You’re About to Make a Terrible Mistake!

Olivier Sibony

‘A masterful introduction to the state of the art in managerial decision-making. Surprisingly, it is also a pleasure to read’ – Daniel Kahneman, author of Thinking, Fast and Slow

A lively, research-based tour of nine common decision-making traps – and practical tools for avoiding them – from a professor of strategic thinking We make decisions all the time. It’s so natural that we hardly stop to think about it. Yet even the smartest and most experienced among us make frequent and predictable errors. So, what makes a good decision? Should we trust our intuitions, and if so, when? How can we avoid being tripped up by cognitive biases when we are not even aware of them?

You’re About to Make a Terrible Mistake! offers clear and practical advice that distils the latest developments in behavioural economics and cognitive psychology into actionable tools for making clever, effective decisions in business and beyond.


ISBN: 9781800750333

Published: July 1, 2021


ISBN: 9781800750012

Published: September 3, 2020


Reviews for You’re About to Make a Terrible Mistake!

‘A masterful introduction to the state of the art in managerial decision making’ – Daniel Kahneman, Thinking, Fast and Slow

I loved it‘ – Angela Duckworth, Grit

‘An elegant synthesis of the best scientific work on human judgment’ – Philip E. Tetlock, Superforecasting

‘Sibony has written the best, funniest, most useful guide to cognitive bias in business’ – Safi Bahcall, Loonshots

‘Sibony has that rare and magical ability to take complex concepts and package them in fast-paced, easy-to-understand narrative’ – Annie Duke, Thinking in Bets

Brilliant, fun, and wise– a tremendous guide to sensible decision-making, in business and in daily life. Filled with vivid stories and big lessons, this book might well be the best investment you make this year’ – Cass R. Sunstein, co-author of Nudge


Olivier Sibony

Olivier Sibony is an Affiliate Professor of Strategy at HEC Paris and an Associate Fellow at Saïd Business School, Oxford University. Previously, he spent 25 years in the Paris and New York offices of McKinsey & Company, where he was a senior partner. Sibony’s research on improving the quality of strategic decision making has been featured in many publications, including Harvard Business Review and MIT Sloan Management Review. He is a graduate of HEC Paris and hold a PhD from Paris Sciences et Lettres University. He is a co-author, with Daniel Kahneman, of the forthcoming Noise.