Foundations
Incentives
People and businesses adjust what they do based on the rewards and costs attached to their choices — change the reward or the cost, and behavior follows.
Definition
An incentive is anything — a reward, a cost, a rule, a price — that makes one choice more or less attractive relative to the alternatives. Because people generally pick the option that leaves them best off given the incentives in front of them, changing the incentives tends to change the choice people make.
Why this exists
Because of scarcity, people constantly have to choose between competing uses of their limited time and money. Incentives are what tip those choices one way or another: raise the reward for doing something, or the cost of not doing it, and more people will do it; do the reverse, and fewer will.
This matters beyond individual choices, because it means the design of a system — a tax code, a company's pay structure, a government program — shapes the behavior of everyone operating inside it, often more than the system's stated intent does. A rule meant to encourage saving, discourage pollution, or reward hard work only works if the incentive it actually creates lines up with that intent. When it doesn't, people still respond rationally to the incentive that's actually there, not the one that was intended — which is why policies and pay structures can backfire in ways their designers never expected.
Worked example
Imagine a parent pays $5 per chore completed, with no limit. A kid who wants more spending money will likely do more chores — the incentive (money) is directly tied to the behavior (chores).
Now imagine the parent instead pays a flat $20 allowance every week, no matter how many chores get done. The incentive to do any individual chore drops sharply, because doing it or skipping it no longer changes the payout. The chores probably get done less often — not because the kid changed, but because the incentive did.
Common misconceptions
“Incentives are always about money.”
Non-monetary things — time saved, recognition, avoiding punishment, convenience — are incentives too, and are often stronger motivators than a cash reward.
“People always respond to an incentive exactly the way it was designed to work.”
People respond to the actual incentive created, which sometimes differs from what the designer intended, producing unintended side effects the designer didn't foresee.
“Incentives only matter for big decisions like careers or taxes.”
Incentives shape everyday small choices too — where to shop for a better deal, whether to pack lunch instead of buying it, whether to walk or drive somewhere close.
Also in the Glossary: Incentive