The motivation for writing this paper came from a realisation that of all the actuarial tools and techniques that I use in my professional life, there is only one where I find I have to dig out my original B3 (for such was the name of the General Insurance course at the time) study notes, to refresh my memory of the relevant formulae. In all other areas the relevant formula or technique can be ...

The best unbiased linear predictor for a stochastic process is the best unbiased predictor (i.e., the linearity constraint is removed) if the process is Gaussian. This provides a stronger justi cation for the universal kriging predictor than is generally o ered. For log-Gaussian processes, we show that the standard predictor (obtained by correcting the bias of the exponential of the best unbias...