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"A taxonomy of financial folly."--The New Yorker

"Ariely's book addresses some weighty issues . . . with an unexpected dash of humor."--Entertainment Weekly

"Ariely's intelligent, exuberant style and thought-provoking arguments make for a fascinating, eye-opening read."--Publishers Weekly

"In creative ways, author Dan Ariely puts rationality to the test. . . . New experiments and optimistic ideas tumble out of him, like water from a fountain."--Boston Globe

"Inventive. . . . An accessible account. . . . Ariely is a more than capable storyteller . . . If only more researchers could write like this, the world would be a better place."--Financial Times

"Surprisingly entertaining. . . . Easy to read. . . . Ariely's book makes economics and the strange happenings of the human mind fun."--USA Today

"Sly and lucid. . . . Predictably Irrational is a far more revolutionary book than its unthreatening manner lets on."--New York Times Book Review

"A delightfully brilliant guide to our irrationality--and how to overcome it--in the marketplace and everyplace."--Geoffrey Moore, author of Crossing the Chasm and Dealing with Darwin

"A fascinating romp through the science of decision-making that unmasks the ways that emotions, social norms, expectations, and context lead us astray."--Time magazine

"A marvelous book that is both thought provoking and highly entertaining, ranging from the power of placebos to the pleasures of Pepsi. Ariely unmasks the subtle but powerful tricks that our minds play on us, and shows us how we can prevent being fooled."--Jerome Groopman, New York Times bestselling author of How Doctors Think

"After reading this book, you will understand the decisions you make in an entirely new way."--Nicholas Negroponte, founder of MIT's Media Lab and founder and chairman of the One Laptop per Child non-profit association

"An entertaining tour of the many ways people act against their best interests, drawing on Ariely's own ingeniously designed experiments. . . . Personal and accessible."--BusinessWeek

"Dan Ariely is a genius at understanding human behavior: no economist does a better job of uncovering and explaining the hidden reasons for the weird ways we act, in the marketplace and out. PREDICTABLY IRRATIONAL will reshape the way you see the world, and yourself, for good."--James Surowiecki, author of The Wisdom of Crowds

"Dan Ariely's ingenious experiments explore deeply how our economic behavior is influenced by irrational forces and social norms. In a charmingly informal style that makes it accessible to a wide audience, PREDICTABLY IRRATIONAL provides a standing criticism to the explanatory power of rational egotistic choice."--Kenneth Arrow, Nobel Prize in Economics 1972, Professor of Economics Stanford University

"Freakonomics held that people respond to incentives, perhaps in undesirable ways, but always rationally. Dan Ariely shows you how people are deeply irrational, and predictably so."--Chip Heath, Co-Author, Made to Stick, Professor, Stanford Graduate School of Business

"Predictably Irrational is an important book. Full of valuable and entertaining insights that will make an impact on your business, professional, and personal life."--Jack M Greenberg, Chairman, Western Union Company, Retired Chairman and CEO, McDonald's Corporation

"Predictably Irrational is clever, playful, humorous, hard hitting, insightful, and consistently fun and exciting to read."--Paul Slovic, Founder and President, Decision Research

"PREDICTABLY IRRATIONAL is a charmer-filled with clever experiments, engaging ideas, and delightful anecdotes. Dan Ariely is a wise and amusing guide to the foibles, errors, and bloopers of everyday decision-making."--Daniel Gilbert, Professor of Psychology, Harvard University and author of Stumbling on Happiness

"PREDICTABLY IRRATIONAL is a scientific but imminently readable and decidedly insightful look into why we do what we do every day...and why, even though we 'know better, ' we may never change."--Wenda Harris Millard, President, Media, Martha Stewart Living Omnimedia

"PREDICTABLY IRRATIONAL is wildly original. It shows why--much more often than we usually care to admit--humans make foolish, and sometimes disastrous, mistakes. Ariely not only gives us a great read; he also makes us much wiser."--George Akerlof, Nobel Laureate in Economics, 2001 Koshland Professor of Economics, University of California at Berkeley

"The most difficult part of investing is managing your emotions. Dan explains why that is so challenging for all of us, and how recognizing your built-in biases can help you avoid common mistakes."--Charles Schwab, Chairman and CEO, The Charles Schwab Corporation

"This is a wonderful, eye-opening book. Deep, readable, and providing refreshing evidence that there are domains and situations in which material incentives work in unexpected ways. We humans are humans, with qualities that can be destroyed by the introduction of economic gains. A must read!"--Nassim Nicholas Taleb, New York Times bestselling author of The Black Swan: The Impact of the Highly Improbable

Introduction How an Injury Led Me to Irrationality and to the Research Described Here

Ch. 1 The Truth about Relativity: Why Everything Is Relative - Even When It Shouldn't Be

Ch. 2 The Fallacy of Supply and Demand: Why the Price of Pearls - and Everything Else - Is Up in the Air

Ch. 3 The Cost of Zero Cost: Why We Often Pay Too Much When We Pay Nothing

Ch. 4 The Cost of Social Norms: Why We Are Happy to Do Things, but Not When We Are Paid to Do Them

Ch. 5 The Influence of Arousal: Why Hot Is Much Hotter Than We Realize

Ch. 6 The Problem of Procrastination and Self-Control: Why We Can't Make Ourselves Do What We Want to Do

Ch. 7 The High Price of Ownership: Why We Overvalue What We Have

Ch. 8 Keeping Doors Open: Why Options Distract Us from Our Main Objective

Ch. 9 The Effect of Expectations: Why the Mind Gets What It Expects

Ch. 10 The Power of Price: Why a 50-Cent Aspirin Can Do What a Penny Aspirin Can't

Ch. 11 The Context of Our Character, Part I: Why We Are Dishonest, and What We Can Do about It

Ch. 12 The Context of Our Character, Part II: Why Dealing with Cash Makes Us More Honest

Ch. 13 Contst of Our Charcater

Ch. 14 Beer and Free Lunches

Ch. 15 Beer and Free Lunches

Reflections and Anecdotes about Some of the Chapters

Thoughts about the Subprime Mortgage Crisis and Its Consequences

Thanks

List of Collaborators

Notes

Bibliography and Additional Readings

Index

A marvelous book... thought provoking and highly entertaining. --Jerome Groopman, New York Times bestselling author of How Doctors Think

"An important book. Full of valuable and entertaining insights that will make an impact on your business, professional, and personal life." -- Jack M Greenberg, Chairman, Western Union Company, Retired Chairman and CEO, McDonald's Corporation

Why do our headaches persist after we take a one-cent aspirin but disappear when we take a fifty-cent aspirin? Why do we splurge on a lavish meal but cut coupons to save twenty-five cents on a can of soup?

When it comes to making decisions in our lives, we think we're making smart, rational choices. But are we? In this newly revised and expanded edition of the groundbreaking New York Times bestseller, Dan Ariely refutes the common assumption that we behave in fundamentally rational ways. From drinking coffee to losing weight, from buying a car to choosing a romantic partner, we consistently overpay, underestimate, and procrastinate. Yet these misguided behaviors are neither random nor senseless. They're systematic and predictable--making us predictably irrational.

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