<http://schema.org/alternativeHeadline>
"Economists at the University of Warwick have found happiness increases productivity by around 12%. Andrew Oswald, Eugenio Proto and Daniel Sgroi carried out a number of experiments to test the idea that happy employees work harder."^^<http://www.w3.org/2001/XMLSchema#string>
<http://qz.com/190659/happy-people-are-more-productive-especially-if-you-give-them-chocolate/>