100% Right 50% of the Time
Preventing Decision Fallacies
Yossi Yassour
- Self-Help, Business
- Behavioral Economics
- Decision Science
- Self-Improvement
The Book
We believe we’re rational actors. We trust our instincts. We make calculated choices based on facts and figures. Yet the data tells a different story: most of us are right 50% of the time, despite feeling 100% confident in our decisions.
100% Right 50% of the Time: Preventing Decision Fallacies is a comprehensive exploration of behavioral economics and decision theory designed to close the gap between how we believe we think and how we actually think. Through six thematic parts organized into dozens of focused chapters, the book systematically deconstructs the cognitive biases, heuristics, and logical fallacies that govern human decision-making – from how we miscalculate probabilities and overestimate our abilities to how emotion and intuition override rational judgment.
Drawing on decades of research from behavioral economists Daniel Kahneman and Amos Tversky, as well as contemporary work by Dan Ariely and others, Yassour synthesizes high-level academic theory with deeply personal narrative. He uses compelling real-world examples to illustrate how reference points, loss aversion, and the dual-process model of the brain shape our most important life decisions: career choices, financial investments, health screenings, and relationships.
Why This Book Matters
The behavioral economics category has experienced explosive growth over the past decade. Daniel Kahneman’s Thinking, Fast and Slow spent years on international bestseller lists, establishing proof of massive global appetite for accessible, narrative-driven books on decision science. Dan Ariely’s Predictably Irrational and Richard Thaler’s Misbehaving have similarly demonstrated that readers across professional levels hunger for frameworks that explain their own psychological blind spots.
What distinguishes 100% Right 50% of the Time from competitors is its depth, organizational clarity, and practical toolkit. While Kahneman’s work is predominantly academic in tone, Yassour’s is deliberately conversational and personal without sacrificing rigor. The book integrates over fifty scholarly citations with interactive quizzes, visual graphs, and actionable exercises – readers can calculate their own overconfidence calibration, apply verbal probability tables used by the Canadian Army, and practice mental frameworks for isolating emotion from logic.
This makes the book equally valuable to specialists seeking a comprehensive synthesis and general readers seeking self-improvement, with cross-cultural relevance already proven by its Hebrew-to-Chinese translation history.
About the Book
Genre: Behavioral Economics / Decision Science / Self-Improvement
Published Title | 61,000 Words | Six Thematic Parts
Previously published in Hebrew (2021) and translated into Chinese. Additional translation rights available – to confirm current territories with Valcal Group.
For readers of Daniel Kahneman’s Thinking, Fast and Slow, Dan Ariely’s Predictably Irrational, and Richard Thaler’s Misbehaving, 100% Right 50% of the Time offers a conversational, toolkit-driven approach to behavioral economics and decision theory.
Author
Yossi Yassour
Yossi Yassour is a professor and scholar with deep expertise in decision theory and behavioral economics. He studied under Howard Raiffa at Harvard University, one of the pioneers of modern decision analysis, and has worked extensively with the foundational research of Daniel Kahneman (Nobel Laureate in Economic Sciences) and Amos Tversky. Over decades as an academic and cross-cultural traveler, Yassour has accumulated rich firsthand experience observing how human psychology manifests across different societies and professional contexts.
Yassour’s voice is distinguished by his ability to bridge rigorous academic theory with deeply personal, humorous anecdotes. He deliberately eschews purely mathematical or dry theoretical approaches in favor of narrative accessibility, making complex behavioral concepts available to readers without specialized training.
Rights Status
Original Language: Hebrew (published 2021)
Rights Already Placed: Chinese edition (published)
Additional Translation Rights: Available
Film Rights: Available
Audio Rights: Not available
Comparable Titles
This book is suitable for readers who enjoyed:
- Thinking, Fast and Slow by Daniel Kahneman
- Predictably Irrational by Dan Ariely
- Misbehaving by Richard Thaler
BISAC Categories
- BUS061000 – Business & Economics / Decision-Making & Problem Solving
- PSY031000 – Psychology / Cognitive Psychology & Cognition
- SEL031000 – Self-Help / Personal Growth / Success
- BUS007000 – Business & Economics / Behavioral Economics
Themes
- Decision Theory
- Behavioral Economics
- Cognitive Biases
- Risk Perception
- Loss Aversion
- Probabilistic Reasoning
- Emotion & Intuition
- Self-Improvement
Keywords
For readers interested in:
- Books about behavioral economics
- Decision-making frameworks
- Cognitive bias and heuristics
- Risk and probability psychology
- Kahneman and Tversky’s research
- Self-improvement through psychology
- Business and financial decision science
FAQ
Is this book available for translation rights?
Hebrew (original), English and Chinese editions are already published. Additional language rights availability to be confirmed with Valcal Group.
Has this book been published before?
Yes – 100% Right 50% of the Time was originally published in Hebrew in 2021 and has since been published in English and Chinese.
What is the word count?
61,000 words.
What genre is this book?
Behavioral Economics / Decision Science / Self-Improvement.
Who will enjoy this book?
Business professionals and managers; financial sector readers; healthcare professionals; law and policy makers; students and academics in economics, psychology, and management; and general readers interested in behavioral science and self-improvement.
What format is available?
Published book, organized into six thematic parts and dozens of focused chapters available as Paperback, e-book and Audio book.
Rights Agent's Notes
From a rights agent’s perspective, 100% Right 50% of the Time offers something rarer than a strong pitch: a proven track record. Since its original Hebrew publication in 2021, the book has already been translated and published in Chinese, demonstrating cross-cultural appeal for its blend of rigorous behavioral economics and personal, humor-driven storytelling – a combination that has kept category leaders like Kahneman’s Thinking, Fast and Slow and Ariely’s Predictably Irrational on international bestseller lists for over a decade.
Yassour’s academic pedigree – studying under Howard Raiffa at Harvard and engaging directly with the foundational research of Kahneman and Tversky – gives the book unusual credibility, while its narrative, example-driven style keeps it accessible well beyond an academic readership. The book’s structured toolkit (calibration tests, probability tables, value functions) also gives publishers a natural hook for corporate training, executive education, and self-improvement imprints, not just general nonfiction.
We see strong fit with business, psychology, and self-improvement publishers across Europe, North America, and Asia – markets that have already demonstrated appetite for behavioral economics, and where the book’s existing translation history (Hebrew, Chinese) provides a proof point for further international acquisition.