As the Gulf Coast attempts to recover from the emotional and physical scars of Hurricane Katrina the nation’s most expensive natural disaster Wharton and University of Pennsylvania faculty are raising questions about how society should assess and perceive risk and how it should compensate victims when disaster strikes. A new book entitled On Risk and Disaster: Lessons from Hurricane Katrina by University of Pennsylvania provost Ronald J. Daniels political science professor Donald F. Kettl and Howard C. Kunreuther Wharton professor of operations and information management argues that the U.S. government has become an insurer of last resort and questions whether that unofficial policy is contributing to larger and costlier disasters.