gamma_tail              Estimate of tail functional g and confidence
                        intervals for g and alpha
gamma_tailplot          Plot the estimated g and the corresponding
                        confidence intervals
lnorm_tail              Estimate of tail functional s and confidence
                        intervals for s and sigma
lnorm_tailplot          Plot the estimated s and the corresponding
                        confidence intervals
pareto_tail             Estimate of tail functional t and confidence
                        intervals for t and alpha
pareto_tailplot         Plot the estimated t and the corresponding
                        confidence intervals
