This widely used text provides a clear and critical summary of research approaches to the epidemiological study of workplace hazards. After 15 years, it has been thoroughly revised with a new co-author. The Second Edition provides updated discussions of methods such as case-cohort and case-crossover designs and statistical analysis of repeated measures data, a new chapter on occupational health surveillance, a wider range of examples involving acute and chronic health outcomes, and a renewed emphasis on the integration of exposure measurement with epidemiologic analysis. It will serve both as a textbook for courses on occupational epidemiology and as a practical handbook for the design, implementation, and evaluation of research in this field.