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GTAP Resource #5697

"The critical role of conversion cost and comparative advantage in modeling agricultural land use change"
by Zhao, Xin, Katherine Calvin and Marshall Wise

The theoretical difference in land use modeling approaches is an important uncertain factor in evaluating future climate scenarios in global economic models. We compare five widely used land use modeling approaches: constrained optimization, constant elasticity of transformation (CET), the additive form of constant elasticity of transformation (ACET), logit, and Ricardian. We demonstrate that the approaches differ not only by the extent of parameter uses but also by the definition of conversion cost and the consideration of comparative advantage implied by land heterogeneity. We develop a generalized hybrid approach that incorporates ACET/logit and Ricardian to account for both conversion cost and comparative advantage. We use this hybrid approach to estimate future climate impacts on agriculture. We find a welfare loss of about 0.38 – 0.46 percent of the global GDP. We demonstrate that ignoring land heterogeneity or land conversion costs underestimates climate impacts on agricultural production and welfare.

Resource Details (Export Citation) GTAP Keywords
Category: 2019 Conference Paper
Status: Published
By/In: Presented at the 22nd Annual Conference on Global Economic Analysis, Warsaw, Poland
Date: 2019
Created: Zhao, X. (3/19/2019)
Updated: Zhao, X. (3/10/2020)
Visits: 1,853
- Climate impacts
- Land use

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  File format GTAP Resource 5697  (1.3 MB)   Replicated: 0 time(s)

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