Analyses of sequence data from three nuclear genes and one chloroplast gene region for Juniperus blancoi, J. b. var. huehuentensis, J. mucronata, J. scopulorum and J. virginiana revealed that the J. blancoi huehuentensis mucronata complex is closely allied but distinct from J. scopulorum and very distinct from J. virginiana. The combined DNA data support J. mucronata as a sibling species to J. ...

We analyze the performance of RiskMetrics, a widely used methodology for measuring market risk. Based on the assumption of normally distributed returns, the RiskMetrics model completely ignores the presence of fat tails in the distribution function, which is an important feature of financial data. Nevertheless, it was commonly found that RiskMetrics performs satisfactorily well, and therefore t...