Crowding Out Effect

What is the crowding out effect?

In motivation research, the crowding out effect occurs when an external intervention weakens an existing internal or social reason for acting. Financial rewards, penalties, or controls may change what an activity means to the person. This is the motivational use of “crowding out,” distinct from its other meanings in economics.

How incentives can change motivation

Frey and Jegen’s motivation crowding theory allows external interventions to weaken or strengthen intrinsic motivation. An incentive’s direct effect and its effect on existing motivation can operate together, so weaker intrinsic motivation does not necessarily mean lower total performance.

In the theory, an intervention can feel controlling if it replaces a person’s own reason for acting with pressure to satisfy someone else. It can feel supportive if it acknowledges competence and leaves room for choice. These are proposed routes to changing existing motivation, not conclusions that can be read directly from the size of a payment or a change in output.

Example of a crowding-out concern

In Gneezy and Rustichini’s daycare field study, introducing a fine increased late pickups, and removing it did not reverse the increase during the study. The authors proposed that the fine changed parents’ understanding of the arrangement. In their social-norm explanation, staying late initially looked like a teacher’s favor that parents should not overuse. A stated charge could make that same time look like an extra service parents were entitled to buy. They also offered an explanation based on new information about possible penalties; the study did not distinguish these accounts.

Crowding out in work, education, and volunteering

The daycare result does not establish that all fines backfire or isolate a single psychological mechanism. Pay at work, recognition for volunteers, and grades in school can have different meanings. Whether an incentive reduces a prior reason for acting is a question to investigate in that setting, not a conclusion that follows from using a reward.

To evaluate an incentive, distinguish behavior while it operates, behavior after its removal, and measures of underlying motivation. A short-term increase or decrease alone does not establish motivational crowding out.