Dozens of governments have been using the insights from the burgeoning field to 'nudge' citizens in ways that improve their well-being. But some worry Trump might use it for less altruistic ends.
If the site is increasingly where people are getting their news, what could the company do without taking up the mantle of being a final arbiter of truth?
Educating people about the dangers of sugary drinks has little impact on their consumption and taxing them is unpopular. Luckily, there is a third way.
It's that time of the year when students get ready to enroll in college. But many don't, even after being accepted. What can be done?