1. Armstrong, J. S. (1985), Long-Range Forecasting. New York: John Wiley. Full text at hops.wharton.upenn.edu/forecast.
2. Ascher, W. (1978), Forecasting: An Appraisal for Policy Makers and Planners. Baltimore: Johns Hopkins University Press.
3. Berelson, B. & G. A. Steiner (1964), Human Behavior: An Inventory of Scientific Findings. New York: Harcourt, Brace & World.
4. Cowles, A. (1933), “Can stock market forecasters forecast?” Econometrica, 1, 309–324.
5. Craft, E.D. (1998), “The value of weather information services for nineteenth century Great Lakes shipping,” American Economic Review, 88, 1059–1076.