Common Decision Traps and How to Avoid Them
Common traps include confirmation bias, sunk cost fallacy, analysis paralysis, and groupthink that lead to poor choices despite good intentions.
All Decision Making Articles
Welcome to the complete index of every article in our Decision Making collection on When Notes Fly. This page lists all 78 articles in the section, organized alphabetically for easy reference. Each piece is researched, written by hand, and grounded in academic sources, professional practice, or empirical data. Whether you are diving into Decision Making for the first time or returning to find a specific article, the index below gives you direct access to the full collection within Concepts.
If you are new to Decision Making, we recommend starting with the foundational explainers and definitions before moving on to specific case studies, applied frameworks, and deeper analytical pieces. Articles are written for thoughtful readers who want substance over summary, with clear explanations of how ideas connect, where they come from, and why they matter. Use this index as a navigational map: skim the titles, read the short summaries, and click through to the pieces that draw your interest. Each article also links to related material so you can follow a thread of ideas across our entire Concepts library.
Browse All Decision Making Articles
Decision Fatigue Explained and How to Avoid It
Making many decisions depletes mental energy, leading to worse choices later. Reduce decision fatigue through routines, defaults, and strategic timing.
Decision Frameworks Used by High Performers to Think Clearly
Top performers use frameworks like regret minimization and the reversibility test—not harder thinking. Learn to cut through decision noise consistently.
Decision Journaling
Decision journaling is the practice of recording your reasoning at the time of a decision and reviewing outcomes later. The most practical method for identifying and correcting systematic biases in your own thinking.
How Credit Scores Work
A complete guide to how credit scores work: FICO score factors and weights, credit utilization strategy, building credit from scratch, error rates in credit reports, VantageScore, credit bureaus, hard vs soft inquiries, and fixing bad credit.
How Wealthy People Think Differently About Money and Risk
Research-backed analysis of wealth mindset differences: how high-net-worth individuals actually think about money, risk, time, and opportunity — and what the evidence shows about building wealth.
How to Build Credit: A Complete Guide
Learn how to build credit from scratch or repair damaged credit using secured cards, credit-builder loans, and the authorized user strategy. Covers FICO score factors.
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 budgets fail.
How to Build an Emergency Fund: The Why and How
An emergency fund of 3-6 months of expenses is the foundation of financial stability. Learn where to keep it, how to build it on any income, and what actually counts as an emergency.
How to Make Better Decisions Under Uncertainty
Most important decisions happen under uncertainty. Learn expected value thinking, pre-mortems, base rates, and Jeff Bezos's Type 1 vs Type 2 framework.
How to Make Better Decisions Under Uncertainty
Most important decisions happen under uncertainty. Learn expected value thinking, pre-mortems, base rates, and Jeff Bezos's Type 1 vs Type 2 framework.
How to Read a Financial Statement
Learn how to read financial statements: what the income statement, balance sheet, and cash flow statement each show, key ratios to look for, and what red flags to spot.
How to Save Money Effectively
A research-backed guide to saving money effectively: the behavioral science of present bias, automatic savings, the 50/30/20 rule, zero-based budgeting, sinking funds, high-yield savings accounts, and what the data actually shows works.
How to Start Investing
A research-backed guide to investing for beginners: index funds, asset allocation, compound interest, dollar-cost averaging, tax-advantaged accounts, and the behavioral mistakes that cost ordinary investors the most.
How to Think About Money
Why smart people make bad financial decisions, and what behavioral economics, psychology, and decades of research reveal about how to think about money differently.
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 criterion explained clearly.
Index Funds vs Individual Stocks: What the Evidence Says
Index funds vs individual stocks — the performance data, expense ratios, diversification math, and what most investors should actually do with their money.
Is a College Degree Worth It in 2026?
A data-driven look at whether a college degree still pays off in 2026 — ROI by major, earnings premium vs student debt, and when alternatives actually make more sense.
Mental Models That Make Every Decision Sharper
Second-order thinking, inversion, and first principles expose what you're missing. The right mental model turns a hard decision into an obvious one. Here's how.
Pre-Mortem Analysis
Pre-mortem analysis is a prospective technique that imagines a project has already failed and works backward to identify causes. Gary Klein's method for surfacing hidden risks before they become real problems.
Probabilistic Thinking: How Better Decisions Are Made
Probabilistic thinking means thinking in likelihoods rather than absolutes. Assign probabilities to outcomes to make better decisions under uncertainty.
Reference Class Forecasting
Reference class forecasting ignores your specific plan and uses historical outcomes of similar projects to predict what will actually happen. The most empirically validated method for correcting optimism bias in estimation.
Renting vs Buying a Home: What the Numbers Actually Say
The rent vs buy debate settled with math — price-to-rent ratios, the 5% rule, opportunity cost of a down payment, and when buying genuinely makes financial sense.
Risk vs Uncertainty: What People Confuse
Risk has known probabilities; uncertainty doesn't. With risk you can calculate odds, with uncertainty you can't even assign probabilities to outcomes.
Second-Order Thinking Explained with Examples
Second-order thinking asks 'and then what?' to consider consequences beyond the obvious. Free shipping increases sales but erodes margins over time.
Second-Order Thinking Explained with Examples
Second-order thinking asks not just "what happens next?" but "what happens after that?" The mental model Howard Marks calls essential for investors, leaders, and anyone making important decisions.
The Regret Minimization Framework
The regret minimization framework is Jeff Bezos's decision-making method: project yourself to age 80 and ask which choice you will regret not having made. A systematic approach to overcoming short-term fear in long-term decisions.
The Sunk Cost Fallacy
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 viable. They kept going anyway — pouring £1.3 billion into a plane that would carry 100 passenger...
The Sunk Cost Fallacy
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 viable. They kept going anyway — pouring £1.3 billion into a plane that would carry 100 passenger...
What Is Antitrust Law?
A complete guide to antitrust law: from Standard Oil and the Sherman Act through the Chicago School debate, big tech cases, the EU Digital Markets Act, and the neo-Brandeisian revival.
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.
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.
What Is Behavioral Finance? When Markets Meet Psychology
Behavioral finance explains how psychological biases distort investment decisions and market prices. From Kahneman and Tversky's prospect theory to nudge design and the 2008 crisis, here is what the research shows.
What Is Civil Society?
A comprehensive guide to civil society: its philosophical origins from Aristotle to Gramsci, Tocqueville's voluntary associations, Putnam's social capital, NGOs, digital organizing, and the paradox of foreign-funded advocacy.
What Is Communism? Marx, Revolution, and the Experiment
A comprehensive guide to communism covering Marxist theory, Leninism and Stalinism, the Soviet Union, Maoist China, Cuba, and the ongoing debates about why communism failed and what, if anything, remains of its ideas.
What Is Communism? Marx, Revolution, and the Experiment
A comprehensive guide to communism covering Marxist theory, Leninism and Stalinism, the Soviet Union, Maoist China, Cuba, and the ongoing debates about why communism failed and what, if anything, remains of its ideas.
What Is Compound Interest and How Does It Work
Compound interest explained: the math, the Rule of 72, and real examples showing why starting early beats saving more later. Includes tables and calculations.
What Is Critical Thinking: How to Reason More Clearly
Critical thinking is the ability to analyze information objectively, evaluate arguments carefully, and reach well-reasoned conclusions rather than accepting claims at face value.
What Is Debt: Good Debt vs Bad Debt Explained
Not all debt is equal. Understand how interest works, what separates good debt from bad debt, and when borrowing is a tool vs a trap.
What Is Decision Making Under Uncertainty?
Decision making under uncertainty means choosing when you don't know all outcomes or probabilities. Use probabilistic thinking and scenarios.
What Is Exponential Growth and Why Our Brains Struggle With
Exponential growth compounds on itself, doubling repeatedly. Learn why humans instinctively think linearly, how the chessboard problem illustrates exponentials, and how to reason better about them.
What Is Financial Independence: The FIRE Movement Explained
A thorough explanation of financial independence and the FIRE movement: the 4 percent rule, FI number calculation, Lean FIRE, Fat FIRE, Barista FIRE, Coast FIRE, sequence of returns risk, and what the research says about early retirement and life ...
What Is Fiscal Policy?
Fiscal policy is how governments use taxation and spending to manage the economy. Learn about Keynesian multipliers, austerity debates, automatic stabilizers, and why fiscal decisions are so contested.
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 politica...
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 politica...
What Is Inflation and How Does It Affect Your Money
Inflation explained: how CPI and PCE measure it, the difference between real and nominal returns, how inflation erodes purchasing power, and major historical events.
What Is International Trade Theory?
International trade theory explains why nations trade, who benefits, and who loses. From Ricardo's comparative advantage to Krugman's New Trade Theory and the China shock, explore the economics and politics of global exchange.
What Is Keynesian Economics?
Keynesian economics holds that aggregate demand drives output and employment and that government fiscal policy can stabilize economies during downturns. Explore Keynes's General Theory, the IS-LM model, stagflation, and the New Keynesian revival.
What Is Labor Economics?
Labor economics studies how wages are determined, why workers get paid what they do, and how labor markets function. Explore human capital theory, the gender pay gap, minimum wage research, union decline, and the effects of automation.
What Is Long-Term Thinking and Why It's So Hard
Long-term thinking means weighing future consequences as seriously as immediate ones. Learn why our brains resist it and the frameworks that help overcome that bias.
What Is Microeconomics?
A complete guide to microeconomics: consumer and producer theory, market structures, externalities, information asymmetry, public goods, and key research from Coase to Kahneman to Claudia Goldin.
What Is Money? How Currency, Credit, and Trust Run the
Money is one of humanity's most consequential inventions. This guide covers the history of money from Mesopotamian clay tablets to cryptocurrency, how money is created by banks, what gives it value, and what Modern Monetary Theory claims.
What Is Money? How Currency, Credit, and Trust Run the
Money is one of humanity's most consequential inventions. This guide covers the history of money from Mesopotamian clay tablets to cryptocurrency, how money is created by banks, what gives it value, and what Modern Monetary Theory claims.
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 incentives that prevent it.
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 Opportunity Cost
Opportunity cost is what you give up when you choose one option over another. Learn why it's the foundation of economic thinking and better decisions.
What Is Passive Income
A clear-eyed look at passive income: the myth versus reality, Robert Kiyosaki's influence, the IRS definition, dividend investing, rental property, REITs, digital products, affiliate marketing, and the wealth thresholds needed to live off passive ...
What Is Personal Finance: The Fundamentals Everyone Needs
Personal finance fundamentals explained: budgeting, saving, investing, debt, insurance, and estate planning — with financial literacy statistics and common mistakes by life stage.
What Is Political Philosophy? Power, Justice, and the
Political philosophy asks what justifies state power, what justice requires, and how free societies should be organized. From Plato and Hobbes to Rawls, Nozick, and Habermas, here is a complete guide to the field.
What Is Political Philosophy? Power, Justice, and the
Political philosophy asks what justifies state power, what justice requires, and how free societies should be organized. From Plato and Hobbes to Rawls, Nozick, and Habermas, here is a complete guide to the field.
What Is Sustainable Investing (ESG)
ESG investing screens companies on environmental, social, and governance factors. Learn how it works, whether it outperforms, and the serious criticisms it faces.
What Is Value Investing
Value investing means buying stocks worth more than their price. Learn Graham's intrinsic value concept, Buffett's adaptations, and whether the value premium still exists.
What Is Wealth Inequality: Causes, Data, and Debate
What is wealth inequality? The Gini coefficient, Piketty's r > g thesis, wealth vs income data, top 1% statistics, what drives inequality, and the policy debate explained.
What Is Welfare Economics
Welfare economics asks how to measure and improve societal wellbeing. Learn about Pareto efficiency, Kaldor-Hicks, the Easterlin paradox, and happiness research.
What Is Welfare Economics
Welfare economics asks how to measure and improve societal wellbeing. Learn about Pareto efficiency, Kaldor-Hicks, the Easterlin paradox, and happiness research.
What Is a Recession and How Does It Affect You
A recession is a significant decline in economic activity lasting more than a few months. Learn the NBER definition, leading indicators, historical examples, and how to prepare financially.
What Is an Index Fund and Why Most Investors Should Use One
An index fund tracks a market index at minimal cost. Backed by decades of SPIVA data and Nobel Prize research, learn why passive investing beats most active strategies.
What Is the Availability Bias in Investing
The availability bias causes investors to overweight recent dramatic events. Learn how it distorts portfolio decisions and how to counteract it with evidence-based strategies.
What Is the Cobra Effect in Finance
How financial risk management tools — portfolio insurance, VaR, securitization — created the crises they were designed to prevent. The cobra effect in finance.
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. Learn classic examples, moral hazard, adverse selection, and mechanism design.
What Is the Rule of Law?
An in-depth exploration of the rule of law: Dicey's classic formulation, thin versus thick conceptions, Magna Carta, habeas corpus, judicial independence, economic development, and contemporary backsliding in Hungary, Poland, and Turkey.
What Is the Stock Market and How Does It Work
A clear explanation of how the stock market works: exchanges, how prices are set, indices, market capitalization, and why index funds outperform most active investors.
What Is the Winner's Curse
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 the Zero-Sum Fallacy
Zero-sum thinking assumes one person's gain requires another's loss. Learn when it's accurate, when it's a fallacy, and how fixed-pie bias poisons negotiations.
When Your Gut Is Right (and When It Will Wreck You)
Kahneman and Klein agreed on two conditions that make intuition trustworthy. Miss either one and your gut is lying to you. Find out which side of the line you're on.
Why Most Decisions Fail Due to Poor Framing
Poor decision framing means asking the wrong question. 'Should I quit?' differs from 'What career maximizes growth?' Frame determines outcomes.
Why Rational Decisions Feel Emotionally Wrong
Rational decisions feel wrong because your brain evolved for survival, not optimization. Emotions trigger fast but logic requires slow deliberation.
Why Smart People Make Bad Financial Decisions
Smart people make terrible financial decisions all the time. Behavioral economics explains the cognitive biases — loss aversion, present bias, mental accounting — that override rational thinking.