Accuracy and reliability

Overall accuracy

Since electronic communications networks and services can be offered in Denmark by anyone without prior permission, registration or the like, the assumption is that not all providers in the Danish telecommunications market are included in the telecommunications statistics. In addition, neither foreign providers nor providers offering exclusively hotspots are included in the statistics.

The three most recent six month periods in the statistics on broadband and active Internet subscriptions are preliminary and are therefore continuously updated. Figures that are 32 months or older at the reference date are considered final. The market statistics from The Danish Media Research's Online Index are always published by Statistics Denmark irrespective of missing reports. Delayed reporting are incorporated in the next coming statistics. The latest quarters in revenue on the internet by ad type are therefore preliminary.

No uncertainty calculations are available.

For further considerations regarding precision and reliability are referred directly to the original sources. For information regarding the precision and reliability of the historical Statbank tables are referred to respectively Danish Media Association, TNS Gallup, the industry organization Consumer Electronics and Copydan.

Sampling error

Not relevant for these statistics.

Non-sampling error

In view of the competition in the telecommunications market, market shares in the Danish Energy Agency's telecommunications statistics are not published for providers with a market share of less than five percent, unless the company is part of a group collaboration with another telecommunications company and the companies' total market share is or exceeds five percent. This applies from the second half of 2011. Previously, the discretionary limit was three percent.

Quality management

Statistics Denmark follows the recommendations on organisation and management of quality given in the Code of Practice for European Statistics (CoP) and the implementation guidelines given in the Quality Assurance Framework of the European Statistical System (QAF). A Working Group on Quality and a central quality assurance function have been established to continuously carry through control of products and processes.

Quality assurance

Statistics Denmark follows the principles in the Code of Practice for European Statistics (CoP) and uses the Quality Assurance Framework of the European Statistical System (QAF) for the implementation of the principles. This involves continuous decentralized and central control of products and processes based on documentation following international standards. The central quality assurance function reports to the Working Group on Quality. Reports include suggestions for improvement that are assessed, decided and subsequently implemented.

Quality assessment

Estimates on broadband subscriptions and active internet subscriptions are based on the Agency for Data Supply and Infrastructure's telecommunications statistics, which are based on reports from most of the providers of electronic communications networks and services in Denmark. The figures are therefore considered to show a fairly accurate picture of the development in the number of broadband subscriptions and active internet subscriptions.

Internet revenue by ad type is based on market statistics from The Danish Media Research's Online Index, which is used and recognized by the industry.

For further considerations regarding the overall quality, please consult the sources directly.

Data revision - policy

Statistics Denmark revises published figures in accordance with the Revision Policy for Statistics Denmark. The common procedures and principles of the Revision Policy are for some statistics supplemented by a specific revision practice.

Data revision practice

The three most recent six month periods in the statistics on broadband subscriptions and active internet subscriptions are preliminary and therefore continuously updated. The total number of broadband subscriptions is typically revised by ± 1 per cent. Figures that are 32 months or older at the reference date are final. The market statistics from The Danish Media Association's Online Index are always published irrespective of missing reportings. Delayed reportings are incorporated in the next coming statistics. The latest quarters in revenue on the internet by ad type are therefore preliminary.