🧠 Psychology of Money
Predictably Irrational
Applica Finance · Book Notes
🧠 Psychology of Money
Predictably Irrational
We're not just irrational — we're irrational in consistent, predictable ways.
Read the summary ↓Summary — what Predictably Irrational is about
Behavioural economist Dan Ariely uses playful experiments to show that our decisions are far less rational than we assume — and that our irrationality follows patterns we can learn to anticipate.
From the power of 'free', to how we overvalue what we own, to why relativity and expectations shape choices, the book reveals hidden forces behind spending, pricing and everyday behaviour.
Key lessons & takeaways
- Our choices are shaped by comparison, not absolute value.
- 'Free' triggers powerful, often irrational behaviour.
- We overvalue what we already own.
- Expectations change our actual experience.
- Understanding biases helps us design better decisions.
Chapter-by-chapter / section outline
- 1The Truth About Relativity — everything is compared
- 2The Fallacy of Supply and Demand — arbitrary anchors
- 3The Cost of Zero Cost — the pull of 'free'
- 4The Influence of Arousal and Emotion
- 5The Problem of Procrastination and Self-Control
- 6The High Price of Ownership — the endowment effect
- 7The Effect of Expectations
Who should read this book
- Anyone curious why we spend and choose the way we do.
- Marketers, investors and everyday decision-makers.
- Readers who enjoy experiments and stories.
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About these notes: This is an original educational summary written by Applica Finance to help you decide what to read and remember the core ideas. It is not a reproduction of the book. If the ideas resonate, please support the author by buying the full book.