|
For any question on data and metadata, please contact: Eurostat user support |
|
|||
1.1. Contact organisation | Turkish Statistical Institute (TURKSTAT) |
||
1.2. Contact organisation unit | Short Term Statistics Department |
||
1.5. Contact mail address | Turkish Statistical Institute (TURKSTAT) Necatibey Cad. No:114 Çankaya/ANKARA |
|
|||
2.1. Metadata last certified | 22/08/2022 | ||
2.2. Metadata last posted | 22/08/2022 | ||
2.3. Metadata last update | 22/08/2022 |
|
|||
3.1. Data description | |||
Construction Cost Index (CCI): Price index that measures of the changes in construction costs in terms of labor and materials by months |
|||
3.2. Classification system | |||
The Statistical Classification of Products by Activity (CPA Version 2.1) is used for CCI. |
|||
3.3. Coverage - sector | |||
F. Construction 41 Buildings 41.00.1 Residential building 41.00.2 Non residential buildings 42 Civil Engineering 42.1 Roads and railways 42.2 Utility projects 42.9 Other civil engireering projects |
|||
3.4. Statistical concepts and definitions | |||
Substance weights used in the calculation of the construction cost index for the 2015 base year are calculated by using the input amounts determined by analyzing the approximate cost and final account files of the construction projects obtained from various public institutions and organizations and the unit prices of the year 2015. |
|||
3.5. Statistical unit | |||
Observation unit: Price indices and administrative data Reporting unit: Index and changes of monthly and yearly |
|||
3.6. Statistical population | |||
In the calculation of the new series with 2015 = 100 base year and current weight structure, Domestic Producer Price Index, Consumer Price Index and Social Security Institution administrative data are used in the bottom detail. |
|||
3.7. Reference area | |||
Turkey |
|||
3.8. Coverage - Time | |||
1991=100 based Bulding Construction Cost Index was first used in November, 1992. 2005=100 based Bulding Construction Cost Index was first used in April, 2007. 2015=100 based Construction Cost Index was first released in March,2018. |
|||
3.9. Base period | |||
2015=100 |
|
|||
Indices and percentage changes. |
|
|||
Reference period is monthly. |
|
|||
6.1. Institutional Mandate - legal acts and other agreements | |||
Turkish Official Statistics Law No 5429 was accepted on 10 November 2005, is the legal base of all our statistics. COUNCIL REGULATION (EC) No 1165/98 of 19 May 1998 concerning short-term statistics. |
|||
6.2. Institutional Mandate - data sharing | |||
Data are transmitted to Eurostat only. (for residential buildings construction cost index) |
|
|||
7.1. Confidentiality - policy | |||
All statistics collected and published by TURKSTAT are governed by the Turkish Statistical Law no. 5429, of 10 November 2005. |
|||
7.2. Confidentiality - data treatment | |||
Weights of prices of items are confidential. |
|
|||
8.1. Release calendar | |||
At the end of each year TURKSTAT publishes a release calendar providing the release dates for the coming year. This is also disseminated on TURKSTAT’s internet website (www.turkstat.gov.tr). |
|||
8.2. Release calendar access | |||
8.3. Release policy - user access | |||
The news releases are made available on the Turkish Statistical Institute (TURKSTAT) website http://www.turkstat.gov.tr/ There is no access to the data before the release. |
|
|||
Monthly |
|
|||
10.1. Dissemination format - News release | |||
No ministerial commentary is attached to the release of data by the statistics office .Under the Statistical Law, any data product prepared under that law must be identified. Technical commentaries prepared by TURKSTAT accompany the press release., http://www.turkstat.gov.tr/PreHaberBultenleri.do?id=27743 is the link for the press release. |
|||
10.2. Dissemination format - Publications | |||
Name of national paper and electronic publications: Construction Cost Index |
|||
10.3. Dissemination format - online database | |||
Online database is available. You can access from https://biruni.tuik.gov.tr/medas/?kn=143&locale=en |
|||
10.4. Dissemination format - microdata access | |||
Not available. |
|||
10.5. Dissemination format - other | |||
None. |
|||
10.6. Documentation on methodology | |||
Methodology and sources used in statistical compilation are disseminated on the Turkish Statistical Institute (TURKSTAT) website (http://www.turkstat.gov.tr/). |
|||
10.7. Quality management - documentation | |||
Not available. |
|
|||
11.1. Quality assurance | |||
The quality of statistical information and its production process is ensured by the provisions of the European Statistics Code of Practice. |
|||
11.2. Quality management - assessment | |||
The quality of the data corresponds requirements of accuracy, timeliness and punctuality, comparability and compatibility, statistical reports used to collect statistical data were tested. |
|
|||
12.1. Relevance - User Needs | |||
The main users of statistical information are Eurostat, state institutions and agencies, international organisations, the media, business and research communities, students, whose needs are satisfied without a breach of the confidentiality principle. |
|||
12.2. Relevance - User Satisfaction | |||
Not available. |
|||
12.3. Completeness | |||
The index is broken down into three groups of costs: Labour, Materials, Total The index is released in 8 division in accordance with CPA 2.1:
Eurostat's requirements in term of time series are fulfilled. Moreover, CCI actually meets the Turkish users needs of information |
|
|||
13.1. Accuracy - overall | |||
Received CCI (Construction Cost Index) results are analyzed, looking for errors, which may affect the final results. Outliers are determined by using SAS programme, and some computings are made by using excel and SAS together. Price indices and administrative data provide quality checked data for CCI. |
|||
13.2. Sampling error | |||
CCI are derived from D-PPI, CPI and administrative data. The size of statistical error is not calculated. |
|||
13.3. Non-sampling error | |||
The non-sampling error is not calculated. |
|
|||
14.1. Timeliness | |||
Publication is released 51-53 days after the end of the reference month. |
|||
14.2. Punctuality | |||
The news releases are published according to the announced release calendar. |
|
|||
15.1. Comparability - geographical | |||
Turkey CCI is produced only on the whole country level. |
|||
15.2. Comparability - over time | |||
TurkStat calculates CCI since 2018. Time series of BCCI breaks are he following:
|
|||
15.3. Coherence - cross domain | |||
Coherence is insured for Labour cost since data derived by the administrative data from Social Security Institution; materials costs are collected by PPI and CPI. |
|||
15.4. Coherence - internal | |||
CCI is internaly coherent. Lower level price indices are aggregated to the higher level indices and the total CCI. |
|
|||
There is no responder burden. In calculating process, current price indices and administrative data are used. |
|
|||
17.1. Data revision - policy | |||
Data are not subject to revision. |
|||
17.2. Data revision - practice | |||
Not avaliable |
|
|||
18.1. Source data | |||
Type of source Different types of sources are used. Material prices are mainly colleçted from Domestic Producer Price Index and Consumer Price Index. Labour costs are derived from administrative source: Social Security Institution Frame on which the source is based Weights for types of construction and items used in compilation of 2015 based CCI were calculated evaluating bill of quantities obtained from various public institutions and organizations(eg.Housing Development Administration, The General Directorate of Highways) with 2015 unit prices. Criteria for stratification Not applicable Threshold values and percentages Not available Frequency of updating the sample Sample is updated every 5 years. |
|||
18.2. Frequency of data collection | |||
Data are collected monthly. |
|||
18.3. Data collection | |||
Questionnaires are not used in the survey. In the calculation of the new series with 2015 = 100 base year, Domestic Producer Price Index, Consumer Price Index and Social Security Institution data are used. |
|||
18.4. Data validation | |||
The experts of the CCI carries out the first verification and editing as well as validation of the data using the SAS programme. Data are compared to the data of previous periods. Reasons of changes in the prices of cost items are analysed. Before computing the index, data are quality-checked by observing both levels and rates of change. |
|||
18.5. Data compilation | |||
The CCI is computed by applying Laspeyres formula with fixed base year (2015=100). It is not a chained index. |
|||
18.6. Adjustment | |||
Not available |
|
|||
None. |
|
|||
|
|||