Misbehaving by Richard Thaler: An Honest Review

📖 What is Misbehaving about?🔗

The core argument is simple: traditional economics assumes people are rational, self-interested and consistent, and Thaler spent his career proving that's wrong. Misbehaving (2015) is his account of that fight, tracing the rise of behavioural economics from the 1970s to mainstream acceptance and weaving his own career together with the ideas that drove the field. Key concepts include:

• Mental accounting: we treat money differently depending on where it came from or what mental "bucket" we put it in.
• The endowment effect: we overvalue things simply because we own them.
• Loss aversion: losing $100 hurts roughly twice as much as gaining $100 feels good.
• Self-control problems: we know what we should do and still don't do it.
• Fairness: people will reject objectively good deals if they feel unfairly treated.
• Nudges and choice architecture: small design changes in how options are presented can dramatically shift behaviour, without restricting freedom to choose.

The book also covers the Save More Tomorrow program, a real retirement savings scheme Thaler co-designed that used behavioural insights to help workers save more, automatically. Thaler won the 2017 Nobel Prize in Economic Sciences for his contributions to behavioural economics and co-wrote Nudge, which became the blueprint for the UK's "Nudge Unit" and influenced policy worldwide. This is not a personal finance how-to, it's closer to a history of ideas, told with a lot of personality.

⚖️ Strengths and weaknesses🔗

👤 Who should read it, and who should skip it?🔗

🔍 What do critics say?🔗

The professional reception was broadly positive, with some pointed reservations. Major outlets framed it as the story of how the fictional "rational economic man" went extinct, praising it as a witty, insightful and accessible account of how psychological insights entered mainstream economics. The most substantive critique characterised the book as a personal intellectual history rather than a forward-looking, balanced account of the field, arguing it underplays important predecessors and can depict rational-choice opponents unfairly. That's a fair criticism worth keeping in mind as you read.

💬 What do readers say? Goodreads and Reddit🔗

On Goodreads it holds around 4.2 out of 5 from tens of thousands of ratings, a strong result for a book that sits between memoir and academic history. Common praise: accessible, frequently hilarious, engaging anecdotes, an excellent entry point to behavioural economics. Common criticism: it reads too much like a memoir, is heavy on name-dropping, and can feel like Thaler overstates his own role in the field.

🇦🇺 The Australian angle🔗

The ideas are universal, but they map onto Australian financial life in specific ways:

• Mental accounting is everywhere here. Think how Australians treat a tax refund or a super co-contribution: intellectually it's just money, but behaviourally it feels like "bonus money", much easier to spend on a holiday than to redirect into an index fund.
• Australia's super system is basically Save More Tomorrow at national scale. The Super Guarantee forces automatic contributions before workers ever see the money, and Thaler's research showed automatic enrolment and escalation dramatically improve retirement outcomes. Understanding why it works makes you a smarter participant in your own super.
• Loss aversion explains a lot of bad investor behaviour: panic-selling in a downturn, switching super funds after a bad quarter, anchoring to a property price that no longer reflects reality. Knowing the bias doesn't make you immune, but it does make you more likely to pause before acting.
• Choice architecture matters for everyday decisions too: how your super fund presents investment options, the order your bank lists accounts, your insurance default settings. All nudges, whether intended or not, and reading this makes you a more alert consumer of them.

For the deeper, more systematic take on the same psychology, our Thinking, Fast and Slow review is the natural companion, and for the actionable Australian steps, our Barefoot Investor review is a better fit.

💰 The verdict🔗

Misbehaving is a smart, entertaining and genuinely important book. Thaler is a good writer, a funny one, and a credible authority, and the combination of memoir, intellectual history and real-world application makes for a compelling read, even if it's not a comprehensive or perfectly balanced one. The criticisms are real: it's more personal history than field history, the finance chapters could be stronger, and for nudge ethics in depth you'll need another book. But as an introduction to why humans are predictably irrational, and why that matters for money, policy and everyday decisions, it's hard to beat. Pair it with a practical Australian personal finance guide for the actionable steps and you've got a solid combination. Our rating: 4 out of 5.

❓ Frequently asked questions🔗