each news release.
- A
schedule of the precise release dates for the Calendar year is
listed on the website:
http://win.dgbas.gov.tw/dgbas03/bs7/sdds/english/calendar.htm
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Simultaneous release to all interested parties
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5.1.4 Simultaneous release
- Subject
to embargo, no information is released prior to the official
release. The data are released to all interested parties at 4:00
P.M. (a press conference
is held at 4:00 P.M) on the release day.
·
The
reference data are also available on the website:
http://eng.stat.gov.tw/lp.asp?ctNode=2410&CtUnit=1016&BaseDSD=7
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Integrity
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Dissemination of terms and conditions under which official statistics
are produced, including ...
Confidentiality of individual responses
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0.1.1 Responsibility for collecting,
processing, and disseminating statistics
- All statistics collected,
compiled and published by the DGBAS are governed by the Statistics Act
and the Enforcement Rules.
- The
data on the price indices are disseminated by the DGBAS as a service
to the public.
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Identification of internal government access to
data before release
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1.2.2 Internal governmental access to
statistics prior to release
The
information published in the press release and advance copies of the CPI
news release are provided to the President, the Premier, the Vice Premier
and the Governor of Central Bank of the R.O.C before official release.
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Identification of ministerial commentary on the
occasion of statistical releases
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1.2.3
Attribution of statistical products
No
ministerial commentary is released with these data. Bureau of
Statistics, DGBAS, Executive Yuan provides its own
analytical commentary with these data releases.
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Provision of information about revision and
advance notice of major changes in methodology
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4.3.1 Revision schedule
- All
seasonally adjusted and unadjusted CPIs are routinely subject to
revision for up to 3 months after
original publication. Indices are revised to reflect late
reports and corrections received from respondents. A final estimate
will be issued in 3 months after initial publication.
Besides, the seasonally adjusted monthly data for the previous 5 years
are revised at the time of the release
of the April CPI.
- Major
program changes are made on CPI re-basing every 5 years. The weights will be updated
annually from 2018. As soon as
the re-basing process is finished, the new results will be announced in
the upcoming February with data of January.
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Quality
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Dissemination of documentation on methodology
and sources used in preparing statistics
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5.2.1 Dissemination of documentation on concepts,
scope, classifications, basis of recording, data sources, and statistical
techniques
Detailed
methodological document can be
obtained on the website
http://eng.stat.gov.tw/public/data/dgbas03/bs3/book/descriptione.pdf
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Dissemination of that support statistical
cross-checks and provide assurance of reasonableness
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4.2.1 Temporal consistency
The“Price
Index”
news release publishes a monthly analysis of price movements and summary tables on the CPI.
The
e-book “Price Statistics Monthly” is made available immediately at the time
of release, disseminates detailed monthly data :
(1) basic groups; (2) commodity and service groups; (3) frequency of purchase
groups; (4) other special groups; (5) time series of CPI.
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