Affiliation: | 1 School of Finance and Applied Statistics, Australian National University, Canberra ACT 0200, Australia brett.davis{at}anu.edu.au 2 Centre for Mathematics and its Applications, Australian National University, Canberra ACT 0200, Australia heacstat{at}maths.anu.edu.au 3 School of Finance and Applied Statistics, Australian National University, Canberra ACT 0200, Australia terry.oneill{at}anu.edu.au |