Correcting the 'self-trade' issue in the GTAPAgg software - Technical Paper - École des Ponts ParisTech Access content directly
Other Publications Year : 2012

Correcting the 'self-trade' issue in the GTAPAgg software - Technical Paper


The successive versions of the GTAP databases are provided with GTAPAgg, a programme that computes values of the series of the database for any regional and sectoral aggregation. A 'self-trade' issue arises from the fact that GTAPAgg aggregates the several series concerned with international trade, like any other series, by simply summing them up: the resulting series include a share of exports and imports happening between the aggregated regions, which should rather be treated as economic flows internal to the region resulting from the aggregation process. This paper details a method that aims at solving this shortcoming, and discusses the importance of doing so. A first section puts the research question into context and discusses its likely importance when using GTAP as a calibration dataset for computable general equilibrium modelling. A second section details the analytics of the method proposed to correct the aggregation process, in the broader framework of a programme extending GTAPAgg to the production of national account matrixes in the standard United Nations format. An appendix provides the code of the extended aggregation programme developed.
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Dates and versions

hal-00799511 , version 1 (12-03-2013)


  • HAL Id : hal-00799511 , version 1


M. Hamdi-Cherif, F. Ghersi. Correcting the 'self-trade' issue in the GTAPAgg software - Technical Paper. 2012. ⟨hal-00799511⟩
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