1. Ball, R.J. 1981. On Lawrence R. Klein’s contributions to economics. Scandinavian Journal of Economics 83: 81–103.
2. Breit, W., and B.T. Hirsch 2004. Lives of the laureates: Eighteen Nobel economists, 4th ed. Cambridge, MA: MIT Press.
3. Courbis, R. 1981. International trade and multi-country models. Paris: Economica.
4. Haavelmo, T. 1943. The statistical implications of a system of simultaneous equations. Econometrica 11: 1–12.
5. Keynes, J.M. 1936. The general theory of employment, interest, and money. New York: Harcourt Brace.