Statistical processing

Source data

To calculate the indices for refuse collection, slurry pump and freight transport by road mainly data (prices) from other statistics in Statistics Denmark are used. Monthly prices of some goods and services are collected from Price index for Domestic Supply (PRIS1115) and the Net Price Index (PRIS116). See the statistical documentation for these indices for more info. Labour costs relate to wage rates fixed by collective agreements between Danish Industry and the United Federation of Danish Workers (previously the Danish Specialized Workers' Union). Fuel prices are gathered as quarterly averages of daily prices from fuel stations incl. various taxes but excl. sales tax.

The weight basis is developed in collaboration with Danish Transport and Logistics and Danish Industry. Index calculations include costs of labour, social costs, repair and maintenance, fuel, tires, administration, insurance and capital costs.

Frequency of data collection

Primarily quarterly. Some prices are gathered monthly or yearly.

Data collection

Prices of materials are mainly collected from Price index for Domestic Supply (PRIS1115) and the Net Price Index (PRIS116). See the statistical documentation for these indices for more information on methods. Furthermore, some prices are collected from the internet, collective agreements and reporting by collaborators.

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. For indices excl. fuel, the fuel category has been removed from calculations. 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.