Advertising Age -- During an average week, a recruiter reviews countless resumes, responds to hundreds of e-mails, conducts phone screens, video interviews and in-person interviews -- all to find one perfect candidate match. The sheer volume of work has been exacerbated by high unemployment and a down economy. As a result, many recruiters are casting a smaller net, relying on sources like social media, employee referrals and Boolean search to attract a smaller, more qualified set of candidates.