153 New York pedestrians were approached by someone dressed as either a civilian, a milkman or a police officer and were asked to help out a stranger by covering the cost of his / her parked car ticket.

The more authoritarian the uniform, the higher the chance they’d give the money. The civilian succeeded only 33% of the time, whereas the police officer managed 89%.

Determine an authority figure with relative expertise in relation to the group and behavior you’re looking to influence.

Ensure that the individual is credible and trustworthy.

Communicate their authority clearly.

For instance, using authority indicators like “Doctor,” “Judge,” “Award-winning” etc. Complementing this with a suitably-dressed photo of said individual will make any request much more effective.

Add a quotation too to bolster the effect, along with any extra reputational labels they might have (e.g. academic background, specialisms, career duration etc).

Compliance varies depending on demographics.

Older people are more compliant than younger people, for instance. For the young, use culturally-relevant aspirational models to mask authority whilst also nudging desired behavior.