Two smiling kids reach for a glass cookie jar with an orange lid on a wooden shelf, under a big orange question mark.
Illustration: AI-generated

How do you share cookies when everyone wants more?

A very serious economics question.

Both kids squeeze their eyes shut and wail with hands on their tummies, each with a giant speech bubble stuffed with cookies.
Illustration: AI-generated

Everyone is SO hungry.

Every kid says they are starving. Every kid says it louder. Nobody believes anybody.

A girl with cookie crumbs all over her cheeks and shirt, an empty plate and a round full tummy, glances sideways with a big speech bubble stuffed with cookies. The jar beside her is nearly empty.
Illustration: AI-generated

What's a fib?

A fib is a tiny lie. Like saying you're starving with crumbs all over your face.

A rule card hangs from the cookie jar: a bubble full of cookies crossed out with a red X, and a bubble with one cookie and a green tick. The boy reads it, finger on his chin.
Illustration: AI-generated

The trick.

Roger Myerson worked out how to make rules where fibbing never gets you more cookies.

The boy's bubble shows one cookie and he holds one cookie. The girl's bubble shows two cookies and she holds two. Both smile next to the open jar.
Illustration: AI-generated

So nobody fibs.

Telling the truth is the smart move. Now the jar knows who is really hungry.

A tiny cookie jar next to a giant tower of papers that runs off the top of the picture. The girl winks with her fingers crossed behind her back and a bubble full of cookies.
Illustration: AI-generated

Cookies are the easy part.

Real grown-ups are trickier than cookies. And the trick can't stop every fib. Sorry.

Portrait photo of Roger B. Myerson, smiling, in a jacket and tie
Photo: University of Chicago / Wikimedia Commons, CC BY 3.0

Meet the rule maker.

This is Roger Myerson. He won a Nobel Prize, a giant gold medal, for this idea.

For grown-ups: the jar is a mechanism. Don't tell the jar.

Roger B. Myerson shared the 2007 Prize in Economic Sciences in Memory of Alfred Nobel, one third each with Leonid Hurwicz and Eric S. Maskin, for having laid the foundations of mechanism design theory.

The jar is the revelation principle, roughly: if some set of rules gets an outcome when everyone plays their best plan, rules where honestly reporting what you know is everyone's best plan can get it too. Designers of auctions and regulation can then search a far smaller space. It does not stop people finding other, worse ways to play: that is slide six.

The twist: the prize's own background points to a sequence of later papers, while the selected catalog title does not appear in its bibliography.

That title, New approaches to solution concepts for cooperative games in normal form (Open Library lists it as 1973), stays a representative work; we could not open it. The committee cites his papers of 1979, 1982 and 1986, and its reading list names Optimal Auction Design (1981).

Sources

Claims log: 21 claims checked; 15 verified, 1 contested, 5 unverified and kept off this page.

Prize data: Nobel Prize Outreach AB (api.nobelprize.org, CC0). Work metadata: Open Library. The motivation is quoted verbatim.

vizmaya desk, 3 November 2026. More picture-free reading in all vizmaya stories.