The concept of nudge is the ultimate ‘acts not ads‘. Not telling what people should do, but using behavioral economics, choice architecture and small interventions to change people’s behavior.
A piece of tape to save energy?
Can a piece of tape help to nudge people not to take the elevator but the stairs? Rationally, the stairs is the better option. Energy-saving, a small and simple workout and -often- even faster. But still, many prefer the elevator. How can we change this with small interventions? That was the start of a remarkable experiment by Hivos and Boondoggle.
Oh … and no, nudge is not the same as gamification. Gamification is a mere footnote in the huge set of choice architecture and behavioral economics tactics.