Accuracy and reliability

Overall accuracy

The source of the statistics is the Danish Book List, which is part of the National Bibliography. The Danish Book List receives books and other material from the publishers as a result of the Danish Duty Delivery Act and therefore covers the vast majority of publications in Denmark.

The figures for the past six years are preliminary. This is due to post-registrations of published books in the Danish Book List, which results in under-reporting. The uncertainty is greatest for the counting year. The re-adjustment of the counting year can be considerable the following year.

Sampling error

Not relevant for these statistics.

Non-sampling error

The source of the statistics is the Danish Book List, which is part of the National Bibliography. For publishing where copying has been made abroad, the delivery obligation is incumbent on the publisher. If the publisher is not a resident of Denmark, the duty of delivery is the responsibility of the importer representing the publisher in Denmark. If the publisher resides abroad and there is no importer in Denmark, the obligation to submit is the responsibility of the publisher.

The figures for the past six years are preliminary. This is due to post-registrations of published books in the Danish Book List, which results in under-reporting. The uncertainty is greatest for the counting year. The re-adjustment of the counting year can be considerable the following year.

Quality management

Statistics Denmark follows the recommendations on the organisation and management of quality set out in the Code of Practice for European Statistics and the accompanying implementation model, the Quality Assurance Framework. Read more about these on the page Quality in official statistics.

Quality management is supported by common principles, guidelines and managerial responsibility for quality in statistical products and processes. The aim is to ensure a systematic and consistent approach to quality across the entire statistical production.

Quality assurance

Quality assurance at Statistics Denmark is integrated into the statistical production processes and is carried out in accordance with the principles of the Code of Practice for European Statistics. Read more on the page Quality in official statistics.

Quality assurance includes the continuous use of standardised procedures, documentation in line with international standards and internal controls related to data collection, data processing and dissemination. Experience gained from production is continuously used to identify needs for adjustments and improvements.

Quality assessment

The statistics cover the area for produced books very thoroughly, but do not cover all book publications in Denmark.

The figures for the past six years are preliminary. This is due to post-registrations of published books in the Danish Book List, which results in under-reporting. The uncertainty is greatest for the counting year. The re-adjustment of the counting year can be considerable the following year.

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 figures for the past six years are preliminary and audited annually