Though fifty years is a tremendous time horizon for the forecasting of any trend involving the complex interactions of billions of people and billions of hectares of intricate planetary ecosystems, the analytic methodology of economics is the most capable toolbox available for such forecasting. At the center of such a forecast are two complex functions, supply and demand, coevolving over time and codetermining prices, production, investment, labor flows, export patterns, and most other major variables.
Eifert, Benn; Galvez, Carlos; Kabir, Naureen; Kaza, Avinash; Moore, Jack; and Pham, Christine
"The World Grain Economy to 2050: A dynamic general equilibrium, two sector approach to long-term world-level macroeconomic forecasting,"
University Avenue Undergraduate Journal of Economics: Vol. 7
, Article 1.
Available at: http://digitalcommons.iwu.edu/uauje/vol7/iss1/1