Statistical processing

Source data

Labour costs relate to wage rates fixed by collective agreements between the Haulage and Logistic' Association and the United Federaqtion of Danish Workers (previously the Danish Specialized Workers' Union). The indices are primary calculated on the basis of information from the price index for domestic supply, consumer price index and the index of net retail prices from Statistics Denmark.

Frequency of data collection

Primarily quarterly. Some prices are gathered monthly or yearly.

Data collection

For Cost index for refuse collection, slurry pump and freight transport by road mostly already existing data is used. Furthermore, some prices are collected from the internet and collective agreements.

Data validation

Before use, data is tested for unusual developments from one period to the next. The reported prices are only accepted if such developments can be accounted for. All prices are controlled and validated manually.

Data compilation

The Cost index for refuse collection, slurry pump and freight transport by road includes costs of labor, repairs and maintenance, fuel, tires, administration, insurance and capital costs. These are weighed together to form the total indices. The weights reflect the cost shares of the total costs of performing refuse collection, slurry pump and freight transport by road.

Adjustment

Materials may be replaced over time. There is running quality control of new materials that are used in the The Cost index for refuse collection, slurry pump and freight transport by road.

No corrections are made besides from what has already been described under data validation and data treatment.