Eckel, Stefanie Martina; Löffler, Gunter; Maurer, Alina; … - 2009
to firms with headquarters located in the USA, which reduces
the number of firms to 465 from a total of 500 firms in the … the headquarters of S&P 500 firms considered in the present
paper are located within the USA, we can consider the sequence … territory of the USA. The latter point process on the whole sphere Sρ is
assumed to be isotropic, which means that its …