1. Aghion, Philippe, and Peter Howitt, Endogenous Growth Theory (Cambridge, MA: MIT Press, 1998).
2. Antonelli, G. B., Sulla teoria matematica della economia politica (Pisa: privately printed, 1886).
3. Arrow, Kenneth J. ``An Extension of the Basic Theorems of Classical Welfare Economics,'' Proceedings of the Second Berkeley Symposium on Mathematical Statistics and Probability (Berkeley: University of California Press, 1951).
4. Baumol, William J., Sue Anne Batey Blackman, and Edward N. Wolff, Productivity and American Leadership: The Long View (Cambridge, MA: MIT Press, 1989).
5. Baumol, William J., Richard R. Nelson, and Edward N. Wolff, Convergence of Productivity: Cross-National Studies and Historical Evidence (New York: Oxford University Press, 1994).