how is loss reserving used in weibull w1 formula weibull growth curve which model is used by the hierarchical model how to fit a weibull curve what is the nlme in the curve when is weibull curve error w1 formula weibull growth curve trian when to use hierarchical model weibull growth curve what is the singularity error on weibull growth curve hierarchical loss reserving where is w1 in weibull growth curve which growth curve can be fitted to data at this level hierarchical models for loss reserving what is the formula to fit weibull growth curve how to fit weibull growth curve hierarchical modeling for loss reserving i got a singularity in backsolve at level 0 which of the following hierarchial growth curves is a singularity?