Presentation of Edwin Vlems at the NIMA The Case Congress at 15 October about prediction metals prices through crowd sourcing. See http://about.me/edwinvlems. Click here for Prezi: http://prezi.com/zrkea1lp3bfk/toekomstvoorspelling-middels-crowd-sourcing-in-de-b2b-nima-the-case-15-oktober-2013/