About the Authors

Ed Diener, PhD, is the Joseph R. Smiley Professor of Psychology at the University of Illinois at Urbana-Champaign and is recognized as the world's foremost authority on the science of happiness. He is also a senior scientist for the Gallup Organization.

Robert Biswas-Diener, Program Director at the Center for Applied Positive Psychology (UK) and part-time lecturer at Portland State University, lives in Milwaukie, Oregon. He is known as the "Indiana Jones of positive psychology" for his research on subjective well-being in remote cultures around the world.