Guest article written for AllAboutAlpha.com – the official publication of the  Chartered Alternative Investment Analyst (CAIA) Association Originally posted at: http://allaboutalpha.com/blog/2012/06/24/michael-spence-nobel-laureate-on-information-and-momentum/   Analysis of any economic and financial system requires an understanding of two key factors; information and momentum. Understanding the information content of a system means having knowledge relating to…