In many cases there is more than one risk factor dividing the portfolio in different subclasses or sectors. One could for instance consider a first subdivision in industrial fire insurance and fire insurance covering private households. Other risk factors may be used to further classify the...

This is an original paper, which analyses some practical insurance problems of non-life insurance, with applications in the actuarial calculations that can be solved by means of credibility theory. Examples of the credibility results for the linearized premiums, as other applications for the...