This guest article by Josh Bersin, of consulting firm Berson and Associates, looks the reasons behind IBM buying Kenexa, one of the world’s largest talent management firms. Aside from having the potential to sell Kenexa’s services under the IBM brand (and benefit from their expertise in the realm of recruitment outsourcing services), he writes, IBM can also gain a significant technological advantage.  
Kenexa collects large amounts of information on the performance of employees. With nearly every vendor focusing on analytics these days, IBM can tap into that data and offer its clients insights into how well certain people perform in certain tasks, in certain conditions, and so on.