Michael Hallsworth, PhD, is Managing Director of the Behavioral Insights Team (BIT) North America. He has held positions at Columbia University and Imperial College London.

Elspeth Kirkman is Chief Programme Officer at the innovation agency Nesta and a Visiting Senior Research Fellow at King's College London's Policy School and Exeter University's Business School. Working at the intersection of design, data, and experimentation, she is the coauthor of Behavioral Insights (MIT Press).