1. Barrett, David B., World Christian Encyclopedia, 1st ed. (Oxford, UK: Oxford University Press, 1982).
2. Barrett, David B., George T. Kurian, and Todd M. Johnson, World Christian Encyclopedia, 2nd ed. (Oxford, UK: Oxford University Press, 2001).
3. Barro, Robert J., Determinants of Economic Growth (Cambridge, MA: MIT Press, 1997).
4. Barro, Robert J., and Rachel M. McCleary, "Religion and Political Economy in an International Panel," Journal for the Scientific Study of Religion (2006), forthcoming.