Predicting Long-Term Food Demand, Cropland Use, and Prices

Thomas Hertel, Uris Lantz C. Baldos () and Dominique van der Mensbrugghe ()
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Uris Lantz C. Baldos: Center for Global Trade Analysis, Department of Agricultural Economics, Purdue University , West Lafayette, Indiana 47907-1145

Annual Review of Resource Economics, 2016, vol. 8, issue 1, 417-441

Abstract: This review seeks to survey, understand, and reconcile the widely divergent estimates of long-run global crop output, land use, and price projections in the current literature. We review the history of such projections and the different models and assumptions used in these exercises. We then introduce an analytical partial equilibrium model of the global crops sector, which provides a lens through which we can evaluate this previous work. The resulting decomposition of model responses into demand, extensive supply, and intensive supply elasticities offers important insights into the diversity of model parameterizations being employed by the existing models. Along with the methodology for implementing productivity growth, this helps explain some of the divergences in results. We employ a numerical version of the analytical model, which serves as an emulator of this entire class of models, to explore how uncertainties in the common underlying drivers and economic responses contribute to uncertain projections of output, prices, and land use in 2050. We place each of the published estimates reviewed here into the resulting empirical distribution of outcomes at mid-century. In addition, we quantify the sensitivity of these projections to model inputs. Our findings suggest that the top priority for future research should be improved estimation of agricultural factor supply elasticities, a topic that has been largely neglected in recent decades.

Keywords: agricultural output; crop prices; land use; projections; total factor productivity; food security (search for similar items in EconPapers)
JEL-codes: Q11 Q15 Q16 (search for similar items in EconPapers)
Date: 2016
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Citations: View citations in EconPapers (27)

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Working Paper: Predicting Long Term Food Demand, Cropland Use and Prices (2016)
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