Accuracy and reliability

Overall accuracy

The data source of the statistics is the eIncome Register of Statistics Denmark which is the main data source for register-based employment statistics published by Statistics Denmark. This register is considered as highly reliable.

The classification by COFOG constitutes an estimated distribution based on information from the data reported on earnings as well as a distribution key constructed on the basis of information total wage and salary costs classified by functions in the National Accounts statistics for the general government sector. Consequently, this classification is subject to margins of considerable inaccuracy. The municipal/regional data reports contain information on account number in accordance with the chart of accounts of the Danish Ministry of Economic Affairs and Interior, and the central government data reports contain similar information in accordance with the chart of accounts of the central government. There is some degree of inaccuracy linked to the information on account number stated in the data reports. In addition to the information on account number in the data reports, the COFOG-classification of employment is based on a distribution key between the account numbers and the COFOG-groups from the National Accounts statistics for general government sector. This key is constructed on the basis of the distribution of total wage and salary costs. Budget versions are used to create the turnover key for the quarters of the year in question, which constitutes a potential source of errors in the provisional figures in relation to when the turnover key is based on accounting figures. Data editing is conducted and errors are systematically corrected in connection with the erroneous data reports and in connection with the turnover between the chart of accounts and the COFOG-classification, but this problem will give rise to margins of inaccuracy.

There are no sampling errors as the statistics are compiled on the basis of a census.

Sampling error

Not relevant for this statistics.

Non-sampling error

Not relevant for this statistics.

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 are considered as highly reliable.

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 public employment statistics publish provisional figures and data are revised both in accordance with the data source and information related to COFOG distributions.