Does Paying With Cash Make You Spend Less? What 392 Studies Actually Found
In 2001, two MIT researchers ran an auction for Boston Celtics tickets and found that bidders told to pay by credit card bid roughly twice…
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Framing Effect Pricing Psychology: Why Knowing About It Doesn’t Protect Your Wallet (2026)
In 1981, two psychologists handed 307 people a choice between two public health programs. The programs were mathematically identical. Depending on which set of sentences…
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Confirmation Bias Investing: Why More Research Makes You More Certain and Less Right
Over the ten years ending December 2024, the average dollar invested in U.S. mutual funds and ETFs earned 7.0% a year while the funds themselves…
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Overconfidence Bias Stock Picking: Why Doing Your Own Research Makes It Worse
Between 1991 and 1996, the households that traded most actively in their brokerage accounts earned 11.4% a year. The market returned 17.9% over the same…
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How to Stop Impulse Buying Online: The 6-Step Friction System That Cuts Unplanned Spending in 30 Days (2026)
Pull up your card statement from the last 90 days and count the online purchases you can no longer name. If the number crosses ten,…
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How Loss Aversion Affects Budgeting: The Contrarian Case for Redesigning Around Your Bias (Not Overriding It) in 2026
The standard behavioral-finance take is that loss aversion is a bug in your budgeting brain — a distortion that makes you cling to bad subscriptions,…
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Status Quo Bias Financial Decisions: 4 Costly Myths About ‘Just Leaving It Alone’ (2026)
The average household leaves an estimated $3,000 to $8,000 a year on the table not because of bad decisions — but because they never make…
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Gambler’s Fallacy Investing Mistakes: A Case Study on the $18,600 ‘It’s Due for a Bounce’ Trade (2026)
A stock in your portfolio drops five trading days in a row. The little voice in your head whispers, “It has to bounce tomorrow —…
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Present Bias Retirement Contributions: Why the ‘15% Rule’ Fails Most Savers (and What Actually Works in 2026)
Personal finance media loves a clean number: “Just save 15% of your income starting in your 20s and you’ll retire comfortably.” The math is real….
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Mental Accounting Tax Refund Spending: Why Your Brain Treats a $3,275 Windfall Differently (and How to Fix It in 2026)
The IRS issued 78.1 million refunds by early April 2026, worth a combined $265.2 billion — up 16% year over year, according to the Tax…
