Turnover Indices in „Accommodation and food service activities”
National Statistical Institute
|Contact organisation unit|
'Shotr-term business statistics and Transport statistics' Department
|Contact person function|
|Contact mail address|
2, P. Volov Str.; 1038 Sofia, Bulgaria
|Contact email address|
|Contact phone number|
+359 2 9857 128
|Contact fax number|
|Metadata last certified||16 July 2021|
|Metadata last posted||16 July 2021|
|Metadata last update||16 July 2021|
The index of turnover is a key indicator for assessing the current state and short-term trends in the development of the section 'Accommodation and food service activities'. The index follows the dynamics in the supply and demand of accommodation and food services, also records the influence of the ongoing economic processes in the country.
Quarterly turnover index measures changes in the turnover of enterprises section 'Accommodation and food service activities'. This
Classification of Economic Activities (for international use NACE.BG-2008)
Section I 'Accommodation and food service activities' under NACE.BG-2008. The indices are calculated by divisions (a two-digit NACE.BG-2008) and sector.
|Statistical concepts and definitions|
The turnover includes net revenues from sales of products, goods and services survey units(excluding VAT and other deductible taxes), and revenue from raw materials sold.
A enterprise in section 'Accommodation and food service activities'.
The population of firms in section I 'Accommodation and food service activities' includes about 28 000 units, which are form sampling population of approximately 21 000 enterprises with an annual turnover exceeding over 10 thousand BGN. Of these observed a sample of about 2 000 enterprises, which form approximately 60% of the turnover of the section.
At national level: The indices are calculated and published total for the
The indices are published as time series from the first quarter of 2000 to the last reported quarter of the current reporting year.
The indices are calculated and published at 2015 as a base year.
|Unit of measure|
Per cent (%)
|Legal acts and other agreements|
The indicators are transmitted to Eurostat at the same time with their national publication.
|Confidentiality - policy|
Regulation (EC) №223/2009 on European statistics (article 20, paragraph 4) of March 11, 2009, stipulates establishing common principles and guidelines to ensure the confidentiality of data used for the production of European statistics and the access to those confidential
|Confidentiality - data treatment|
Individual data, data which could be indirectly identified, as well as aggregations of less than three statistical units and/or when the relative share of one parameter is more than 85% of the total volume of this parameter for all population units. Data which according to the Law on Statistics are confidential not published.
At the national level - according to the terms set out in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute. The turnover indices are published about 50-55 days after the end of the reference quarter.
|Release calendar access|
The calendar is available on the NSI website: https://www.nsi.bg/en/node/480
Data are published on the NSI website, section Business statistics in accordance with the Law on Statistics and the European Statistics Code of Practice respecting the professional independence and aimed at objectivity, transparency and equal treatment of all consumers.
|Frequency of dissemination|
|Accessibility and clarity|
The indices are not presented in publications.
Data on section I 'Accommodation and food service activities' are available to all users of the NSI website under the heading Business statistics - Short-term Business Statistics - Quarterly data - Turnover Indices in Services:
and online sistem INFOSTAT:
Micro data are neither distributed nor provided to the users.
|Documentation on methodology|
Regulation (EC) №1165/98 and Regulation (EC) №1158/2005 on Short-term statistics required by the European Commission (Eurostat) regularly (every three years) to report to the European Parliament on the applicability of short-term data, their quality and revisions of the data. In March 2004 was launched a project to capture the quality of short-term indicators. Every year Member States should present to Eurostat detailed
The legal framework that regulates the production of short-term business statistics indicators states that statistics collected within the EU system must be of satisfactory quality and this quality and administrative burden that comes from what must be comparable across Member States. These criteria have been drawn up to ensure that these requirements are met, and that is reflected in the quality reports of the individual short-term indicators.
The quality of the short-term variables is measured by each
User reviews are collected by:
All levels of detail that are required by the Regulations concerning STS is calculated and published.
|Accuracy and reliability|
The total population in section I 'Accommodation and food service activities' includes about 28 000 units, which form a sampling population of approximately 21 000 enterprises with an annual turnover exceeding 10 thousand BGN. Of these monthly observed sample about 2 000 units, which form approximately 60% of the turnover.
The main source of errors is the measurement errors which arise at the data collection stage for variety of reasons, for example respondents misunderstanding what
Shall be made efforts to avoid these errors by providing assistance to the reporting units, improv the instructions attached to the questionnaire, assist the statisticians in Regional statistical offices. Most of measurement errors are detected and corrected through the logical and arithmetical controls of the Information system 'Short-term statistics' (Online Information system for data collection, editing and processing of the STS
The specific sampling method is 'Stratified Random Sample' in which the first enterprises stratify by section (2-digit numeric code NACE.BG 2008) and then in each section by turnover. Each section has three stratums: 1-complete, 2, 3-sampling. Coefficient of variation is used as an indicator on precision. It is computed as a percentage. Coefficient of variation for fourth quarter 2020:
Non-responders companies are valued according to the stratum in which they are faced. In stratum comprehensive assessment is done individually for each company using available information on trends in the establishment and adjusted trends in reported units on the same stratum and section. Sampling strata for each section evaluates non-responders using extrapolation coefficients calculated from data reported by enterprises in stratum corresponding section after elimination of extreme values. In these cases it is assumed that there are no significant differences in the behavior of responders and non-responders enterprises. The response rate for the fourth quarter of 2020 is 82% in terms of the number of enterprises and 90% in terms of turnover. Actions to reduce non-sampling errors: sending informative reminders and phone calls to collect data.
|Timeliness and punctuality|
NSI provides information on turnover index from 50 to 55 days after the end of reporting quarter.
Turnover indices present ontime, according to the terms in the Release Calendar presenting the results of the statistical surveys carried out by the National Statistical Institute.
|Coherence and comparability|
|Comparability - geographical|
The turnover indices are representative for the whole country, they are not representative for the regions of the country. To calculate the indices of turnover NSI applies a methodology in accordance with international standards. In this sense, the comparability of the indicators across countries can be considered as very good.
|Comparability - over time|
The quarterly indices are presented as time series from the first quarter of 2000 to the last reported quarter. In accordance with Regulation (EC) №472/2008 of January 2009 in the STS was introduced a new version of the Classification of Economic Activities (NACE.BG 2008). The data for all quarters back to 2000, were recalculates according to the new Classification (NACE.BG 2008) and published in the NSI website. For conversion of data rows was applied ‘macro’ method. The indices at the old classification (NACE.BG-2003) are recalculated according to the new classification (NACE.BG 2008) using transition coefficients, which are calculated from transition matrixes, based on micro data.
Regulation (EC) №1165/98 requires 'Every five years, Member States shall rebase the indices using as base years ending with a 0 or a 5. All indices must be rebased on the new base year within three years after the end of the new base year'. In compliance with these requirements since January 2018 the base year for Short-term business statistics has been changed. All short-term indicators presented in the form of index are calculated and published at 2015 as a base year. The time series has beeen recalculated according to the new base year and are posted on the website of NSI.
|Coherence - cross domain|
The turnover indices are compared with the turnover indices calculated based on data from the annual survey on Structural Business Statistics. The differences are due to different coverage. SBS survey is conducted exhaustively and all enterprises are legally obliged to submit their Annual Reports to the National Statistical Institute. The STS surveys are sampling surveys. Sampling population includes companies with a turnover of over 10 thousand BGN. SBS is the source of turnover for calculation (reconciled) STS indicators.
|Coherence - internal|
|Cost and burden|
Actions to reduce costs and the burden on respondents: stratified sampling and data submitted online through Information system ’Short-term statistics’.
|Data revision - policy|
The indices of turnover in hotels and restaurants are reconciled on the basis of comprehensive annual data from SBS.
|Data revision - practice|
The revised data are published on the NSI site, system INFOSTAT and transmitted to Eurostat.
The QPI MR and MAR are calculated from the year-on-year growth rates for calendar adjusted data for period 2016 - 2020. The indices which used for 2016 and 2017 are at base=2010 and 2018, 2019, 2020 are at base=2015.
The indices are based on quarterly survey ’Activity of non-financial enterprises’. The sample includes about 2 000 enterprises which account for about 60% of the turnover of firms in the target population and is representative of all divisions defined in Regulation (EU) 1893/2006. In calculating the turnover index includes all receipts from sales (including revenues from sales of raw materials).
|Frequency of data collection|
Data collection is done online (IS STS), by mail and by phone.
To reduce non-response IS STS has functionality to send an informative and a reminder letters to respondents:
Validation of data in the report:
When recording the data, the system carries out obligatory and recommended controls according to set with validation rules.
The system carries out the statutory and warning controls. In case there are errors, it displays a warning dialog error in the report. The system does not allow completion of the report until they have corrected these errors by statutory controls.
Validation of the output data:
Output data is verified at section level with regard to the previous quarter, the same quarter of the previous year and also with regard to extreme values, if necessary data is validated at the level of statistical units.
The turnover indices are calculated for both sections: ‘Accommodation’ and ‘Food service activities’. Price effects are eliminated by the use of deflators based on average prices of the base year (2015).
The software used for seasonal and working day adjustment is JDEMETRA2.2.0 (TRAMO-SEATS).
First data rows are tested for calendar effects, which usually includes:
Revisions to seasonally adjusted data are published in accordance with accepted revision policy and release calendar that is aligned with the revision policy and the revision calendar for the unadjusted data.
- Seasonally unadjusted
- Seasonally adjusted
- Working day adjusted