What is a typical formal job title for a person working on social media marketing in market research field?

Recently recieved a job offer but am unsure about the title? It is in market research and involves primarily social media marketing but also other online PR/marketing strategies. What are some typical formal job titles for people doing similar jobs in this field?

Your Social Media ROI

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Does you business use social media and networking?  I suspect that you do or that you are considering it, or you probably wouldn’t be hanging around this blog.

A recent study of businesses who use social media found that, on average, each social media profile you support requires an investment of thirty-two [...]