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The page provides a listing of free data bases and related utilities. Please contact Jeremy Douglas if you are interested in having a link posted on this page.
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Utilities for GAMs users
The GTAPinGAMS programs include tools for translation of the GTAP files into GAMS readable form, GAMS programs for dataset aggregation, filtering and the imposition of alternative tax rates on trade or domestic transactions. Versions of GTAPinGAMs:
GTAP8inGAMs
GTAP7inGAMs
GTAP6inGAMs
Older versions of GTAPinGAMs
The SAM extraction program - GTAP Technical Paper No. 22 includes some GAMS programs for extracting SAMS from the GTAP data and making them useable with global Gams models. These programs were developed by Scott McDonald.
GDX2HAR - Utilities written by Tom Rutherford and Mark Horridge make it relatively easy to convert data between GEMPACK and GAMS.
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The Value of Time in Trade - GTAP Data Base of AVEs for Estimating the Impacts of Swift Customs Clearance and Shipping V8.1 - The World Trade Organization (WTO) Bali Package that passed last week has a large trade facilitation component to it. CGE researchers interested in modeling the impacts of trade facilitation will be happy to know an updated data set of ad valorem tariff equivalents (AVEs) of the value of time in trade is now available free of charge. The AVE data set is consistent with the GTAP 8.1 Data Base. The data set provides AVEs for reducing one day in the time it takes to move internationally traded goods based on David Hummel's research on the value of time in trade. The database also contains information from the World Bank Doing Business Survey on the number of days to cross international borders including customs clearance, ports, and inland transport of international goods. New users of the database are encouraged to read the documentation carefully. Researchers already using this database (it has been available for a number of years) are encouraged to review the literature survey contained on the download page to gain new insights into the implementation of the data.
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GTAP 10 Data Base Documentation chapters 1 and 2 are particularly useful for new users to see how what is included in the GTAP Data Base and how it was structured. The GTAP Data Base is designed to be used with the GTAP Model and is typically run through the RunGTAP software. Before running the model, the user should aggregate the data (regions, commodities and endowments) using the GTAPAgg2 (or FlexAgg) program provided with the data base to the desired level and then use with the economic model (e.g., GTAP or GTAPinGAMS) to analyze the impact of global policies (trade, environmental, migration policies are commonly examined). Alternatively a user may be interested in extracting country SAMs or I-O tables from the GTAP Data Base for single country models.
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