Notes, Comments and Preliminary results Jun 05 2011 Cleiton Taufemback , Ricardo Giglio and Sergio Da Silva   Algorithmic complexity theory detects decreases in the relative efficiency of stock markets in the aftermath of the 2008 financial crisis   Abstract  Contact Information  Citation  Full Text  -  Note   Apr 21 2008 Sergio Da Silva , Raul Matsushita and Ricardo Giglio   The relative efficiency of stockmarkets   Abstract  Contact Information  Citation  Full Text  -  Note