Dear Neus,

I hope this article may be of some help to you.

1. Measuring the Business Value of Big Data. http://www.ibmbigdatahub.com/blog/measuring-business-value-big-data

2.A Few Good Tools for Measuring and Monitoring Social Media. Andrea Berry and Chris Bernard, August, 2011. http://www.idealware.org/articles/few-good-tools-measuring-and-monitoring-social-media

3. Visualizing Big Data: Social Network Analysis.  By Michael Lieberman

https://c.ymcdn.com/sites/www.casro.org/resource/collection/E0F10496-BE87-48E8-8746-521D403EE4A2/Paper_-_Michael_Lieberman_-_Multivariate_Solutions.pdf

Well it depends on what you're up to by doing this analysis. Whether you want to measure the awareness, the engagement, or the dialectical content on the social media, each of which involving different metrics to be analysed. The paragraph below explains all:

"Social analytics measure three broad categories: awareness, engagement, and word-of-mouth or reach.3 Awareness looks at the exposure or mentions of social content and often involves metrics such as the number of video views and the number of followers or community members. Engagement measures the level of activity and interaction among platform members, such as the frequency of user-generated content. More recently, mobile applications and platforms such as Foursquare provide organizations with location-based data that can measure brand awareness and engagement, including the number and frequency of check-ins, with active users rewarded with badges. Finally, reach measures the extent to which content is disseminated to other users across social platforms. Reach can be measured with variables such as the number of retweets on Twitter and shared likes on Facebook." -Four strategies to capture and create value from big data

S Parise, B Iyer, D Vesset - Ivey Bus J, 2012 - iveybusinessjournal.com

dont forget UCINET

https://sites.google.com/site/ucinetsoftware/home

Thank you! :-))