The Creating Shared Value phenomenon has generated a great deal of corporate and scholarly interest but there is also a wave of concern about its poor conceptualisation and the extreme difficulty indeed of meaningfully measuring it. I don't have any answers for you I am afraid, but I would encourage a thorough reading of the emergent literature around it. I should declare an interest - I have an article with colleagues critiquing CSV coming out in the very next issue of California Management Review Jan/Feb 2014 which includes a response from Porter & Kramer. The article is: Crane, A, Palazzo, G, Spence, L & Matten, D 2014, 'Contesting the value of Creating Shared Value' California Management Review, vol 56, no. 2. We are really hoping to help move the debate forward on this topic.
As with many emergent concepts, we need to be patient and wait for operationalization of the CSV. To be honest I am working myself on the topic and would be honoured to collaborate:-) so as prof. Laura Spence said - more studies should appear in the upcoming time. A. Crane et al.'s article is the first one that deals with the CSV notion with academic rigour so it is worth reading and allows to refine one's positioning about the CSV notion, although I actually do not agree totally with some of the arguments raised in the paper