"Used in a positive way, social media can play a useful role in a person's wider support network.
Still, a statesman like Mark Hatfield seems less a useful role model than a political animal of a distant and extinguished age.
"The big banks could play a useful role in a rapid restructuring and Spain should take advantage of that," says Francisco Uria of KPMG, an accounting firm.
I still think this toy model plays a useful role as a positive control.
There are several reasons that the Clinton administration, even in its dying days, could still play a useful role -- perhaps, as a long shot, a defining role -- officials said today.
Even so, experimental moral philosophy could play a useful role, helping us to identify suspect experiences of disgust.
Physics has played a useful role in tackling a problem of great technical importance in biology.
This may be a case when government has a useful role to play in lowering those transaction costs.
While public sector workers "have less freedom than their business equivalents," they also experience a "stronger sense of fulfilling a useful role that contributes towards society".
