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ANNUAL QUALITY REPORT
FOR THE SURVEY
QUARTERLY STATISTICAL SURVEY ON ELECTRONIC
COMMUNICATION SERVICES (KO-TEL/ČL)
AND
ANNUAL STATISTICAL SURVEY ON ELECTRONIC
COMMUNICATION SERVICES (KO-TEL/L)
FOR
2014
Prepared by: Nataša GOSTIŠA
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Table of Contents
0 Methodological Explanations ... 3
1 Relevance ... 5
1.1 Rate of Unavailable Statistics ... 5
2 Accuracy ... 5 2.1 Sampling Errors ... 5 2.1.1 Sampling Error ... 5 2.2 Coverage Bias ... 5 2.2.1 Coverage Bias ... 5 2.3 Non-Sampling Errors ... 5 2.3.1 Non-Response Errors ... 5
2.3.1.1 Unit Non-Response Rate ... 5
2.3.1.2 Item Non-Response Rate ... 5
2.3.1.3 Imputation Rate ... 5
2.3.2 Coverage Errors ... 5
2.3.2.1 Overcoverage Rate ... 5
2.3.3 Measurement Errors ... 6
2.3.3.1 Editing Rate ... 6
2.3.4 Rate of the Coherence of Data Sources ... 6
3 Timeliness and Punctuality ... 6
3.1 Timeliness ... 6
3.1.1 Timeliness of the First Results ... 6
3.1.2 Timeliness of Final Results ... 6
3.2 Punctuality ... 6
3.2.1 Punctuality of the First Results ... 6
4 Accessibility and Clarity ... 7
4.1 Accessibility ... 7
4.1.1 Means Used for the Dissemination ... 7
4.2 Clarity ... 7
4.2.1 Results Presented ... 7
4.2.2 Level (Detail) of Presentation... 7
5 Comparability ... 8
5.1 Comparability over Time ... 8
5.1.1 Length of Comparable Time Series ... 8
5.1.2 Breaks in Time Series ... 8
5.2 Geographical Comparability ... 8
5.2.1 Comparability with Other Members of the European Statistical System8 5.3 Seasonal Adjustment ... 8
6 Coherence ... 8
6.1 Coherence between Provisional and Final Data ... 8
6.1.1 Coherence between Provisional and Final Data ... 8
6.2 Coherence with the Results of the Reference Survey ... 8
6.2.1 Reference Survey ... 8
6.2.2 Coherence with Reference Data ... 9
7 Costs and Burdens ... 9
7.1 Survey Costs of the Office ... 9
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0
Methodological Explanations
Brief Description of the Survey
The purpose of the quarterly and annual surveys is to monitor trends in public electronic communications services, primarily voice services and data services. Annually also data on operators, infrastructure, employment, income and investment in the field of electronic communications are collected.
Legal Basis for the Survey
The surveys are carried out on the basis of the National Statistics Act (OJ RS, No. 45/1995 and No. 9/2001) and the Annual Programme of Statistical Surveys for 2014 (OJ RS, No. 97/2013).
Observation Units
Observation units are active network operators, contractors and service providers of electronic communications (hereinafter operators). These are business entities that are classified according to NACE 2008 in Section 61 Telecommunications (previous Classification of Activities 2002: 64.2 - Telecommunications) and are also enrolled in the Register of Operators at the Agency of Communications and Services of the Republic of Slovenia (hereinafter AKOS).
Coverage
Data relating to electronic communications services cover all active units that perform the observed activity and are according to the Electronic Communications Act (OJ RS, No. 13/2007) registered in the official register of operators. Coverage is full.
Key Variables
In both surveys several variables are monitored, the five key ones are: - fixed telephone connections,
- mobile network users, - SMS messages sent,
- outgoing traffic from the mobile network, - outgoing traffic from the fixed network.
Key Statistics
In both surveys several statistics are published, the five key ones are: - the number of fixed telephone connections,
- the number of mobile network users, - number of SMS messages sent,
- duration of outgoing traffic from the mobile network (in 1,000 min), - duration of outgoing traffic from the fixed network (in 1,000 min).
Questionnaire
The AKOS questionnaire in electronic form is designed for reporting units to be completed via the portal https://partner.akos-rs.si. According to AKOS the quarterly and annual questionnaires are too large to be published on paper, and they are also quarterly or annually submitted to rather large changes.
Methodological Explanations
The methodological explanations are available on the website:
Methodological explanations for both surveys are available online at:
http://www.stat.si/StatWeb/en/mainnavigation/methods-and-4/9
classifications/methodological-explanations, for the quarterly survey in the document Electronic communications services, and for the annual survey in the document entitled Performance of enterprises in the telecommunications sector.
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1
Relevance
1.1 Rate of Unavailable Statistics
The rate of unavailable statistics is 0, all the required statistics are calculated.
2
Accuracy
2.1 Sampling Errors
2.1.1 Sampling Error
Surveys are not conducted on the basis of a random sample, so the estimates do not contain sampling errors.
2.2 Coverage Bias
2.2.1 Coverage Bias
Surveys are conducted by full coverage of units, so there is no bias due to coverage.
2.3 Non-Sampling Errors
2.3.1 Non-Response Errors 2.3.1.1 Unit Non-Response Rate
SURS does not have direct contact with reporting units, because data collection is the responsibility of AKOS. AKOS estimates the unit non-response rate is 5%. The unit non-response rate is the highest for smaller cable operators.
2.3.1.2 Item Non-Response Rate
SURS does not have direct contact with reporting units, because data collection is the responsibility of AKOS. AKOS estimates the item non-response rate is 5%.
2.3.1.3 Imputation Rate
In these surveys SURS does not perform imputation of missing data. This is done by AKOS. If the reporting unit fails to transmit the data in time, the data for the previous quarter are imputed and are subsequently revised when the reporting unit reports the requested data.
2.3.2 Coverage Errors 2.3.2.1 Overcoverage Rate
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2.3.3 Measurement Errors 2.3.3.1 Editing Rate
The accurate evidence of corrections is recorded, however the editing rate is not calculated. However, we estimate that the editing rate on both sides (AKOS and SURS) was much lower than in the year 2013.
2.3.4 Rate of the Coherence of Data Sources
Most results of the quarterly and annual surveys are coherent, but the results which were revised retroactively differ.
3
Timeliness and Punctuality
3.1 Timeliness
3.1.1 Timeliness of the First Results
Table Napaka! V dokumentu ni besedila z navedenim slogom..1.1a: Timeliness of the First Release
(KO-TEL/L Survey)
Reference period 2014 Date of publishing 27. 9. 2015
Time lag T+271
Table Napaka! V dokumentu ni besedila z navedenim slogom..1.1b: Timeliness of the First Release
(KO-TEL-ČL Survey) Reference period I–III 2014 IV–VI 2014 VII–IX 2014 X–XII 2014 Average Date of publishing 20. 6. 2014 19. 9. 2014 19. 12. 2014 20. 3. 2015 Time lag T+81 T+81 T+80 T+79 T+80
3.1.2 Timeliness of Final Results
Results published in the First Release are final, so the timeliness of final results is the same as timeliness of first results.
3.2 Punctuality
3.2.1 Punctuality of the First Results
Table Napaka! V dokumentu ni besedila z navedenim slogom..2.1a:Punctuality of the First Release (KO-TEL/L Survey)
Reference period 2014
Announced date 28. 9. 2015
Publishing date 28. 9. 2015
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Table Napaka! V dokumentu ni besedila z navedenim slogom..2.1b: Punctuality of the First Release
(KO-TEL-ČL Survey) Reference period I–III 2014 IV–VI 2014 VII–IX 2014 X–XII 2014 Announced date 20. 6. 2014 19. 9. 2014 19. 12. 2014 20. 3. 2015 Publishing date 20. 6. 2014 19. 9. 2014 19. 12. 2014 20. 3. 2015 Difference 0 0 0 0
4
Accessibility and Clarity
4.1 Accessibility
4.1.1 Means Used for the Dissemination
Table 4.1: Means Used for Dissemination
No.: Mean Used
1
Website
(e.g. First Release, E-release) YES
2 Publication in the SI-STAT Data Portal YES
3
Publication in the interactive web tools
(e.g. Interactive Statistical Atlas of Slovenia, Thematic
Cartography) NO
4 Ad hoc prepared data for users according to their specification YES 5 Data available through telephone answering machine NO 6
General printed publications
(e.g. Statistical Yearbook, Slovenia in Figures) YES 7
Thematic printed publications
(e.g. Rapid Reports, Brochures) YES
8
External databases
(e.g. Social Science Data Archives, Eurostat, OECD databases) YES
9 Statistically protected micro data NO
10 Preliminary access to data according to standard protocol NO
4.2 Clarity
4.2.1 Results Presented
The results are presented in tables and charts followed by a comment. In the SI-STAT Database the absolute numbers are published. In the tables and charts of the First Release the data are presented in absolute numbers and indices, in the comment shares are calculated, as well.
4.2.2 Level (Detail) of Presentation
Results are presented for Slovenia in total, by the different variables, and separately for private and business users.
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5
Comparability
5.1 Comparability over Time
5.1.1 Length of Comparable Time Series
Data on electronic communication services were up to and including 2006 quarterly collected from operators and providers of these services with the statistical questionnaires KO-TEL/ČL and KO-TEL/L, but since 2007 we have obtained them from the Post and Electronic Communications Agency (AKOS). It collects them with its quarterly and annual questionnaires on the development of the electronic
communications market for its needs.
The Length of Comparable Time Series indicator (C2) is 20 (5 years x 4 quarters). 5.1.2 Breaks in Time Series
The transition to the takeover of data from administrative source in 2007 caused a break in the time series. Time series data have not been retroactively recalculated.
5.2 Geographical Comparability
5.2.1 Comparability with Other Members of the European Statistical System
According to Article 126 of the Electronic Communications Act, AKOS is obliged to report data to the European Commission. Member States of the European Union have a common methodology for data reporting prescribed by the European Commission (which gives all definitions). The European Commission coordinates the method and content of reporting with representatives of regulators at the meetings. Other institutions complete their questionnaires with their definitions. If definitions (of the institutions and of the regulator) are not consistent, regulators report data accompanied with explanations. International annual (and not quarterly) results are available on the Eurostat website: http://ec.europa.eu/eurostat/data/database, but not up to date (delay in the publishing of three years).
5.3 Seasonal Adjustment
In both surveys the results are not seasonally adjusted.
6
Coherence
6.1 Coherence between Provisional and Final Data
6.1.1 Coherence between Provisional and Final Data
We don't publish provisional results. We publish only final results, which need to be occasionally revised due to corrections made by reporting units and AKOS.
6.2 Coherence with the Results of the Reference Survey
6.2.1 Reference Survey
Sources for comparison and compared variables:
We compared all the results from the quarterly KO-TEL/ČL survey with the annual results from the KO-TEL/L survey.
We compared the results published in AKOS's Quarterly Reports on Development of the Electronic Communications Market and in Annual Reports, as well.
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We compared the results from the KO-TEL/L survey on the number of employees, the value of turnover and investments in electronic communication services with the results from the surveys on active population and from the structural business statistics.
6.2.2 Coherence with Reference Data
All the results from the quarterly KO-TEL/ČL survey are fully coherent with the results from the annual KO-TEL/L survey.
The results from AKOS's Quarterly Reports on Development of the Electronic Communications Market and from Annual Reports are coherent, as well. There are differences in the publication of quarterly results between SURS and AKOS because AKOS does not publish absolute numbers but calculates shares and market shares of operators. AKOS shows the results with the penetration of the population / households. Annual results from the KO-TEL/L survey on the number of employees are not coherent with the results from the surveys on active population and from the structural business statistics from the Statistical Register of Employment (SRDAP). The same is true for the results of the value of turnover and investments in electronic communication services compared to the results from the structural business statistics. The resources are namely not fully comparable due to methodological differences.
7
Costs and Burdens
7.1 Survey Costs of the Office
Table 7.2: Survey costs at the Statistical Office Reference period
Number of working hours spent 350 h per year
Number of reporting units that had to fill in questionnaires -
Survey period quarterly and annual
Number of questionnaires per year (total) -
7.2 Burden of Reporting Units
Table 7.3: Burden of the reporting units Reference period
Number of reporting units that submitted the data - Annual number of questionnaires per unit - Time spent to fill in a questionnaire (hours) -
Total time spent (hours) -
The burden of SURS is zero, because SURS receives the data from AKOS, which also collects the data for itself.
