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Eurostat disseminates a high number of statistical tables on its website and through specific user requests. All these tabular data are treated for primary confidentiality. Primary confidentiality concerns tabular cell data, whose dissemination would permit attribute disclosure. The two main reasons for declaring data to be primary confidential are: too few units in a cell and dominance of 1 or 2 units in a cell <a href="#conf" aria-describedby="footnote-label" id="conf-ref"></a>. These two reasons have been considered for FSS and for IFS. The following section presents the procedure used by Eurostat starting with 2020 IFS. |
In the tables disseminated on Eurostat website, a cell is confidential if:
- the (extrapolated) number of holdings that contribute to the cell (extrapolated) value is less than or equal to a certain value and/or
- the n largest (extrapolated) holdings represent more than a certain percentage k% of the cell (extrapolated) value.
A confidential value is replaced with ":c".
For non-confidential cells, the extrapolated number of holdings and all values of characteristics in cells are rounded to the closest multiple of 10.
Because of the confidentiality treatment, the sum of the individual cells does not systematically match with the value of the "total" cell.
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The Eurobase tables in SAS present the standard FLAG_CODE=A for the cells that are to be suppressed because of the threshold rule. In the code list on "confidentiality status" defined by the SDMX Statistical Working Group <a href="#sdmx" aria-describedby="footnote-label" id="sdmx-ref"></a>,, the flag A stands for <em> "Primary confidentiality due to small counts" </em>. |
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