Scarcity

Yes, modestly. Identical cookies from a nearly empty jar were rated more desirable than cookies from a full one, and a review of 416 results found scarcity cues raised willingness to buy by a small to moderate amount. But only 24 of those results measured real purchases, and the claim that being short of money harms thinking is less settled.

What the report found

1. The original finding is simple and has held up. In 1975, identical cookies from a jar holding two were rated more desirable and more valuable than cookies from a jar holding ten. They were not rated as tasting better.
2. Large reviews confirm the effect, with limits. A 2022 analysis of 416 results found that scarcity cues raised willingness to buy by a small to moderate amount, and about twice as much for less familiar brands.
3. Most of the evidence is hypothetical. Only 24 of those 416 results measured what people actually did; the rest asked what they would do.
4. Scarcity messages are everywhere online, and some are false. A crawl of about 11,000 shopping websites found low-stock messages on 581 of them, and some timers that kept the offer open after reaching zero.
5. The "scarcity mindset" is less settled. Early studies found that having too little narrows attention and harms thinking. Later tests found no such effect around payday, and a set of 20 replications produced clear successes and clear failures.

What is inside

1. The idea and where it came from
2. The original studies, explained
3. What happened when others tested it
4. Where researchers disagree
5. What we can say with confidence

Plus a timeline of the research, a diagram of four forces behind scarcity, a summary-of-findings table and a graded list of claims.

Who it is for

For anyone who writes product pages, launches or promotions, and anyone who has felt the pull of a countdown timer.

How we work

Evidence Reviews take one well known idea and ask what the research actually shows, from the original studies to the replications. Every claim is graded Established, Emerging or Untested. Where researchers disagree, as they do on the scarcity mindset, both sides are set out before we say where we stand.

Cite this report

The Why We Project (2026) Scarcity: What “only three left” does to a mind. Evidence Review No. 06. Dubai: Why We Tech Ltd. Available at: thewhyweproject.com