GTAP (Global Trade Analysis Project) is a global network of researchers and policy makers conducting quantitative analysis of international policy issues. GTAP's goal is to improve the quality of quantitative analysis of global economic issues within an economy-wide framework.
GTAP offers a variety of products, including: data, models, and resources for multi-region, applied general equilibrium analysis of global economic issues.
A Truly Global Project
GTAP is a truly global project, as can be seen by exploring the GTAP Network. Core support and advice for the Project come from a Consortium of international and national agencies from around the world.
The standard GTAP Model is a multiregion, multisector, computable general equilibrium model, with perfect competition and constant returns to scale. Innovative aspects of this model include:
The treatment of private household preferences using the non-
homothetic CDE functional form.
The explicit treatment of international trade and transport margins.
Bilateral trade is handled via the Armington assumption.
A global banking sector which intermediates between global savings and
The GTAP Model also
gives users a wide range of closure options,
including unemployment, tax revenue
replacement and fixed trade balance
closures, and a selection of partial
equilibrium closures (which facilitate
comparison of results to studies based on
partial equilibrium assumptions).
GTAP is formulated and solved using GEMPACK, a flexible system for solving AGE models. RunGTAP, a program developed by Mark Horridge at the Centre of Policy Studies, Monash University, is a visual interface to various GEMPACK programs. RunGTAP allows the user to run simulations interactively in a Windows environment using the GTAP general equilibrium model. No previous knowledge of the GEMPACK language or programming skills is necessary to use the program. Results and complementary information for the analysis are also provided in a Windows environment and can be accessed interactively. RunGTAP will run the standard GTAP Model with any GTAP Data Base which is not too large. To use larger data bases, or to modify the equations of the GTAP model, or to modify the standard condensation of the GTAP Model, you will also need a GEMPACK license.