The Cost of Asking#
Why someone has to move first, and why that’s expensive
Four ideas, before anything else#
- revealed interest
- war of attrition
- coordination game
- inefficient equilibrium
Get these four straight now — everything today, and the midterm afterward, reuses them.
Revealed interest#
The moment you text first, you’ve told the other person something you can’t take back: you care enough to move. If they don’t feel the same, you’ve just handed them information they can use to feel superior, stall, or walk away — for free.
Economists call that cost of moving first revealed interest — acting reveals what silence hides.
That’s a costly signal, pointed at a person#
Week 3 called a claim credible when it would be expensive to fake. Moving first is that, except the claim isn’t about you — it’s “I want this, with you, specifically” — and the expense isn’t money, it’s the risk of being turned down in a way that’s now on record.
Nothing new is being invented here. It’s the same mechanism, aimed outward instead of inward.
War of attrition#
If both sides know that moving first is costly and staying silent is free, both sides have an incentive to out-wait each other — even though someone eventually has to move for anything to happen at all.
That standoff, where both sides burn time hoping the other blinks first, is a war of attrition.
Coordination game#
Whoever moves first isn’t really the point — what matters is that someone does, and both sides would rather that be settled quickly than dragged out. Getting two people to a “someone goes” outcome, any outcome, is the real problem.
That’s a coordination game: multiple workable outcomes, and no built-in way to pick one.
Inefficient equilibrium#
Here’s the uncomfortable part: “both wait” isn’t a bug in the model. Given that the other side is staying silent, neither side gains anything by being the one who breaks it — that’s a genuine equilibrium, nobody wants to unilaterally deviate.
It’s simply a worse equilibrium than “someone moves,” for both people, at the same time it’s perfectly stable. Economists call that an inefficient equilibrium: individually rational, collectively costly.
Now, back to the point#
Two people, three days after a good first date. Neither has texted.
The standoff#
| Day | Person A | Person B | What each is thinking |
|---|---|---|---|
| 1 | silent | silent | “if I text now I look too eager” |
| 2 | silent | silent | “if they liked it, they’d text” |
| 3 | silent | silent | “maybe neither of us actually liked it” |
Both would rather someone text than nobody. Neither wants to be the one who does.
What “both wait” actually costs#
| Combination | A’s cost | B’s cost | Outcome |
|---|---|---|---|
| Both wait | nothing | nothing | stable — and the worst outcome for both |
| A texts, B replies well | reveals interest, risked rejection | nothing | best outcome, but A bore the whole risk |
| A texts, B doesn’t reply | reveals interest, gets rejected | nothing | A pays the full cost alone |
| Both text at once | reveals interest, risked rejection | reveals interest, risked rejection | best outcome, and the risk is shared |
“Both wait” costs nothing and produces nothing. It’s still an equilibrium — that’s exactly the problem.
Who actually moves first#
The war of attrition’s exit-timing result: when two sides value the outcome differently, the side with more to lose from further delay moves first — not the more confident one, the more invested one.
“Playing it cool” is, in this light, a deliberate attempt to hide how much you’d lose by waiting, so you don’t end up being the one who moves.
The model can tell you a standoff is possible. It cannot tell you which of you is going to break it.
Midterm — sat this session#
Twenty items, weeks 1–7’s format: a photo, a bio line, an offline scenario. For each, say what you’d do and name the concept that makes it a defensible move — not just a confident one.
What today doesn’t settle#
The war of attrition has more than one equilibrium — both wait, or one moves — and nothing inside the model picks between them. Whatever actually breaks a real standoff (etiquette, a script, plain impatience) comes from outside the game entirely.
Week 12 is where this, and every prior week’s gap, come back at once.
See you next week#
Week 8: Stable Matching