Czech Statistical Office

Prices Statistics Department

Petra Hochová

Na padesátém 81

100 82, Praha 10

Czech Republic

CSTO:

The construction producers prices index, abbreviated CPPI (belongs to a group PPI - it means producer price index / variable 130201 producer prices in short term bussines statistics on producer prices).

The construction producers prices index is compiled from the price indices of constructions, those are put together from quarterly price indices of construction works. Prices of construction works are surveyed.

The price indices of constructions are put together from quarterly price indices of construction works. A reporting network established by purposive embraced about 600 respondents of all size classes and different legal forms. The prices in the survey are in agreement between the supplier and consumer for a unit of a domestic construction work, which is realized by employees of the company, working owners of the company, contract job workers and cooperating self reporting units all over the territory of Czech Republic. The construction works prices from the second month of the particular quarter those are surveyed - are exclusive of VAT and are exclusive of cost of building site accessories.

CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities (it means output price index of constructions in the classification CC: items CC 111 One-dwelling buildings and CC 112 Two- and more dwelling buildings). It is weighted average of selected price indices of construction works (sorted by the czech nomenclatures TSKPstat), those are compiled from the surveyed prices - with the use of geometric mean.

CSTI:

The construction cost index, abbreviated as CCI, is a business cycle indicator showing the trend in the costs incurred by the contractor in the construction process. The construction cost index covers influences of materials, labour, plant and equipment, transport, energy and other costs (excluding architect's fees).

Construction costs: The objective of the index is that it is used to determine the cost change of a new construction production over a certain period of time. Construction costs index is calculated with the use of this indices: industrial producer price, inland freight transport, forestry and labour costs. Measure unit is a percentage and an index. The source is administrative data - a secondary product of other surveys: chosen industrial producer price indices associated with construction works, price indices of forestry, price indices of inland freight transport, indices of labour costs in construction and indices of outgoings.

CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities (it means index of construction costs in the classification CC: items CC 111 One-dwelling buildings and CC 112 Two- and more dwelling buildings).

NACE Rev. 2.; NACE section F,

CPA version 2.1; CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities, 

CC 111 One-dwelling buildings and CC 112 Two- and more dwelling buildings.

CSTO:

Producer prices in construction: NACE Rev. 2 divisions 25, 28, 33, 41 (except group 41.1), 42, 43, 80.

CSTI:

Construction costs consist of:

• Industrial producer price indices: CPA 2008 (B 08,C 10-31,D 35,E 36),
• Price indices of inland Freight transport: CPA 2008 (H 49, 50),
• Price indices of Forestry: CPA 2008 (A 02),
• Labour costs in construction: ISCO 71, 72, 81, 83, 93 for NACE Rev.2 (section F: 41, 42, 43).

Definitions meet the requirements of Commission Implementing Regulation (EU) 2020/1197.

No planned changes.

CSTO:

List and definition of the main variables in the survey:

• exercise price in CZK,
• region of work realization,
• new conditions,
• exercise price with a new condition in CZK for previous quarter.

The prices in the survey are in agreement between the supplier and consumer for a unit of a domestic construction work, which is realized by employees of the company, working owners of the company, contract job workers and cooperating self reporting units all over the territory of Czech Republic. The construction works prices from the second month of the particular quarter are surveyed - are exclusive of VAT and are exclusive of cost of building site accessories. 

Accounting conventions: length of the reference period is a quarter. The second month of the observational quarter is surveyed.

CSTI:

Administrative data - a secondary product of other surveys:

• 4-digit of chosen Industrial producer price indices associated with construction work. 
• Price indices of inland Freight transport (included in Market services in the Business Sphere price indices).
• Price indices of Forestry – price indices of wood used in construction works.
• Labour costs in construction - hourly rate of auxiliary construction works.
• Outgoings are estimated and extrapolated by values used in the past time.

Note: survey frame of entering data is statistical form – chiefly Ceny Prum 1-12 for Industrial producer price indices, Ceny Dop S 1-12 and Ceny Dop Ž 1-12 for price indices of inland Freight transport, Ceny Les 1-04 for price indices of Forestry and Ceny Stav 1-04 for index of Labour costs.

CSTO:

Statistical unit is a price of construction work. The price consists of material -, labour -, plant and equipment -, transport -, energy - and other costs, moreover it consists of productivity and profit margins.

The prices in the survey are in agreement between the supplier and consumer for a unit of a domestic construction work, which is realized by employees of the company, working owners of the company, contract job workers and cooperating self reporting units all over the territory of the Czech Republic. Construction work prices are surveyed the second month of the observation quarter, and are exclusive of VAT, site preparation costs and architect's fee.

CSTI:

Cost tracking uses the results of several sample surveys based on tracking price trends over time. A reporting unit and an observation unit is an enterprise.

CSTO:

Enterprises those carry out construction work with own workers or working owners of the company, contract job workers and cooperating self reporting units. NACE 25, 28, 33, 41, 42, 43, 80.

Reporting unit corresponds with observation unit. There are 600 observation units and 8,000 representatives for the quarterly survey of the whole price statistic of construction output in the Czech Republic - specific information for the index of construction price index of CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities is not available.

CSTI:

Construction costs indices are put together from the administrative data - we are not able to say how many statistical units contribute to a computation of the cost indices.

A survey frame of entering data is based on the statistical sample survey – chiefly Ceny Prum 1-12 for Industrial producer price indices (1,160 observation units; 4,900 representatives. It is not possible to say, how many respondents or representatives belong to chosen price indices.), Ceny Dop S 1-12 and Ceny Dop Ž 1-12 for price indices of inland Freight transport (under 100 observation units and 200 representatives; It is not possible to say, how many respondents or representatives belong to chosen price indices), Ceny Les 1-04 for price indices of Forestry (under 100 observation units and 200 representatives; It is not possible to say, how many respondents or representatives belong to chosen price indices.) and Ceny Stav 1-04 for index of Labour costs (100 observation units and 220 representatives for hourly rate of auxiliary construction works).

The whole Czech Republic.

CSTO:

2004 (classification change to CC); data was recalculated down to year 2000 in 2008 and was recalculated in 2018 to the base period of 2015 average = 100. Finally, all the data in 2024 were recalculated to the base period of the 2021 average = 100 down to year 2000.

CSTI:

Construction costs: Index of Construction costs is released from 2004 and indices were calculated down to the year 2000 in 2008 and was recalculated in 2018 to the base period of 2015 average = 100. Finally, all the data in 2024 were recalculated to the base period of the 2021 average = 100 down to year 2000.

2021 average.

Index.

Quarterly routine.

Obligation on units to provide data: reporting units (respondents = enterprises) are obligated to provide data by the law.

Statistical surveys carried out by the Czech Statistical Office are governed by terms of the State Statistical Service Act. No. 89/1995 Coll. This act defines the independence of the CZSO and its rights and duties towards reporting units. Data protection is also guaranteed by the law.

They are not planned changes.

Without data sharing.

The confidential data is not published and is not provided to the public.

Treatment of confidential data: it is based on observation of more than 3 enterprises for statistical information. (None of enterprise has more than 85% influence on a result of calculation). In case of non-fulfilment of given condition, it is necessary to publish higher level of an aggregation.

They are disseminated aggregated indices in price statistics of construction works - the treatment of confidential data is solved.

Data are only transmitted to Eurostat but not disseminated nationally.

CSTO:

The index of CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities is not released nationally. The indices for its components CC 1110, CC 1121 and CC 1122 are released every quarter.
See Catalogue of Products in annexe.

(name of products: Price indices of constructions according to CC only four-figure division (2015 average=100) - Q. quarter of 20YY; Price indices of Construction works, price indices of Constructions and indices of Construction costs - quarterly time series - Q. quarter of 20YY.)

CSTI:

Index of Construction costs of residential buildings CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities is not released nationally.
Index of Construction costs of residential buildings (CC 11 Residential buildings - includes CC 113 Residences for communities) is released in Time series every quarter; in Data sets there is released yearlong data in February of the next year.
See Catalogue of products in annexes.

See Catalogue of products in the annexe below.

CSTO:

Producer prices in construction index of residential buildings (CC 11 Residential buildings - includes CC 113 Residences for communities) is released in the quarterly publication Price indices of Construction works, price indices of Constructions and indices of Construction costs.

CSTI:

Construction costs index of residential buildings (CC 11 Residential buildings - includes CC 113 Residences for communities) is released in the quarterly publication Price indices of Construction works, price indices of Constructions and indices of Construction costs.

No one has a prior access to the indices of CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities. No one has an access to the data before release.

The data is transmitted to Eurostat coded as Dataset : BCS_PPC_Q / CPA_F41001X410014.

CSTO:

Producer prices in construction index of residential buildings (CC 11 Residential buildings - includes CC 113 Residences for communities) is released in the quarterly publication Price indices of Construction works, price indices of Constructions and indices of Construction costs.

CSTI:

Construction costs index of residential buildings (CC 11 Residential buildings - includes CC 113 Residences for communities) is released in the quarterly publication Price indices of Construction works, price indices of Constructions and indices of Construction costs.

Quarterly.

No ministerial commentary. No News release.

The name of national electronic dissemination: Price indices of Construction works, price indices of Constructions and indices of Construction costs.
The code of publication is 011041; version: Czech - English; it is free on the CZSO websites.

CSTO:

Producer prices in construction index of residential buildings (CC 11 Residential buildings - including CC 113 Residences for communities) is released in the table No. 2 Price indices of Constructions by CC classification.
Data is presented as a price index; 2015 average = 100; at the 3-digit CC level; quarterly. It is released in this format from May 2018.

CSTI:

Costs index of residential buildings (CC 11 Residential buildings - including CC 113 Residences for communities) is released in the table No. 4 Indices of Construction costs of Construction output by Kinds of Constructions Nomenclature.
Data is presented as a cost index; 2015 average = 100; item Kinds of Construction Nomenclature 010 Residential buildings; quarterly. It is released in this format from May 2018.

There is an online database for construction prices statistics on the CZSO websites.

There is no microdata access.

CSTO:

The output price index in construction in national currency - CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities is transmitted to Eurostat coded as Dataset: BCS_PPC_Q / CSTO PRODUCT: CPA_F41001X410014; ACTIVITY: _Z.

CSTI:

The construction costs index in national currency - CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities is transmitted to Eurostat coded as Dataset : BCS_PPC_Q / CSTI PRODUCT: CPA_F41001X410014; ACTIVITY: _Z.

Methodical notes are released in the quarterly publication 011041 - Price indices of Construction works, price indices of Constructions and indices of Construction costs. See link below.
version: Czech - English, it is free on the CZSO website.

There are not available any specific documents of the quality of construction costs and prices. See general documents in the annexe.

See annexes - key documents of the CZSO.

Compliance with these principles is being ensured by a set of processes, procedures, and instruments, including appropriate organisational structures, system of instructions, and methods of allocation of human and financial resources of the CZSO.

The data user is Eurostat. Requirements of Eurostat in terms of time series are fulfilled. All deadlines of Eurostat and national CZSO are respected every quarter. Definitions of the data meet the requirements of CR No 2020/1197. The whole national territory is equally covered.

CSTO:

No sampling estimates are carried out. There is not random sample in the survey - enterprises and representatives are chosen purposefully.

The trend of the price index of residential buildings (excludes CC 113) is broadly comparable with the trend of price index of residential buildings (includes CC 113).

CSTI:

The trend of index of Construction costs of residential buildings CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities contains trend of index of Material costs of residential buildings CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities and trend of Index of Labour costs of construction industry. Obviously there is a strong coherence firstly between the index of construction costs and the index of material costs and secondly between the index of construction costs and the index of labour costs.

The data user is Eurostat. Data is put together according to an assignment of the user.

Requirements of Eurostat in terms of time series are fulfilled.

Not available.

Requirements of Eurostat in terms of time series are fulfilled.

CSTO:

Overall accurancy is good. Basical indices (those are components of compilation) are in very good quality. Price information from sample survey is checked by the special central office staff. Extreme price deviations are sorted out with the help of software. There is no automatic rejection; all suspicious data are re-checked by the office workers.

Commonly they are conducted consultations with experts on prices in construction output for updating of sample survey Ceny Stav 1-04.

• The sampling error is large during the selection of statistical units into the sample. It is difficult to distinguish whether the company actually carries out construction works or whether the company only arranges construction works. We can determine it after we contact the company. Of course, a problem comes up with the companies, those are included in the sample and are in liquidation. Otherwise the sampling error in the data is negligible.
• The non-sampling error in the data is negligible - a reporting network established by purposive embraced about 600 respondents of all size classes and different legal forms - we strive for sufficient coverage of the construction output of the Czech Republic.
  
• The first estimates are not biased - first estimates are made monthly just for constructions in total, buildings and civil engineering works.
  

The most significant sources of errors are: non-response and sampling errors. These problems are solved personally during the first level of processing the data.

CSTI:

Depends on the underlying component indices. Overall accurancy is good. The underlying component indices which are used are in very good quality. Price information from sample surveys is checked by the special central office staff. Extreme price deviations are sorted out with the help of software. There is no automatic rejection; all suspicious data are re-checked by the office workers.

CSTO:

• Coverage errors: the sampling error is large during the selection of statistical units into the sample. It is difficult to distinguish whether a company actually carries out construction works or whether a company only arranges construction works. We can determine it after we contact the company. Of course, a problem comes up with the companies, those are included in the sample and are in liquidation. Otherwise the sampling error in the data is negligible. Potential problems are solved by CZSO workers personally. The use of the Statistical Business Register is not functional. It is a list of respopndents belong a statistical survey Stav 1-12 (statistics of construction production) available.
  
• Data collection and access errors: CZSO workers have an access to the view of the respondent's data in a database, so they are able to help respondent correct his mistakes. CZSO workers have no access to the survey instrument of the CZSO (web-application named DanteWEB). Expected access errors of the application are announced in advance. There are CZSO specialists for solving problems with unexpected access errors.
  
• Unit non-response: non-response is less then 1% of surveyed enterprises. We have the opportunity to impose a fine up to CZK 100,000 on non-responding enterprises. This is guaranteed by the law No. 89/1995 Coll.
  
• Item non-response for the key variables: the data of the construction price statistics is on average compilated from 8,664 processed forms from survey sample Ceny Stav 1-04 sent by 600 respondents in every quarter of the year. 8,664 prices in the quarter cover the computation all of the key variables.
• Modelling errors: there are no specific models used in estimation.

CSTI:

• Depends on the underlying component indices. Not available.

CSTO:

Response rate: the first indicator is compiled every month after a calendar quarter. The final indicator is compiled less then one week after that. 90-100% response rate is normally achieved during the third month of the reference quarter or the following month. Final indicator is compiled when the response rate reaches 100%. It happens normally at the end of January, April, July and October. Usually the final indicator is calculated about the 10th calendar day of February, May, August and November.

Actions to speed up or increase the rate of response: a notice of opening the survey for a quarter is sent to the reporting unit during the 1st month of the observation quarter. On the 15th calendar day of the 3rd month of the observation quarter is the deadline for replies. The respondent has the opportunity to communicate via a web application, by telephone, e-mail and by mail.

CZSO workers oversee the received data and contact respondents when an error occurs.

Solving of the nonresponse error: the unit is sent a request to start of reporting prices to its data box. The company is obliged to monitor its data box, so if it does not respond, we can use a law process with a fine. But cases do not go that far. We have the opportunity to impose a fine up to CZK 100,000 on non-responding enterprises. This is guaranteed by the law No. 89/1995 Coll.

The response rate is 100%. There are 600 respondents in average.

The following principles of non-response are applied to the surveyes from which we get input data:

Response rate: the first indicator is compiled every month after a calendar quarter. The final indicator is compiled less then one week after that. 90-100% response rate is normally achieved during the third month of the reference quarter or the following month. Final indicator is compiled when the response rate reaches 100%. It happens normally at the end of January, April, July and October. Usually the final indicator is calculated about the 10th calendar day of February, May, August and November.

Actions to speed up or increase the rate of response: a notice of opening the survey for a quarter is sent to the reporting unit during the 1st month of the observation quarter. On the 15th calendar day of the 3rd month of the observation quarter is the deadline for replies. The respondent has the opportunity to communicate via a web application, by telephone, e-mail and by mail.

CZSO workers oversee the received data and contact respondents when an error occurs.

Solving of the nonresponse error: the unit is sent a request to start of reporting prices to its data box. The company is obliged to monitor its data box, so if it does not respond, we can use a law process with a fine. But cases do not go that far. We have the opportunity to impose a fine up to CZK 100,000 on non-responding enterprises. This is guaranteed by the law No. 89/1995 Coll.

The response rate is 100%. There are not estimates in calculations.

CSTI:

Construction costs indices are put together from the administrative data - the response rate is 100%. Without its own statistical survey there is no occassion for solving of the nonresponse error.

There are not estimates in calculation of the final index and carrying of data collection is not performed. The final indicator is calculated about the 5th calendar day of February, May, August, and November. The data is published nationally and provided to Eurostat at the same time.

The data is released on the 46th calendar days after the end of reference quarter.

CSTO:

Timetable of data collection: a notice of opening the survey for a quarter is sent to reporting unit during the 1st month of the observation quarter. The deadline for reply is on the 15th calendar day of the 3rd month of the observation quarter. The sample survey is closed at the end of the 3rd month of the observation quarter.

CSTI:

Construction costs: we have the use of administrative data on 36th day after the end of reference quarter.

There is not necessary to meet the deadline in hours for construction prices statistics - we have the exact days only.

All deadlines of Eurostat and national CZSO are respected every quarter.

There is not a geographical comparability at disposal. The whole national territory is equally covered.

Definitions of output price indices meet the requirements of CIR No 2020/1197.

Definitions of cost indices meet the requirements of CIR No 2020/1197.

The time series were retrospectively recalculated to the base period of 2021 average = 100 in 2024 and were recalculated down the year 2000. There are not breaks in the time series.

CSTO:

Producer prices in construction are not confronted with other sources.

CSTI:

The data is not confronted with other results.

CSTO:

CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities (It means Output price index of constructions in the classification CC) is broadly comparable with the trend of price index of residential buildings (includes CC 113 Residences for communities).

CSTI:

The trend of index of Construction costs of residential buildings CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities contains trend of index of Material costs of residential buildings CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities and trend of Index of Labour costs of construction industry. Obviously there is a strong coherence firstly between the index of construction costs and the index of material costs and secondly between the index of construction costs and the index of labour costs.

CSTO:

Burden (respondents - hours per year): 2,400

Cost (NSI - hours per year in 2023): 4,032

CSTI:

Burden (respondents - hours per year): It is a secondary product of other surveys - we are not able to separate it.

Cost (NSI - hours per year in 2023): 16

Indices are final with the first publication. The initially released values normaly do not change. There are fundamental revisions of price and cost indices and their weighting system with the use of chain-linking method and one-quarter overlap - nearly every 5 years.
The revision policy applied to data released nationally and transmitted to Eurostat is the same. The major revision policy applied to data released nationally is applied also for transmissions to Eurostat. Routine and non-scheduled revisions we do not apply to this
statistics.
For more information see annexes below.

Major Revision of construction price statistics is made nearly periodicaly. It means update of weighting scheme, update of representatives, update of classifications. Some of time series end and some new time series are generated. With the use of a chain-linking method of revision there are not recalculated the data published in the past. The new results are calculated from the new point of view and have it’s origin in the new weighting scheme. The coherence with the previous time series is ensured. The data is confronted only within the construction price statistics on the CZSO. The last revision was made in 2022. Differences between base systems are not significant - it is more of an update. 

Information about revision or major changes in methodology is released on the CZSO website at the time of change. The note of forthcoming a fundamental revision is displayed on the CZSO website.

Price and costs indices that will continue to be based on the 2015 average are published nationally since 2023. The coherence with the contemporary time series is ensured.

MAR = MR = 0; quality indicators MR and MAR are not provided. There are no data estimates and their revision. When using the revision chain method, there is no possibility to calculate a numerical calculation between the original and converted indices.

More information:

Revision of construction price and costs statistics weighting scheme was made in 2022 using a chain-linking method. The weighting scheme has been put together from results of construction production between 2017 - 2021. Price and costs indices that will continue to be based on the 2015 average are published since 2023. The representative time series will not be recalculated and will continue to be published on the CZSO website.

Major revision (on a national level) of construction price statistics was made in 2017 with using chain-linking method and one-quarter overlap. Aggregations of price indices were compilated in primary time series (technical price indices) and were compiled afterwards using constants to secondary time series. Price index for Eurostat is based on the 2015 average and has been published since 2018.
Major revision of the output price index (in practice resides in actualization of chosen construction works) defines types of representatives (usually in number of 140); moreover it is compiled a new weighting scheme. (The current weighting scheme was put together from results of construction production between the years 2011 and 2016).

CSTO:

Type of source: quarterly statistical sample survey Ceny Stav 1-04.

Frame on which the source is based: every price in the surveyed questionnaire is agreed between the supplier and consumer for a unit of domestic construction work, realized by employees of the company, working owners of the company, contract job workers and cooperating self reporting units all over the territory of Czech Republic. Construction work prices are surveyed the second month of the observation quarter, and are exclusive of VAT.
Change in technology or change in material is not included in surveyed prices.

Sample: the reporting units are selected intentionally.

Criteria for stratification: areas are classified according similarly to the NUTS 4; the capital Prague is classified by 28 parts. There is a nomenclature (with the code 2125) for areas of realisation of construction work which is used for stratification - just for survey, not for dissemination.

Threshold values and percentages: 200 enterprises with less then 50 employees and 400 enterprises with more then 50 employees are selected. The list below shows the distribution (%) of the sample between the surveyed NACE Divisions.

NACE division: Share of reporting units:
NACE 25:   3%
NACE 28:   2%
NACE 33:   1%
NACE 41: 41%
NACE 42: 23%
NACE 43: 29%
NACE 80:   1%

Frequency of updating the sample: continuously.

CSTI:

Construction costs: administrative source - a secondary product of other surveys:

• 4-digit of chosen industrial producer price indices associated with construction work.  
• Price indices of inland freight transport (included in Market services in the Business Sphere price indices).
• Price indices of forestry – price indices of wood used in construction works.
• Labour costs in construction - hourly rate of auxiliary construction works.
• Outgoings are estimated and extrapolated by values used in the past time.

Note:

A survey frame of entering data is based on the statistical sample survey – chiefly Ceny Prum 1-12 for Industrial producer price indices (1160 observation units; 4900 representatives. It is not possible to say, how many respondents or representatives belong to chosen price indices.), Ceny Dop S 1-12 and Ceny Dop Ž 1-12 for price indices of inland Freight transport (under 100 observation units and 200 representatives; It is not possible to say, how many respondents or representatives belong to chosen price indices.), Ceny Les 1-04 for price indices of Forestry (under 100 observation units and 200 representatives; It is not possible to say, how many respondents or representatives belong to chosen price indices.) and Ceny Stav 1-04 for index of Labour costs (100 observation units and 220 representatives for hourly rate of auxiliary construction works).

The data user is Eurostat. Requirements of Eurostat in terms of time series are fulfilled. All deadlines of Eurostat (and the CZSO) are respected by the whole Prices Statistics Department of the CZSO.

CSTO:

Length of the reference period is a quarter. The second month of the observation quarter is surveyed.

CSTI:

Quarterly indices: price indices of forestry and price indices of construction works (hourly rate of auxiliary construction works).

Monthly indices: industrial producer price indices, price indices of inland freight transport and indices of outgoings.

Monthly indices are recalculated into quarterly indices.

CSTO:

Questionnaires used in the survey: quarterly sample survey Ceny Stav 1-04. It contains 140 representatives of construction works (it means one form for each type of construction work); moreover there are some extra conditions for specifications in a questionnaire. Each enterprise receives the questionnaires relevant for construction works those the enterprise carries out.

Data collection media:

• online (WEB) questionnaire - online reports with the use of application named Dante-WEB,
• paper questionnaire sent by postal service,
• electronic questionnaire sent by e-mail,
• telephone contact CZSO workers is possible too.

CSTI:

Administrative data is regularly obtained from the CZSO statistics. Most of administrative data is not published and is not provided to the public.

Questionnaires used in the survey: A survey frame of entering data is based on the statistical sample survey – chiefly “Ceny Prum 1-12” for Industrial producer price indices (1160 observation units; 4900 representatives. It is not possible to say, how many respondents or representatives belong to chosen price indices.), Ceny Dop S 1-12 and Ceny Dop Ž 1-12 for price indices of inland Freight transport (under 100 observation units and 200 representatives; It is not possible to say, how many respondents or representatives belong to chosen price indices.), Ceny Les 1-04 for price indices of Forestry (under 100 observation units and 200 representatives; It is not possible to say, how many respondents or representatives belong to chosen price indices.) and Ceny Stav 1-04 for index of Labour costs (100 observation units and 220 representatives for hourly rate of auxiliary construction works).

Data collection media: electronic questionnaires, e-mails, recorded delivery letters or telephones.

CSTO:

Validation level 0 (format and file structure checks): indentification of a price is checked. It means IČO (Identification number of enterprise), code of a respondent, code of a representative and order of a respondent’s price. Moreover it is necessary to get filled the whole form for the given quarter. The office workers call to respondent  if something is missing. There is no automatic rejection; all suspicious data are re-checked by the office workers.

Validation level 1 (intra-dataset checks): it is a check for comparison a price of observed quarter to a price of  previous quarter. Moreover it is checked on extreme values of the prices. Data from the sample survey is checked by the special central office staff. Extreme price deviations are sorted out with the help of software. The office workers solve potential inaccuracies with respondents personaly by phone or e-mail.

Validation level 2 (intra-domain, intra-source checks): result of output price index for CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities is checked with result of output price index for residential buildings (includes CPA 41.00.14 Residences for communities). Their trends have to be similar.

Validation level 3 (intra-domain inter-source checks): result of output price index for CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities is checked with result of construction cost index for CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities. Their trends are analysed but they do not need to be similar.

Validation level 4 (checks between two domains available in the same Institution): we do not use this type of control.

Validation level 5 (checks between the data available in the Institution and the data / information available outside the Institution): we do not use this type of control.

CSTI:

Input indices are compared to the indices of previous periods. Trends of construction costs indices are checked with trend of output price indices and changes are analysed.

Plausibility of the input indices guarantees the plausibility of the final construction costs indices. The input indices are plausible enough.

CSTO:

Estimates for non-response: Non-response is less then 1% of surveyed enterprises. We have the opportunity to impose a fine up to CZK 100,000 on non-responding enterprises. This is guaranteed by the law No. 89/1995 Coll. They are not estimates for grossing-up to population levels used in construction statistics of output prices.

Type of index: the total index of output prices of CPA 41.00.1 Residential buildings (new buildings only) excluding CPA 41.00.14 Residences for communities is put together with use of weighting average of items: CC 1110, CC 1121 and CC 1122. A basic method used for the index compilation is the Laspeyres. The index is based on a fixed base year index.

The weighting scheme for 4-digit items of CC is based on construction budgets of chosen constructions of residential buildings. The current weighting scheme for aggregation of 3-, 2- and 1-digit items of CC was put together from results of construction production between 2017-2021. Usually weighting scheme is updated every 5 years.

A fundamental revision of price indices was made in 2022 with the use of chain-linking method and one-quarter overlap. Aggregations of price indices were put together in primary time series (technical price indices) and were recalculated afterwards with using constants into secondary time series. Price indices based on the 2021 average have been provided to Eurostat since 2024. The time series were recalculated and sent to Eurostat in 2024 too.

There is a CZSO Oracle APEX aplication for data of construction price statistics first level compilation available.

CSTI:

Weighted average is used for calculation of the construction costs indices. Weighting scheme is based on budgets of chosen constructions. The current weighting scheme was put together from results of construction production between 2017-2021.

A fundamental revision of price indices was made in 2022 with the use of chain-linking method. Aggregations of indices was put together in primary time series (technical indices) and was recalculated afterwards using constants to secondary time series – aggregations of indices can not be put together in the secondary time series.  Indices based on the 2021 average have been published since 2024. The time series were recalculated and sent to Eurostat in 2024 too.

No grossing-up. Index of Outgoings from the index of Construction Costs is estimated; no other estimates.

WDA, SA and other calculations: no manipulations. Data for Eurostat is not disseminated nationally.

No additional comments.