The choice nobody makes

you are in this shape if

• Stated support is high and enrolment is low, and the gap does not close with awareness
• The action costs almost nothing and is still not taken
• The decision is one people intend to make later and never do

the moves

Change what doing nothing produces

Make the outcome you want the one that happens absent any action, and let the person opt out instead of in. Nearly all of the gap is inertia rather than objection.

Move the cost to a future self

Commitments that bite later are accepted now at rates that immediate ones never reach — schedule the increase, do not request it.

Attach the choice to something already happening

Fold the decision into a moment the person is already at the counter for, so it costs no separate act of will.

where it was solved

1. 1949Government of FinlandPublic health / social policyReceiving Finland's maternity package — free, valuable baby supplies every family could use — required nothing more than showing up to one early prenatal appointment; families who preferred not to could take a smaller cash grant instead, but the box itself, worth substantially more, only unlocked by completing the health-system checkpoint the state actually wanted every pregnant woman to hit.The prenatal-checkup requirement is credited with pushing Finland's prenatal-clinic registration rate above 90%, a striking result for a purely voluntary incentive with no penalty attached. On the harder question of infant mortality, the honest picture is more contested than the popular version of this story suggests: a 2022 peer-reviewed natural-experiment study found the 1949 universalization coincided with a step-decrease in infant mortality, but the same study found the 1938 introduction coincided with an increase, and concluded the effect on mortality specifically 'cannot be disentangled' from World War II, postwar antenatal-care rollout and other concurrent policy changes — Wikipedia states plainly that there is no established evidence the box itself affected infant mortality, even though Finland's infant mortality later fell to among the lowest in the world.
2. 1998Richard Thaler & Shlomo Benartzi (Save More Tomorrow)Retirement finance / behavioral economicsThe Save More Tomorrow (SMarT) program, field-tested at a midwestern manufacturer in 1998, let employees pre-commit today to automatically increasing their 401(k) contribution rate by a set percentage at each future pay raise, with the option to opt out at any time — but requiring an active decision to stop rather than an active decision to keep contributing more.Participating employees' savings rates rose from an average of 3.5% to 13.6% of pay over 40 months, with 78% of participants still enrolled through four subsequent pay raises rather than opting out. The program has since scaled to more than 15 million American workers, and in December 2022 the US Congress made auto-escalation a required default feature of most new 401(k) plans under the SECURE 2.0 Act, effective 2025.
3. 2000AP7 (Sjunde AP-fonden) / Swedish Pensions AgencyPublic pensions / personal financeAP7's default fund runs a low-cost, broadly diversified, age-adjusted index strategy, requiring no active decisions from savers at any point — the fund simply exists as the outcome for everyone who never chose otherwise, alongside the hundreds of actively managed funds available to whoever wanted to pick their own.According to the Swedish Pensions Agency's 2025 analysis, just over 13% of savers who actively selected their own funds outperformed AP7's default fund over the long term — meaning roughly 87% of people who spent time and effort choosing their own funds would have done better simply doing nothing. The agency's data additionally found that the more often a saver switched funds, the worse their average returns tended to be, and over the preceding decade AP7's default produced an average annual return of 13.5% against an average 7.8% for actively chosen private funds.
4. 2003Eric Johnson & Daniel Goldstein (Columbia Business School / London Business School)Public health / behavioral scienceJohnson and Goldstein's 2003 Science paper found that opt-in countries clustered at low effective consent rates, typically well under 25% and in some cases in the single digits, while opt-out countries clustered above 90%, even between neighboring, culturally similar country pairs such as Germany and Austria. They followed the observational finding with a controlled online experiment that isolated the default itself as the causal variable: with identical people facing an identical choice, an opt-in default produced roughly 42% donors, a no-default forced-choice condition produced about 79%, and an opt-out default produced about 82% — confirming the default alone, not just underlying cross-country attitude differences, drove a large share of the gap.The paper became one of the most-cited studies in behavioral economics and choice-architecture research, and is credited with directly influencing subsequent organ-donation policy debates and default-based nudge interventions across other domains — from retirement savings auto-enrollment to data-privacy consent design. A 2012 peer-reviewed follow-up (Davidai et al.) pushed back on treating the default as the sole explanation, finding that inertia, perceived social norms, and the different psychological meaning of 'opting out of donation' versus 'opting into donation' all contribute alongside the default itself, though the researchers still identified sheer inertia as likely the primary driver.
5. 2008Israeli Ministry of Health / KnessetOrgan transplantation policyIsrael's 2008 Organ Transplantation Law, with priority allocation taking effect in 2010, gives registered donors — and, after a three-year wait, their first-degree relatives — bonus priority points on the transplant waiting list if they ever need an organ themselves. Anyone who had already donated an organ, or whose immediate family member became a deceased donor, receives top priority immediately, no waiting period. The pitch to the public shifted from 'help a stranger' to 'this list favors people who are already on it.'The clearest attributable effect is on the harder of the two numbers: family consent to donation after death, which is where most registration campaigns fail even when the deceased carried a donor card. Consent rose from roughly 42% in 2007 to 62% by 2016. Donor-card sign-ups spiked during the 2011–2013 publicity push but later leveled off, and Israel's overall deceased-donor rate — about 10 per million people in 2016 — still trailed most Western European countries, so the law changed behavior at the family's bedside more clearly than it changed the national donation rate.
6. 2008stickK (Dean Karlan, Ian Ayres)Behavioral economics / consumer softwareIn 2008, Karlan and Ayres launched stickK, a website where users write a binding 'commitment contract' for a personal goal, put up real money as a stake, and — critically — can choose to have any forfeited stake go not to a neutral charity but to a designated 'anti-charity,' an organization on the opposite side of a cause the user cares about (the platform curates paired anti-charities across issues like gun control, abortion, and the environment, so a user can pick the org that would make failure feel worst).stickK's own tracked results found users who staked money were substantially more likely to hit their goals than those who set goals without a financial commitment, and specifically that users who selected an anti-charity as the forfeit destination were roughly 15% more likely to succeed than those who chose to donate to a friend or a neutral charity instead — turning the identity of the recipient, not just the size of the stake, into a measurable behavioral lever.
7. 2013UK Jobcentre Plus / Behavioural Insights TeamPublic sector / employment servicesThe pilot replaced the backward-looking compliance question with a forward-looking, written commitment device: claimants stated exactly what they would do over the next two weeks, discussed it with an advisor, and returned to report on and revise that specific plan rather than simply confirming a generic activity count after the fact.In the initial trial, jobseekers who received the new commitment-device approach were 15-20% more likely to be off benefits within 13 weeks of signing on; a subsequent stepped-wedge controlled trial scaled the intervention to 88,033 participants across 12 Jobcentres (following a 2,383-person pilot at a single site) and confirmed a significant increase in the rate at which claimants exited benefits.
8. 2016Government of OntarioPublic health / organ donation registriesResearchers tested reframing the donor-registration prompt from an altruism ask to a reciprocity question — 'If you needed a transplant, would you have one?' — forcing renewers to weigh their own self-interest before declining. Ontario rolled the wording into its province-wide driver's-licence renewal form.In the field trial (n=3,330), new registrations jumped from 4.1% to 7.4% of renewers, an ~80% relative increase, for the cost of a sentence. Ontario adopted a simplified registration form using the reciprocity prompt province-wide in 2016.

what breaks in transit

• A default is a decision made on someone's behalf; it needs to be defensible when they notice, and easy to reverse.
• Enrolment is not participation — check the behaviour downstream, not just the sign-up number.
• Defaults inflate consent figures. Do not read a high opt-in rate under a default as evidence of preference.

adjacent plates

• 13The unheeded instruction
• 05The handoff