Shortly before the building collapsed last Wednesday, there was a power cut, and all the generators started up, according to the initial findings of a government inquiry committee.

WSJ: Before Bangladesh Collapse, Some Clothing Retailers Fled Risk

The white paper, The Power of Like 2: How Social Marketing Works, follows up an initial study last year, this time with control tests on Facebook that isolated the actual impact of Facebook ads on sales, both online and in physical stores.

FORBES: Move up http://i.forbesimg.com t Move down