Instructions for (A) using the 'Value Added' tool for the GTAP model and for (B) replicating the examples illustrated in the paper 

"GTAP-VA: An Integrated Tool for GVC Analysis"



***********************************************************************



(A)   Instructions for generalised use of the Value Added (VA) tool



• TABLO: The VA TABLO module must be added at the end of the standard TABLO (main model), and the TABLO must be re-implemented by GEMPACK.



• CMFSTART: Two lines must be added in the CMFSTART file, and paths for output files should be fixed according to the user's specific folders:

     o	File OUTPUT = c:\rungtap\"OWN VERSION FOLDER"\output.har; ! file for results, needed for running the invert matrix routine

     o	File VALUEADDED = c:\rungtap\"OWN VERSION FOLDER"\valueadded.har; ! to generate VA results.



• CLOSURE: Two exogenous variables, named "dummy" and "dummy2", must be added to the closure.



• EXPERIMENT: Once such adjustments have been done, an "Invert Matrix" experiment could be launched. It consists in shocking Dummy and Dummy2 as showed below:

     o	shock dummy=1;

     o	shock dummy2=1;



Any time such experiment is run, the VA module will create an HAR file, as described in the paper, which contains the VA results. 

It must be noticed that the VA results refers to the baseline, i.e., the VA routine works on "Basedata.har". 

It turns that you can apply the Invert Matrix routine to any "Basedata.har". 



Note: Please be aware that there could be solution problems in the matrix inversion with a large number of regions/sectors. Computation limits depend on 

computer performances, solution methods, as well as specific aggregation choices since they affect the number of zeroes in the matrix.

It is worth recalling that the dimensional issue may be overcome through the use of SAGEM (see TPMH0165 at http://www.copsmodels.com/archivep.htm).



--------------------------------------------------------------------



(B)   To replicate paper examples



• BASELINE: In order to replicate the results for the baseline showed in the paper, the "BaseVA" version should be used. 

It represents the VA analysis of the "baseline".

The zip folder provided, "BaseVA", should be is unzipped in the RunGTAP directory. 

To implement the VA analysis, the experiment named "Invert" must be run to generate the "valueadded.har" file.

Such file is saved in the version folder according to the instruction given in the CMFSTART file. In this case it is the "BaseVA" folder.



• FTA: In order to replicate the simulated scenario, the "FtaVA" version should be used in the same way of above.

This is a new version created by the RunGTAP Wizard tool, i.e., using the results from the "FTA" experiment located in the "BaseVA" version. 

That is, the “Basedata.har” in the “FtaVA” version is a renamed copy of the file "FTA.upd" in the “BaseVA” folder. 

Once the new version is created, the "invert.exp" must be run in order to generate the "valueadded.har" file.

Remind to adjust the CMFSTART in an appropriate way in order to save it in the right version folder, in this case the "FtaVA" folder.