Labor economics, health, demography, and the environment; linkages between health status, population change, and economic growth.
7 Billion and Counting. (2011)
Demographic Change, Social Security Systems, and Savings. (2007)
Booms, Busts, and Echoes. (2006)
Global Demographic Trends. (2006)
Health, Wealth, and Welfare. (2004)
Geography and Poverty Traps. (2003)