While millions around the world are busy tweeting, Facebooking and getting LinkedIn, corporate leaders … well, aren’t. Among CEOs of the world’s Fortune 500 companies, only 20 have Twitter accounts. Many execs have been reluctant to fully buy in to tools that, to them, seem good only for public relations.

However, a new report from McKinsey Global Institute has found social technologies can boost company value anywhere from $900 billion to $1.3 trillion. It seems, in addition to external benefits, the tools, when used among employees, create efficiencies in everything from project management to HR.

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