Practical A/B testing frameworks, behavioral science, and conversion optimization — for growth leaders responsible for revenue.
38 practitioner-written articles covering everything the official Optimizely docs skip — Stats Engine mechanics, QA checklists, targeting gotchas, results interpretation, and program scaling. Built for experimentation leads who need answers, not tutorials.
Token price and benchmark scores are the wrong scoreboard for choosing an AI coding model. The metric that matters is cost per accepted production change — and by that measure a cheap model that needs three tries is more expensive than an expensive one that lands the patch. Here's the framework, the evidence, and the stack I actually run.
Most teams track the wrong activation metric. A practitioner's guide to choosing an activation metric that statistically predicts retention, instrumenting it, and avoiding the vanity-metric trap.
A practitioner's guide to writing A/B test hypotheses — the structure that survives review, the three failure modes that produce inconclusive tests, and how to tell a real hypothesis from a guess dressed up in hypothesis language.
An experiment requiring users to actively opt-in to autopay during plan selection caused a 15-20% drop in conversions. Three behavioral science principles explain why forcing commitment too early backfires, and the business economics reveal the hidden cost of lost lifetime value.
When a consumer subscription business reduced the visual prominence of pricing during a high-price market period, conversions jumped 12-15% and generated low-to-mid six figures in incremental revenue. The business case for treating attention as a finite economic resource.
Zhu, Yang, and Hsee documented the Mere Urgency Effect in 2018 — subjects systematically chose objectively worse-rewarded tasks when those tasks were labeled urgent. The label was sufficient to override the math. A behavioral economics deep dive into the Eisenhower Matrix, Cal Newport's Deep Work, and three operational defenses against the manufactured-urgency epidemic that powers most modern marketing.
Kahneman, Knetsch, and Thaler's 1990 Cornell mug experiment proved that ownership roughly doubles perceived value. The Endowment Effect is one of the most useful principles in commerce — and one of the most dangerous. A behavioral economics deep dive into Harry Brignull's dark-pattern taxonomy, the 2023 FTC Amazon fine, Patagonia's 'Don't Buy This Jacket' counter-example, and a single diagnostic question for separating ethical persuasion from manipulation.
Robert Zajonc's 1968 paper documented that humans like things more the more often they see them, even when the things are meaningless squiggles. Sixty years later, Utrecht University's 23-millisecond Lipton flash experiment confirmed the mechanism still works subliminally. A behavioral economics deep dive into Eurovision voting research, Distinctive Brand Assets, and why most challenger brands lose to incumbents that simply refuse to change.
In 2011, JCPenney hired the executive who'd built Apple's retail empire to do the same for them. By April 2013 Ron Johnson was fired and JCPenney had lost roughly $1B. The strategy wasn't wrong — it was brilliant in the wrong context. A behavioral economics deep dive into how False Consensus, Halo Effect, and Loss Aversion compounded to destroy a 110-year-old brand, and what 'context-dependence' means for any imported strategy.
Festinger's 1957 cognitive dissonance research showed that the moment after purchase is when customers are most psychologically vulnerable. Most brands respond with silence. A behavioral economics deep dive into Headspace's first-session congratulation, Apple's unboxing engineering, Tesla's delivery ritual, and the underdesigned 30-day window where every brand either earns lifetime loyalty or quietly forfeits it.
Dan Ariely's MIT candy experiment showed 257% more foot traffic when truffles cost zero instead of one cent. Cialdini's Reciprocity Principle is one of the foundational findings in behavioral economics — a deep dive into the Hare Krishna flower experiment, Costco's sampling economy, Lever Brothers' 1953 Surf rollout to four of five US households, and why free is a different psychological category from any positive price.
On October 14, 2012, Felix Baumgartner free-fell 24 miles from the edge of space in front of 8 million live YouTube viewers, with Red Bull's logo on his helmet. The $30M Stratos project produced roughly $1B in earned media — but the bigger story is how Dietrich Mateschitz used three decades of extreme-sports sponsorship to claim the emotional category of adrenaline that Coca-Cola and Pepsi had left unpriced.
For thirty years Patrick Winston gave a single lecture at MIT called 'How to Speak.' His central claim: the packaging of an idea matters more than its content. A behavioral economics deep dive into Slogan + Symbol + Salient Idea + Surprise + Story, a dissection of why Simon Sinek's TED talk hit all five points, and how the Heath brothers' SUCCES framework converges on the same underlying insight about what survives the Forgetting Curve.
Katzenberg and Whitman raised $1.75 billion before writing a line of code. Quibi launched in April 2020 and shut down by October. The autopsy reveals three biases — Halo Effect, False Consensus, and a fatal social-blindness engineering decision — compounding without any corrective mechanism. The Lollapalooza Effect as a failure mode rather than a success engine.
Four practitioners at SusHi Tech Tokyo 2026 proposed designing cities the way you'd design a movie. An operator's read on what the panel got right, where synthetic population simulators fall short, and why resource access usually beats narrative when you're building anything for real people.
When the Mini Cooper relaunched in the United States in 2002, the marketing didn't hide the car's size — it made the smallness the entire campaign. The result was a cult brand in an SUV-dominated market. A behavioral economics deep dive into Ein-Gar, Shiv, and Tormala's 2012 Stanford research on the Blemishing Effect, the legendary 1960 DDB campaigns (Volkswagen's 'Lemon' and Avis's 'We Try Harder'), and why admitting a small flaw is the costliest possible signal of credibility.
Charlie Munger's most useful idea wasn't about investing — it was that behavioral biases compound non-linearly when stacked. Amazon's product page stacks twelve of them simultaneously. A behavioral economics deep dive into Anchoring, Social Proof, Scarcity, Default Effect, Loss Aversion, Sunk Cost, and the rest — and the operational diagnostic for auditing your own checkout flow.
In 1977, Lee Ross at Stanford asked students if they'd wear a sandwich board on campus. Those who said yes thought 62% of others would; those who said no thought 67% of others would. Both groups were wrong, but in opposite directions — and the bias they were exhibiting explains the McDonald's Signature Burger, ESPN Mobile, and the Ford Edsel. A behavioral economics deep dive into why product teams build for themselves and what to do about it.
In 1985, Coca-Cola ran 191,000 blind taste tests over four years and spent $4M validating a new formula. New Coke failed catastrophically within three months. The research wasn't wrong — it was measuring the wrong thing. A behavioral economics deep dive into Nisbett & Wilson's 1977 paper, choice blindness experiments, and the foundational insight that customer self-report is largely confabulation.
Steve Jobs and Ron Johnson didn't benchmark Best Buy when designing the Apple Store. They sent their managers undercover to stay at Ritz-Carlton hotels and reverse-engineered the service philosophy. A behavioral economics deep dive into combinatorial creativity, why the Genius Bar is a hotel concierge desk in disguise, and what Ron Johnson's J.C. Penney disaster teaches about borrowed frameworks.
In 1885, Hermann Ebbinghaus mapped how human memory decays over time. Coca-Cola's $4 billion annual ad budget is a defense against his curve. A behavioral economics deep dive into Ebbinghaus's Spacing Effect, Byron Sharp's mental availability framework, the Distinctive Brand Assets discipline, and what your own marketing budget should look like if you actually understood the science of brand memory.
In the 1940s, a New York office building solved a slow-elevator complaint problem by installing mirrors instead of upgrading the lifts. The complaints disappeared. Sixty years later, Chris Hsee at the University of Chicago documented the underlying behavioral economics — humans dread idleness but need a reason to be busy. A deep dive into Disney's queue engineering, Uber's map, and where Idleness Aversion crosses into the dark patterns Tristan Harris warns about.
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