Erfaringstall

Erfaringstall, often translated as "experience numbers" or "experience factors," are a concept primarily used in insurance and actuarial science to quantify the risk associated with a particular group or exposure. These numbers are derived from historical data and represent the average frequency or severity of claims observed within a defined period for a specific category of insured individuals or entities.

The purpose of erfaringstall is to provide a statistical basis for setting insurance premiums. By analyzing past claims data, insurers can estimate the likelihood of future claims and the potential cost associated with them. For example, in auto insurance, erfaringstall might indicate that drivers in a certain age group or with a particular driving record have a higher incidence of accidents. This information then informs the premium charged to individuals in that group.

The calculation of erfaringstall typically involves comparing actual claims experience to an expected experience based on broader industry averages or prior assumptions. The resulting factor, the erfaringstall itself, adjusts the expected cost to reflect the specific observed risk. A factor greater than one suggests higher than average risk, while a factor less than one indicates lower than average risk. These numbers are dynamic and are recalculated periodically as new data becomes available.