Businesses have never done as much hiring as they do today and have never done a worse job of it, says Peter Cappelli of Wharton. Much of the process is outsourced to companies such as Randstad, Manpower, and Adecco, which in turn use subcontractors to scour LinkedIn and social media for potential candidates. When applications come—always electronically—software sifts through them for key words that hiring managers want to see. Vendors offer an array of smart-sounding tools that claim to ...