We synthesized a range of geographically-explicit forest, grassland and cropland biomass and soil carbon input data sources and used geographic information systems (GIS) software to calculate new estimates of soil and biomass carbon stocks for use with global economic models, particularly for...

With the recent adoption by the California Air Resources Board of California’s Low Carbon Fuel Standard, and USEPA’s Energy Independence and Security Act, greenhouse gas releases from indirect land use change triggered by crop-based biofuels have taken center stage in the debate over the...

This paper is for CGE modelers and others interested in modern trade theory. The Armington specification of trade, assuming country-level product differentiation, has been central to CGE modelling for 40 years. Starting in the 1980s with Krugman and more recently Melitz, trade theorists have...

We show how you can carry out systematic sensitivity analysis (SSA) with respect to parameters and/or shocks, which vary according to a specified covariance matrix. You can use the existing SSA tools in RunGTAP or RunGEM to do this if your model is implemented in GEMPACK. Those SSA tools assume...

In this paper we have investigated effects of GHG mitigation policies on livestock sectors. We used a global computable general equilibrium GTAP-AEZ-GHG model with explicit unique regional land types, land uses and related GHG emissions. The model is then augmented with cost and GHG response...

Over the past three years, there has been a convergence of interest in the global farm and food system and its contributions to feeding the world’s population as well as to ensuring the environmental sustainability of the planet. The 2007/2008 commodity crisis underscored the vulnerability of...

This study analyzes the optimal allocation of the world's land resources over the course of the next century in the dynamic forward-looking framework, which brings together distinct strands of economic, agronomic, and biophysical literature and incorporates key drivers affecting global landuse....

In recent years there has been a flurry of activity aimed at evaluating the land use consequences of biofuels programs and the associated carbon releases. In this paper we argue that these studies have tended to underestimate the ensuing land use emissions, because they have ignored the role of...

The goal of this technical paper is to provide sufficient detail to permit readers to bring into the GTAP poverty framework additional countries for which suitable household data are available. With the inputs from processed household data - as per the guidelines provided here - the poverty...

While constructing a new baseline for the GDyn model, we spent a lot of time collecting projections and deciding which data to choose. We also developed programs to aggregate projections to any specific geographical aggregation of the GTAP Data Base. In order to help researchers in the...