Monitoring and decreasing public smoking among youth.

Researchers watched kids smoke in public places. They picked two spots: a fast-food lot and a school zone. Cops then ticketed any minor caught with tobacco. The team compared smoking counts before and after the tickets started.

The study ran without random groups. One site got tickets, the other did not. Observers simply counted lit cigarettes in view.

Ticketing cut youth smoking in plain sight. The drop was biggest at the burger-joint lot. Kids lit up less often where fines were real.

Four older litter studies used the same token-style logic. Hayes et al. (1975), Burgess et al. (1971), Bacon-Prue et al. (1980), and Clark et al. (1972) all paid kids for each piece of pre-marked trash they turned in. Each paper showed 55–90% less litter when a small reward followed the act.

The 2006 tobacco study swaps trash for cigarettes and police for teachers. The rule stays: if an outside agent delivers a quick consequence, the public behavior drops. The setting, age group, and prize type changed, yet the contingency pattern holds.

DeRoma et al. (2004) seems to disagree. They let teens help choose their own punishments and saw better buy-in. That feels opposite to the top-down tickets used here. The gap is about process, not outcome. M’s paper shows kids accept rules they help write. A’s paper shows kids still obey rules enforced by others. Both can be true: involvement helps, but clear penalties still work.

You can borrow the ticketing logic without writing tickets. Post a simple rule and tie a quick consequence to the target behavior. For example, if a student vapes on campus, an immediate lunch detention could follow. No courts needed. The key is fast, certain, and visible. Pair that with letting kids help set class norms and you get both compliance and buy-in.