Behavioral Patch
Diagnosing the behavioral mechanism behind one real decision in the news — where it worked, and where it broke down.
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The Behavioral Patch is a weekly newsletter about the behavioral science hiding inside real decisions. Each edition takes one decision in the news — a pricing change, a policy, a program redesign — and asks what actually happened, why people responded the way they did, and where the fix holds up or breaks down. Every article below first appeared on LinkedIn. They are collected here in full, newest first, so the archive can be read outside the feed.
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The Prediction Market Scorecard That Counted Easy Calls as Proof
Author: Eugene Chan
Published: 11 November 2026Prediction markets were celebrated after the midterms for calling race after race, but the scorecard flatters them. Most of the wins were near-certainties priced above 90 percent, the calls are graded by the markets themselves, and the crowd herds onto early signals. What the record actually shows once easy calls are separated from real forecasts, and what would count as evidence next time.
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The AI Ad Disclaimer That Put the Sender in Charge of Warning the Voter
Author: Eugene Chan
Published: 4 November 2026In the 2026 cycle only about a quarter of AI-generated political ads carried any disclaimer, and the rule put the sender in charge of warning the voter. A warning that costs the sender and protects no one predictably goes missing. Why disclosure regimes built on self-labelling fail, and what provenance-based labels could do instead.
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The McDonald's Loyalty Program That Turned the App Into the Price
Author: Eugene Chan
Published: 28 October 2026McDonald's counts some 220 million loyalty members, and the number keeps climbing, but reach is not loyalty. App-gated prices turn the app into the price itself, members join because the discount requires it, and the metric grows whether or not anyone prefers the brand. How Goodhart's law and self-selection inflate loyalty programs, at McDonald's and well beyond it.
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The MLB Contract That Paid for the Past and Billed the Future
Author: Eugene Chan
Published: 21 October 2026Vladimir Guerrero Jr. and Shohei Ohtani both slumped after signing record contracts, but only one faced a backlash. The difference is not performance; it is the story fans tell about what the money bought. Regression to the mean, the psychological contract, and attribution explain why paying for the past so reliably bills the future.
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The Infrastructure Pitch That Lost to a Nuclear Plant
Author: Eugene Chan
Published: 14 October 2026Asked to choose, voters oppose a data center in their county more strongly than a nuclear plant. The benefits of new infrastructure are abstract and shared; the costs are concrete and local. Why technically sound pitches keep losing to that asymmetry, and what earning real consent, rather than announcing it, actually requires.
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The Insurance Denial That Lost on Appeal Most of the Time and Won Anyway
Author: Eugene Chan
Published: 30 September 2026Most health insurance denials that are appealed get overturned, yet fewer than 11 percent of patients ever appeal. The denial wins not because it is right but because the default does the work: friction, deadlines, and exhaustion filter out exactly the people with the strongest cases. How sludge turns a wrong decision into a final one.
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The Service Charge That Raised Wages and Broke the Goodwill It Was Meant to Earn
Author: Eugene Chan
Published: 23 September 2026A restaurant replaced tipping with a 20 percent service charge that cost diners no more than a generous tip, and the backlash was fierce. The money was not the problem; the removed choice was. Why a charge designed to raise wages and be fairer broke the goodwill it was meant to earn, and what the tipping ritual was quietly doing all along.
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The Salary Range That Satisfied the Law and Broke the Trust It Was Meant to Build
Author: Eugene Chan
Published: 16 September 2026Pay transparency laws asked employers to post honest salary ranges; many answered with bands running from one dollar to one million. The posting satisfies the law while anchoring nothing and signalling less. Why the workaround stuck, and why regulators from California to Washington have had to legislate what a range means.
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The Self-Checkout Redesign That Cut Labor Costs and Multiplied the Losses It Was Meant to Prevent
Author: Eugene Chan
Published: 9 September 2026Self-checkout was sold as a labour saving, and retailers are now quietly pulling the lanes back out. Removing the cashier also removed the guardian: theft climbed, honest customers absorbed the friction, and the losses multiplied past the wages saved. What the redesign missed about why people mostly do not steal.
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The Ticket Price That Doubled Before Checkout and Broke the Deal Fans Thought They Made
Author: Eugene Chan
Published: 2 September 2026Oasis fans queued for hours at a listed price, then watched tickets surge from around 200 dollars to past 500 at checkout. Dynamic pricing broke the deal fans thought they had made: a reference price, a fair-process expectation, and a seller entitled to the increase only within limits. Why the backlash was about the contract, not just the cost.
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The Loyalty Program That Grew Every Number Except Loyalty
Author: Eugene Chan
Published: 26 August 2026Airline loyalty programs have never had more members, more partners, or more revenue, and never less trust. Points devalue, transfer ratios shrink, and the program's profit no longer depends on anyone actually loving the airline. How variable rewards and misaligned incentives grew every number in the business except loyalty itself.
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The Policy That Fixed Compliance and Broke the Talent Pool
Author: Eugene Chan
Published: 19 August 2026Return-to-office mandates hit 93 percent compliance, and the people who left first were the ones with the most options. A policy can win on attendance while filtering the talent pool against itself. Adverse selection, Goodhart's law, and the broken psychological contract behind the mandate that fixed compliance and broke the workforce it needed.