Many of our most urgent national problems suggest a widespread lack of concern for the future. Alarming economic conditions, such as low national savings rates, declining corporate investment in long-term capital projects, and ballooning private and public debt are matched by such social ills as diminished educational achievement, environmental degradation, and high rates of infant mortality, crime, and teenage pregnancy. At the heart of all these troubles lies an important behavioral phenomenon: in the role of consumer, manager, voter, student, or parent, many Americans choose inferior but immediate rewards over greater long-term benefits. Choice Over Time offers a rich sampling of original research on intertemporal choice—how and why people decide between immediate and delayed consequences—from a broad range of theoretical and methodological perspectives in philosophy, political science, psychology, and economics. George Loewenstein, Jon Elster, and their distinguished colleagues review existing theories and forge new approaches to understanding significant questions: Why do people seem to "discount" future benefits? Do individuals use the same decision-making strategy in all aspects of their lives? What part is played by situational factors such as the certainty of delayed consequences? How are decisions affected by personal factors such as willpower and taste? In addressing these issues, the contributors to Choice Over Time address many social, economic, psychological, and personal time problems. Their work demonstrates the predictive power of short-term preferences in behavior as varied as addiction and phobia, the effect of prices on consumption, and the dramatic rise in debt and decline in savings. Choice Over Time provides an essential source for the most recent research and theory on intertemporal choice, offering new models for time preference patterns—and their aberrations—and presenting a diversity of potential solutions to the problem of "temporal myopia."

Philosophers have long tussled over whether moral judgments are the products of logical reasoning or simply emotional reactions. From Jane Austen's Sense and Sensibility to the debates of modern psychologists, the question of whether feeling or sober rationality is the better guide to decision making has been a source of controversy. In Do Emotions Help or Hurt Decision Making? Kathleen Vohs, Roy Baumeister, and George Loewenstein lead a group of prominent psychologists and economists in exploring the empirical evidence on how emotions shape judgments and choices. Researchers on emotion and cognition have staked out many extreme positions: viewing emotions as either the driving force behind cognition or its side effect, either an impediment to sound judgment or a guide to wise decisions. The contributors to Do Emotions Help or Hurt Decision Making? provide a richer perspective, exploring the circumstances that shape whether emotions play a harmful or helpful role in decisions. Roy Baumeister, C. Nathan DeWall, and Liqing Zhang show that while an individual's current emotional state can lead to hasty decisions and self-destructive behavior, anticipating future emotional outcomes can be a helpful guide to making sensible decisions. Eduardo Andrade and Joel Cohen find that a positive mood can negatively affect people's willingness to act altruistically. Happy people, when made aware of risks associated with altruistic acts, become wary of jeopardizing their own well-being. Benoît Monin, David Pizarro, and Jennifer Beer find that whether emotion or reason matters more in moral evaluation depends on the specific issue in question. Individual characteristics often mediate the effect of emotions on decisions. Catherine Rawn, Nicole Mead, Peter Kerkhof, and Kathleen Vohs find that whether an individual makes a decision based on emotion depends both on the type of decision in question and the individual's level of self-esteem. And Quinn Kennedy and Mara Mather show that the elderly are better able to regulate their emotions, having learned from experience to anticipate the emotional consequences of their behavior. Do Emotions Help or Hurt Decision Making? represents a significant advance toward a comprehensive theory of emotions and cognition that accounts for the nuances of the mental processes involved. This landmark book will be a stimulus to scholarly debates as well as an informative guide to everyday decisions.

How do people decide whether to sacrifice now for a future reward or to enjoy themselves in the present? Do the future gains of putting money in a pension fund outweigh going to Hawaii for New Year's Eve? Why does a person's self-discipline one day often give way to impulsive behavior the next? Time and Decision takes up these questions with a comprehensive collection of new research on intertemporal choice, examining how people face the problem of deciding over time. Economists approach intertemporal choice by means of a model in which people discount the value of future events at a constant rate. A vacation two years from now is worth less to most people than a vacation next week. Psychologists, on the other hand, have focused on the cognitive and emotional underpinnings of intertemporal choice. Time and Decision draws from both disciplinary approaches to provide a comprehensive picture of the various layers of choice involved. Shane Frederick, George Loewenstein, and Ted O'Donoghue introduce the volume with an overview of the research on time discounting and focus on how people actually discount the future compared to the standard economic model. Alex Kacelnik discusses the crucial role that the ability to delay gratification must have played in evolution. Walter Mischel and colleagues review classic research showing that four year olds who are able to delay gratification subsequently grow up to perform better in college than their counterparts who chose instant gratification. The book also delves into the neurobiology of patience, examining the brain structures involved in the ability to withstand an impulse. Turning to the issue of self-control, Klaus Wertenbroch examines the relationship between consumption and available resources, showing, for example, how a high credit limit can lead people to overspend. Ted O'Donoghue and Matthew Rabin show how people's awareness of their self-control problems affects their decision-making. The final section of the book examines intertemporal choice with regard to health, drug addiction, dieting, marketing, savings, and public policy. All of us make important decisions every day-many of which profoundly affect the quality of our lives. Time and Decision provides a fascinating look at the complex factors involved in how and why we make our choices, so many of them short-sighted, and helps us understand more precisely this crucial human frailty.