Why policies should be based on careful consideration of their costs and benefits rather than on intuition, popular opinion, interest groups, and anecdotes. Opinions on government policies vary widely. Some people feel passionately about the child obesity epidemic and support government regulation of sugary drinks. Others argue that people should be able to eat and drink whatever they like. Some people are alarmed about climate change and favor aggressive government intervention. Others don't feel the need for any sort of climate regulation. In The Cost-Benefit Revolution, Cass Sunstein argues our major disagreements really involve facts, not values. It follows that government policy should not be based on public opinion, intuitions, or pressure from interest groups, but on numbers--meaning careful consideration of costs and benefits. Will a policy save one life, or one thousand lives? Will it impose costs on consumers, and if so, will the costs be high or negligible? Will it hurt workers and small businesses, and, if so, precisely how much? As the Obama administration's "regulatory czar," Sunstein knows his subject in both theory and practice. Drawing on behavioral economics and his well-known emphasis on "nudging," he celebrates the cost-benefit revolution in policy making, tracing its defining moments in the Reagan, Clinton, and Obama administrations (and pondering its uncertain future in the Trump administration). He acknowledges that public officials often lack information about costs and benefits, and outlines state-of-the-art techniques for acquiring that information. Policies should make people's lives better. Quantitative cost-benefit analysis, Sunstein argues, is the best available method for making this happen--even if, in the future, new measures of human well-being, also explored in this book, may be better still.

As the dire history of planned economies highlights, small well-informed groups of people will often make far worse decisions than large numbers of people, acting independently, would make. In Infotopia, Cass Sunstein looks at the "wisdom of the many"--particularly as seen on today's Internet--illuminating many new ways of collecting and evaluating information and making effective decisions. Sunstein shows how the on-line efforts of many people coming together help companies, schools, governments, and individuals to amass ever-growing bodies of accurate knowledge. He describes for instance how Wikipedia, through an endless flurry of self-correcting exchanges, collects information on everything from politics and business to science fiction. Open-source software--which licenses programmers to use, change, and improve the software--taps the power of large numbers of people to spur technological development. And prediction markets--such as the famous Iowa Electronic Market, where people bet real money on the outcome of local and national elections--collect information in a way that allows companies, ranging from computer makers to Hollywood studios, to make better decisions about the future. Sunstein reveals why these revolutionary new methods are so astoundingly accurate and he also shows how people can take advantage of "the wisdom of the many" without succumbing to the dangers of herd mentality. "Sunstein, one of the biggest of America's internet big thinkers, has written an intriguing new book in which he argues that Hayek's insights about the genius of markets are equally true of the internet." --Patti Waldmeir, Financial Times "This extraordinary work synthesizes the latest in how we know, with the latest in what the web has become, to map more compellingly than any other book the promise and risk of the information society." --Lawrence Lessig, author of Free Culture and The Future of Ideas "Vivid, readable, and informativea show-me-the-money guide to what soars and what stumbles from the stable of Internet dreams." --Jedediah Purdy, American Prospect "Sunstein, one of the biggest of America's internet big thinkers, has written an intriguing new book in which he argues that Hayek's insights about the genius of markets are equally true of the internet. Sunstein argues, for example, that sharing scientific information online would cure some of the worst problems of the US patent system and foster innovation much more efficiently than costly patent litigation. Sunstein recognizes all the potential flaws of such collaborative projects. Groupthink can be dangerous. But, says Sunstein, the wisdom of the many is a great thing, and sharing knowledge online can lead to remarkable advances for companies, for governments and for the rest of us."--Patti Waldmeir, Financial Times "A survey of the evidence on how information technology affects political debate and institutional decision making. The result is a vivid, readable, and informative work of empiricist skepticism--a show-me-the-money guide to what soars and what stumbles from the stable of Internet dreams."--Jedediah Purdy, merican Prospect, Duke University "This extraordinary work synthesizes the latest in how we know, with the latest in what the web has become, to map more compellingly than any other book the promise and risk of the information society. As with everything Sunstein writes, this beautiful and clear book has something to teach the experts, and lots to teach the rest of us."-Lawrence Lessig, author of Free Culture and The Future of Ideas "Infotopia is a persuasive and sophisticated meditation on the ways in which the Web is not just living up to its early hype, but transcending it. Cass Sunstein has given us a brilliant integrative view of how the distributed users of the Internet can band together to produce extraordinary work--along with the circumstances that best give rise to deliberation r