World Food Policy WFP Volume 4, No. 2, Spring 2018 | Page 17

Global and Regional Perspectives of Food Economy and Policy
relative to current weather. Glob-
al maize yields are projected to be 30
percent lower in 2050 without policy
interventions compared to no climate
change (Figure 2.6). This shows bio-
physical impacts without taking into
account economic adjustments, which
are analyzed below.
and rural infrastructure—on food pro-
duction, consumption, prices, and food
security.
Methodology
The IMPACT model (Figure 3.1) is a
highly disaggregated global model with
159 countries, 154 water basins, and 60
commodities that captures the impacts
3. Scenarios for Agricultural
of changes of patterns of diets over time
Investment and Food Security
as well as long-term growth. IMPACT is
n these section, alternative scenari- also linked to the GLOBE general equi-
os are analyzed to assess the impact librium model that captures impacts
of agricultural investments—in ag- and feedbacks from the economy-wide
ricultural research and development, perspective—not just the agricultural
irrigation and water used efficiency, sector.
I
Figure 3.1. IMPACT model framework
Source: Robinson, Sherman; Mason d’Croz, Daniel; Islam, Shahnila; Sulser, Timothy B.;
Robertson, Richard D.; Zhu, Tingju; Gueneau, Arthur; Pitois, Gauthier; and Rosegrant, Mark
W. 2015. The International Model for Policy Analysis of Agricultural Commodities and Trade
(IMPACT): Model description for version 3. IFPRI Discussion Paper 1483. Washington,
D.C.: International Food Policy Research Institute (IFPRI). http://ebrary.ifpri.org/cdm/ref/
collection/p15738coll2/id/129825
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