Zoom-Shroom in the Mazda 5

Yale economist Dean Karlan reports on a nudge gone bad in the Mazda 5. Its choice architecture turned out to have serious consequences during a recent trip out west. Beware the car's dashboard.

(The Mazda 5) has sensors to know whether it is dark out, to turn the lights on. But here is the kicker: it only turns the dashboard lights on, not the headlights! So my subconscious thought the headlights were on, and I didn't turn them on. Until a cop pulled me over. And then said we fit his...