Most public controversies about the effects of chemicals on human health revolve around the risk of cancer—hardly surprising, considering that it is the second leading cause of death in the United States. People are concerned about the dangers of carcinogens in air, water, and food, and they expect their representatives in government to protect them from such hazards. On the other hand, the economic costs of eliminating every suspected carcinogen from the environment would cause tremendous economic hardship. How should policymakers use science to help strike a balance between the benefits of lowering the risk of cancer and the economic costs of regulation?

In this important book the authors squarely address the complex interaction of science and regulatory policy. They begin by clarifying the scientific issues that are central to regulatory decisions, then explain how and why scientists can honestly disagree about these issues. They demonstrate with two cogent case studies: the heated debates about formaldehyde and benzene, both useful but potentially toxic chemicals. By examining how scientists evaluated the risks from these chemicals, and what kinds of legislative, administrative, and judicial decisions emerged from the evaluations, the authors furnish insight into the checks and balances of health-risk regulation.

They point out that overselling science in this context is harmful to both science and democracy. Their final chapter proposes creative methods for constructing a bridge between the scientist and the regulator that will be invaluable to anyone concerned about health risks.

How do people decide whether or not to take chances with their health and safety? Do they pay attention to warnings about hazardous products used at home or on the job? What is the best way to present this information? These questions are becoming increasingly important as direct government regulation is replaced by programs to educate workers and consumers about risk. Information itself is becoming a regulatory device, but until now little has been known about its use and effectiveness.

Learning about Risk offers important new evidence on how people process information about risk and how they make choices under uncertainty. Drawing on work in a variety of disciplines—economics, decision science, marketing, and psychology—as well as on extensive original survey data, the authors take a close look at one type of risk information: the labeling of hazardous products and chemicals. They use the word labeling to mean all the tangible ways in which information is transmitted, including not merely warnings on bottles and cans but also leaflets and brochures, signs in the workplace, and store displays. The authors surveyed hundreds of consumers and chemical workers to explore a range of issues—the accuracy and appropriateness of people's risk assessments, the types of precautions they take, the values they attach to these measures, the wages they expect for performing risky jobs, and the relationship between the precaution taken and the content, wording, and format of the warning.

Overall, the authors show that information policies are a promising approach to controlling risks in the marketplace and on the job. Their findings will be of interest to government officials, policy analysts, economists, psychologists, and managers concerned professionally with the labeling of hazardous products.