Knowledge to make smart decisions.
The Plateau That Vanishes: The famous Kahneman-Deaton finding — that day-to-day emotional well-being stops rising at roughly $75,000 of household income — was, for a decade, one of the most cited statistics in popular economics. The 2021 follow-up by Matthew Killingsworth, using a continuous experience-sampling app rather than a one-off survey, decisively overturned the plateau. … Read more
The Trust Override: Subprime lending storefronts spend roughly 3.5 times more on warm, family-friendly branding than do conventional bank branches in the same neighbourhoods. The marketing budget is not vanity. It is the most cost-effective component of an annualised lending margin that frequently exceeds 400 percent on payday loans — an industry built on the … Read more
The Cardiologist’s Question: A self-reported assessment of workplace stress, taken once at age 45, predicts a person’s 20-year risk of myocardial infarction more strongly than their LDL cholesterol level. The medical industry has spent four decades optimising for the wrong variable. The single most powerful intervention for cardiovascular risk is not, for most working adults, … Read more
The Hidden Cognitive Edge: When professional athletes are seated in front of a Stroop test — the classic cognitive task that measures the brain’s ability to inhibit the wrong impulse and select the right one — they consistently outperform sedentary controls by roughly 18 to 24 percent, with the gap widening as task complexity increases. … 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 Asymmetric Mirror: When retail investors are asked to explain their winning trades, 82 percent attribute the result to skill; when asked to explain their losing trades, 78 percent attribute the result to market conditions, bad luck, or external manipulation. The two attribution rates would, in a calibrated mind, be equal. Their inequality is the … Read more
The Shower Equation: EEG recordings of people in mildly distracted, low-stakes physical states — walking, showering, washing dishes — show a sustained increase in theta-wave power of roughly 40 to 60 percent compared with the same person sitting at a desk staring at a screen. Theta is the brainwave band that the insight literature has … Read more
The Carcinogen You Cannot See: In 2007, the World Health Organization’s International Agency for Research on Cancer (IARC) classified night-shift work as a “probable human carcinogen” (Group 2A) — placing it in the same risk tier as anabolic steroids, lead compounds, and high-temperature frying. A subsequent 2019 reclassification refined the language but kept the classification: … Read more
The Tryptophan Myth: One of the most repeated facts in popular nutrition — that turkey’s high tryptophan content causes the post-Thanksgiving sleepiness — is essentially false. Turkey contains less tryptophan per gram than chicken, cheese, or pumpkin seeds. The drowsiness after a holiday dinner is real, but its cause is the systemic biology of consuming … Read more
The Methylation Bargain: A 2024 randomised trial showed that adults consuming three daily servings of polyphenol-rich foods slowed their biological-age clock by an average of 1.8 years over a 12-month period, compared with calorie-matched controls who ate the same Mediterranean pattern without the polyphenol emphasis. The cost of the intervention was roughly $1.20 per day. … Read more