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The Nexus Land-Use Model, an Approach Articulating Biophysical Potentials and Economic Dynamics to Model AgEcon
Souty, Francois; Brunelle, Thierry; Dumas, Patrice; Dorin, Bruno; Ciais, Philippe; Crassous, Renaud.
Interactions between food demand, biomass energy and forest preservation are driving both food prices and land-use changes, regionally and globally. This study presents a new model called Nexus Land-Use which describes these interactions through a generic representation of agricultural intensification mechanisms. The Nexus Land-Use model equations combine biophysics and economics into a single coherent framework to calculate crop yields, food prices, and resulting pasture and cropland areas within 12 regions inter-connected with each other by international trade. The representation of cropland and livestock production systems in each region relies on three components: (i) a biomass production function derived from the crop yield response function to inputs...
Tipo: Working Paper Palavras-chave: Land-use Change; Modelling; Global Biomass Projections; Environmental Economics and Policy; Q11; Q15.
Ano: 2012 URL: http://purl.umn.edu/122859
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Think Again: Higher Elasticity of Substitution Increases Economic Resilience AgEcon
Dumas, Patrice; Hallegatte, Stephane.
This paper shows that, counter-intuitively, a higher elasticity of substitution in model production function can lead to reduced economic resilience and larger vulnerability to shocks in production factor prices. This result is due to the fact that assuming a higher elasticity of substitution requires a recalibration of the production function parameters to keep the model initial state unchanged. This result has consequences for economic analysis, e.g., on the economic vulnerability to climate change.
Tipo: Working or Discussion Paper Palavras-chave: Substitution; Calibration; Constant Elasticity of Substitution; Shock; Risk and Uncertainty; D24; E17; E23.
Ano: 2009 URL: http://purl.umn.edu/54283
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