Hello good day http://collections.vesterheim.org/sebamedcombr-b997.pdf#hedge topcon-medical.es  This is the link Twitter has dreamed of for a long time. Don’t expect real data guys to ever posit causality–leave that up to the journos and reporting on it (not saying that happened here, but just watch). Also, Twitter volume has been linked to real-world and non-social events for a while now, for instance the .91 correlation between Twitter volume and stock price (my company’s study): http://blog.bazaarvoice.com/2012/10/18/twitter-volume-reflects-stock-price-and-more-findings/