Dr. Jay Bhattacharya, a professor of Medicine and a CHP/PCOR core faculty member, speaks about the Center on the Demography and Economics of Health and Aging (CDEHA). He discusses how the center's research promotes a better understanding of the health needs of aging populations around the world.  As societies age, it is important for people and governments to understand how to cope with the economic and health consequences of having a larger elderly population.  CDEHA's Japanese Future Elderly Model simulates changes in the aging population of Japan and helps researchers understand what changes healthcare and governments can make to prepare for aging populations.