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 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

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