Behavioral Economics Explained Simply
Loss aversion: losses hurt more than equal gains feel good. Mental accounting treats money differently. Anchoring locks onto first numbers seen.
January 2026
July 2025
Incentive Design Failures Explained
Soviet nail factory paid by weight produced useless heavy nails. Cobra breeding bounty in India increased cobras. Metrics drive unintended gaming.
June 2025
How Incentives Shape Outcomes
Incentives direct attention and effort toward rewarded behaviors. They signal importance and create competition.
Origins of Decision Theory
Decision theory origins: Bernoulli introduced expected utility in 1738. Von Neumann and Morgenstern developed game theory and axioms of...
Origins of Behavioral Economics
Behavioral economics origins: Simon introduced bounded rationality in 1950s. Kahneman and Tversky revealed cognitive biases and heuristics in 1970s.
Step-by-Step: Analyzing Incentive Structures
Map what's rewarded with bonuses and recognition. Identify what's punished with penalties and criticism. Compare stated versus actual incentives.
Translating Behavioral Economics into Real Decisions
Apply behavioral economics: recognize cognitive biases like anchoring and loss aversion, understand status quo bias, and design choices accounting...
What Is Supply and Demand
Supply and demand is the most fundamental framework in economics. Here is how it works, what price elasticity means, when markets fail, and what...
February 2025
Nudge Theory: Choice Architecture and Behavioral Policy
Nudge Theory shows how small changes in choice architecture produce large changes in behavior without restricting freedom.
January 2025
The Norm of Reciprocity: Why Gifts Create Debts and Favors Create Obligations
In 1971, Dennis Regan had a confederate give subjects a Coke during a break in an experiment.
Prospect Theory: Why Framing Changes How Outcomes Feel
Tversky and Kahneman's 1981 Asian Disease Problem: 72% of subjects chose certain survival of 200 people over a gamble for all 600.
Mental Accounting: Why a Dollar Is Not Always a Dollar
You have two $100 bills in your wallet: one earmarked for rent, one for entertainment. You spend the entertainment $100 on dinner.
December 2024
The IKEA Effect: Why We Overvalue What We Build Ourselves
Norton, Mochon, and Ariely asked subjects to assemble IKEA boxes, then bid on them in an auction alongside identical expert-assembled boxes.
The Decoy Effect: How a Third Option Changes Which of Two You Choose
The Economist offered three subscription options: digital-only for $59, print-only for $125, and print-plus-digital for $125.
Choice Architecture: How the Design of Choices Determines What People Choose
When Brian Wansink rearranged a school cafeteria — putting fruit at eye level and making desserts harder to reach — fruit consumption increased by...
What Is the Peak-End Rule: Why Endings Define Experiences
The peak-end rule shows that people judge experiences by their peak moment and ending, not their average. Learn the research and how to design better experiences.
What Is Cognitive Bias: How Your Brain Misleads You
Cognitive biases are systematic errors in thinking that cause people to make irrational judgments, often without realizing it, affecting decisions...
Hyperbolic Discounting: Why the Present Always Wins
Richard Thaler found that people prefer $15 now over $20 in a month — but are indifferent between $15 in a year and $20 in 13 months.
What Is the Status Quo Bias
Status quo bias is our tendency to prefer the current state of affairs over change. Learn about Samuelson and Zeckhauser's research, loss aversion, and how to overcome it.
November 2024
Choice Overload: When More Options Produce Fewer Decisions
At Draeger's grocery store in 1995, a display of 24 jams attracted 60% of passing shoppers. A display of 6 jams attracted 40%.
The Endowment Effect: Why We Overvalue What We Own
In 1990, Kahneman, Knetsch and Thaler randomly gave Cornell students a coffee mug. Sellers demanded a median $7.12 to give it up.
The Overconfidence Effect: Why the Smartest People Are Often the Most Wrong
In 1998, Long-Term Capital Management — run by two Nobel laureates and a team of PhDs — lost $4.6 billion in under four months.
The Framing Effect: Why the Same Fact Can Produce Opposite Decisions
In Kahneman and Tversky's 1981 experiment, 72% of people chose the option that saved 200 lives.
The Optimism Bias: Why the Human Brain Is Wired to Expect the Best
In 1957, the Sydney Opera House was estimated at £3.5 million, to be completed by 1963. Final cost: AUD $102 million. Completed: 1973.
The Gambler's Fallacy: Why the Mind Insists the Universe Keeps Score
On August 18, 1913, a Monte Carlo roulette wheel hit black 26 consecutive times. Gamblers lost millions betting on red, certain it was 'due.' The...
The Anchoring Bias: How the First Number You Hear Colonizes Your Mind
In 1974, Kahneman and Tversky spun a rigged wheel in front of subjects — who knew it was rigged — and it still bent their estimates.
The Sunk Cost Fallacy
In 1965, Britain privately knew Concorde would never turn a profit. The development costs were already sunk. The project continued for another decade. The sunk cost fallacy: why we continue failing projects, relationships, and wars because of what we have already spent — and why stopping feels like waste even when continuing creates far more of it.
Loss Aversion: Why Losing $100 Hurts More Than Winning $150
Kahneman and Tversky's 1979 prospect theory established that losses loom roughly 2 to 2.5 times larger than equivalent gains in subjective weight. Most people refuse a coin flip where they win $150 if heads and lose $100 if tails — despite a positive expected value. Loss aversion shapes housing markets, sports decisions, financial portfolios, and why we stay in bad situations far longer than rational calculation would predict.
Regression to the Mean: The Statistical Force That Rewrites History
Israeli Air Force flight instructors were certain punishment worked better than praise — every time they praised a good flight, the next was worse.
October 2024
Opportunity Cost: The Price of Every Choice
Opportunity cost is the value of the best alternative you give up. Decca Records turned down the Beatles to save on travel. Kodak invented the digital camera and didn't sell it. Why humans systematically ignore the most important cost in every decision.
August 2024
Why Humans Cooperate: The Evolutionary and Game-Theory Foundations
Why do humans cooperate at unprecedented scales? The science of kin selection, reciprocal altruism, Axelrod's tournaments, altruistic punishment,...
March 2024
How Poverty Traps Work: The Economics of Being Stuck
How do poverty traps work? Explore the cognitive bandwidth research, S-curve growth models, microfinance evidence, the graduation approach, and...
January 2024
The Scarcity Principle: Why We Want What We Can't Have
The Scarcity Principle explains why limited availability makes things more desirable — and why this effect is so reliably exploited in marketing,...
December 2023
Why Smart People Make Bad Financial Decisions: The Psychology of Money
Smart people make terrible financial decisions all the time. Behavioral economics explains the cognitive biases — loss aversion, present bias,...
What Is Game Theory? Strategy, Equilibrium, and Why People
Game theory is the mathematical study of strategic interaction. From the Prisoner's Dilemma to nuclear deterrence, this explainer covers Nash equilibria, cooperation, auctions, signaling, and why the theory changed economics, biology, and political science.
What Is Behavioral Economics? How Psychology Overturned the
Behavioral economics combines psychology and economics to explain how people actually make decisions. This explainer covers prospect theory, loss aversion, nudge theory, cognitive biases, and why the rational actor model was wrong.
November 2023
How to Think About Money: The Psychology of Financial Decisions
Why smart people make bad financial decisions, and what behavioral economics, psychology, and decades of research reveal about how to think about...
The Most Important Cognitive Biases and How They Affect Your Thinking
Cognitive biases are systematic errors in reasoning identified by Kahneman, Tversky, and decades of research.
How to Save Money Effectively: What Behavioral Science Says Actually Works
A research-backed guide to saving money effectively: the behavioral science of present bias, automatic savings, the 50/30/20 rule, zero-based...
October 2023
The Psychology of Money and Spending: Why We Make Irrational Financial Decisions
Mental accounting, the pain of paying, loss aversion, and the cashless effect explain why smart people make terrible financial decisions.
August 2023
The Planning Fallacy: Why Projects Always Take Longer Than Expected
Daniel Kahneman was part of a team writing a psychology curriculum. They predicted it would take 2 years.
January 2023
What Is Behavioral Science: How It Shapes Policy and Products
Behavioral science studies why people act as they do, revealing the gap between rational models and real decisions.
December 2022
What Is Psychological Ownership: Why We Feel Things Are Ours
Psychological ownership explains why we feel things belong to us even without legal title. Learn how it drives the endowment effect, IKEA effect,...
What Is Inflation Psychology: How Rising Prices Change Behavior
How inflation changes behavior, expectations, and trust — covering money illusion, panic buying, wage-price spirals, and the self-fulfilling...
What Is the Bandwagon Effect in Finance and Politics
The bandwagon effect explains why people follow the crowd even against their own judgment. Explore its role in markets, elections, and how to...
What Is Bounded Rationality: How We Make Decisions With Limited Information
Herbert Simon's bounded rationality explains why humans satisfice rather than optimize. Learn about cognitive limits, heuristics as rational...
What Is the Winner's Curse: Why Winning Auctions Can Lose Money
The winner's curse explains why the highest bidder often overpays. Learn how it affects M&A deals, IPOs, talent bidding wars, and how to avoid it.
What Is Game Theory? Strategy, Equilibrium, and Why People Cooperate
Game theory is the mathematical study of strategic interaction. From the Prisoner's Dilemma to nuclear deterrence, this explainer covers Nash...
November 2022
What Is Behavioral Economics? How Psychology Overturned the Rational Actor
Behavioral economics combines psychology and economics to explain how people actually make decisions.
The Sunk Cost Fallacy: Why Past Investment Makes Us Double Down on Bad Decisions
Britain and France had signed a treaty to build the Concorde supersonic jet in 1962. By 1968 it was clear the aircraft would never be commercially...
What Is Moral Hazard: When Protection Creates Risk
Moral hazard occurs when protection from consequences encourages riskier behavior. Learn its origins, real-world examples, and how to design...
How to Think About Risk: A Practical Framework
A practical framework for thinking about risk: expected value vs utility, availability heuristic, tail risks, diversification, and the Kelly...
How to Build a Budget That Actually Works
Learn how to build a budget that works using the 50/30/20 rule, zero-based budgeting, and envelope method — plus the behavioral science of why...
October 2022
What Is Price Anchoring: How the First Number Changes Everything
Price anchoring is the cognitive bias where the first number you see shapes all subsequent judgments of value.
What Is the Status Quo Bias: Why We Prefer What Already Exists
Status quo bias is our tendency to prefer the current state of affairs over change. Learn about Samuelson and Zeckhauser's research, loss...
September 2022
What Is the Principal-Agent Problem and Why It Matters
The principal-agent problem occurs when someone acts on your behalf but has different incentives.
What Is Asymmetric Information: When One Side Knows More
Asymmetric information occurs when one party in a transaction knows more than the other. Learn Akerlof's lemons market, adverse selection, moral...
August 2022
What Is the Paradox of Choice: When More Options Make Us Worse Off
The paradox of choice argues more options lead to worse decisions and less satisfaction. Learn Schwartz's jam study, replication issues, and when...
July 2022
What Is the Hot Hand Fallacy: When Streaks Are Illusions
The hot hand fallacy describes the belief that a player on a streak is more likely to succeed again. But is it really a fallacy?
What Is Narrative Economics: How Stories Move Markets
Nobel laureate Robert Shiller argues that economic narratives spread like viruses and drive market booms and busts. Learn how stories shape economies.
What Is the Default Effect: Why Pre-Selected Options Win
The default effect shows that pre-selected options are chosen far more often than alternatives.
May 2022
Loss Aversion: Why Losing $100 Hurts More Than Winning $150 Feels Good
Kahneman and Tversky's 1979 prospect theory established that losses loom roughly 2 to 2.5 times larger than equivalent gains in subjective weight.