Applied General Equilibrium Modelling ANNARES, STAGE and R23 Models

© Scott McDonald

Database for ANARRES

ANARRES is designed to be calibrated using a global Social Accounting Matrix (SNA) with multiple satellite accounts. Provided the global SAM is consistent with the SNA principles and price system the ANARRES model should operate with minimal adjustments, an example of this are the adjustments made to accommodate aspects of the GTAP database.

By default ANARRES currently uses the GTAP database needs to be transformed before being used by the ANARRES model. This procedure only needs to be undertaken once for each version/release of the GTAP database. Thereafter the user of ANARRES can develop any necessary aggregations using SAMGator. Or supplied GAMS code

The reason for only needing to run this procedure once is that the process involves addressing both structural and data format issues, while ensuring that the database is fully consistent with the national accounting conventions underlying a SAM. Structural issues relate to the behavioural relationships in the ANARRES model (the structure of GTAP database is not generic, it is conditioned to the GTAP model’s behavioural relationships). The format issue arises because the GTAP database is compiled using the GEMPACK software, which is single precision, whereas the GAMS software - used for ANARRES - is double precision. The ANARRES model uses settings that assume the database is ‘balanced’ to 13/14 decimal places.

We try to update the code as soon as we have access to a new version of the GTAP database. Not being consortium members this cannot be before new versions of GTAP go on general realease.


All the downloads  of code are made available a

GAMS User Libraries

Technical Document