I-O Table Submission
Notes on procedures
Format specifications
Problem areas
What to send us?
What do we check?

GTAP Data Bases: What happens to my data after it is accepted?

Once accepted your data undergoes a number of steps to be included in the GTAP Data Base.
  1. Cleaning-your table is first clean of any small negatives or balancing differences.

  2. Disaggregation-any tables not disaggregated are disaggregated. Agricultural data is obtained from the FAO to disaggregate agriculture, while the representative (average) table is used to disaggregate other sectors.

  3. Your table is then combined with macro, trade and protection data collected elsewhere. Your I-O table provides the structure (shares) and the other data provide the values. An entropy procedure is then used to ensure that the data in the I-O table match the macro, trade and protection data.

  4. Some taxes and value added are replaced. Also labor is split into skilled and unskilled. These changes rely on external data contributed for all countries.

What happens to the Value Added data?
One area where changes are currently made is in value added. The value added shares for agricultural and resource commodities are adjusted and replaced. Total labor payments are split by skill level. Currently no adjustments are made for self-employed labor.

These adjustments to value added are currently on the agenda to be re-examined and improved. In the future data it is expected that data will be taken from the I-O tables and hence it is important that good value added data is contributed."