From the Nobel Prize-winning author of Thinking, Fast and Slow and the coauthor of Nudge, Noise: A Flaw in Human Judgment is a revolutionary exploration of why people make bad judgments and how to make better ones. Imagine that two doctors in the same city give different diagnoses to identical patients, or that two judges in the same courthouse give markedly different sentences to people who have committed the same crime. Suppose that different interviewers at the same firm make different decisions about indistinguishable job applicants, or that when a company is handling customer complaints, the resolution depends on who happens to answer the phone. Now imagine that the same doctor, the same judge, the same interviewer, or the same customer service agent makes different decisions depending on whether it is morning or afternoon, or Monday rather than Wednesday. These are examples of noise: variability in judgments that should be identical.

In Noise, Daniel Kahneman, Olivier Sibony, and Cass R. Sunstein show the detrimental effects of noise in many fields, including medicine, law, economic forecasting, forensic science, bail, child protection, strategy, performance reviews, and personnel selection. Wherever there is judgment, there is noise. Yet, most of the time, individuals and organizations alike are unaware of it. They neglect noise. With a few simple remedies, people can reduce both noise and bias, and so make far better decisions.

Packed with original ideas, and offering the same kinds of research-based insights that made Thinking, Fast and Slow and Nudge groundbreaking New York Times bestsellers, Noise explains how and why humans are so susceptible to noise in judgment—and what we can do about it.

Social Capital is a comprehensive introduction to the concept of social capital, which defines the intangible resources of community, shared values, and trust that we rely on in everyday life. The term has gained significant traction across the social sciences due to the diverse contributions of Pierre Bourdieu in France, and James Coleman and Robert Putnam in the United States, and has become a central explanation for the observed decline in social cohesion and community values in Western societies.

The book not only delves into the theoretical aspects of the subject but also examines the empirical work that has been conducted to understand its workings. Moreover, it discusses the impact social capital has had on policy-making, particularly within international organizations such as the World Bank and the European Commission.

With its clear and thorough approach, this fully revised third edition of Social Capital offers valuable insights into changing policy perceptions of social capital, its relationship with the internet and economics, and its resilience during challenging times. Complete with guides for further reading and a list of the most important websites, this book is an essential resource for anyone interested in the intersection of sociology, politics, and social policy.