The Word-Swap Demand Effect: The cumulative public health behavioural research has progressively documented one of the more elegant findings in modern food labelling: reframing sugar-sweetened beverages as “liquid candy” rather than as “soda” or “beverages” reduces purchase intent by approximately 22 percent in controlled consumer studies, with the effect operating through accurate cognitive framing of … Read more
The Blank Box Conversion Tax: The cumulative behavioural economics research has progressively documented one of the more practical findings in modern conversion optimisation: pre-filled forms (with default values or pre-populated user data) convert at approximately 30 to 50 percent higher rates than equivalent blank forms. The mechanism operates through friction reduction — pre-filled forms reduce … Read more
The Future-Tense Trick: A single policy change at a mid-sized manufacturing firm in 1998 tripled employee savings rates within four years — from 3.5 percent of salary to 13.6 percent — without a single dollar of additional pay, employer match, or financial education. The mechanism is so cheap that the policy could be implemented in … Read more
The Paternalism Spectrum: Default enrollment into a 401(k) plan saves the average employee approximately $280,000 over a working life compared with opt-in defaults — while preserving the employee’s right to opt out at any moment with a single click. The same design philosophy applied to organ donation tripled organ availability in countries that adopted opt-out … Read more
The Inertia Premium: When patients with chronic conditions are offered a switch to a treatment that is mathematically better — lower cost, fewer side effects, more effective — roughly 60 to 70 percent refuse the switch. The same patients, asked to evaluate the new treatment as if naive (no current treatment exists), choose it overwhelmingly. … Read more
The Ownership Premium: When experimenters at Cornell randomly gave half of a roomful of students a coffee mug and asked them to set a selling price, while asking the other half to set a buying price for the same mug, the median seller demanded approximately $5.78 per mug — while the median buyer would pay … Read more
The Asymmetric Comparison: When a restaurant menu adds a third entrée priced at $52 alongside a $48 option and a $32 option, sales of the $48 entrée — the originally-targeted item — rise by an average of 33 percent. The $52 entrée is rarely ordered; it does not need to be. Its only function is … Read more
The Streak Premium: The smartphone apps that succeed in producing durable behaviour change — Duolingo, Strava, Headspace, Anki — all use the same psychological architecture: small, immediately rewarded actions that compound through visible streaks. The successful streak app converts users at roughly 3 to 5 times the rate of equivalent apps without streak mechanics, and … Read more
The Stamp That Was Already Filled In: Loyalty programmes that issue cards with the first two slots pre-stamped produce roughly 82 percent program completion rates, while loyalty programmes that issue equivalent blank cards (requiring the same total stamps to complete) produce roughly 19 percent completion. The pre-stamped cards have not given the customer any actual … Read more
The 24-Hour Filter: Adults who impose a mandatory 24-hour delay between identifying a non-essential purchase and completing it abandon the purchase approximately 56 percent of the time. The objects, services, and subscriptions the consumer would have bought immediately fail the cold-self review when the decision is paused. The cumulative annual savings from a consistent 24-hour-delay … Read more