Sandy Pentland: &quot;Social Physics: How Good Ideas Spread&quot; | Talks at Google  similar theme.
<a href="https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=HMBl0ttu-Ow" rel="nofollow">https:&#x2F;&#x2F;www.youtube.com&#x2F;watch?v=HMBl0ttu-Ow</a>   I think its in this video that he talks about the productivity gains of the seemingly random exchanges of ideas, and the possibility to increase them by scheduling and thoughtfully designed common areas.