Publications

This page shows all publications that appeared in the IASI annual research reports. Authors currently affiliated with the Institute are always listed with the full name.

You can browse through them using either the links of the following line or those associated with author names.

Show all publications of the year  2020, with author ALL, in the category IASI Research Reports (or show them all):


IASI Research Report n. 20-02  (Previous    Next)  

Claudio Gentile, Spagnolo-Arrizabalaga E., Castro J.

AN ALGORITHM FOR THE MICROAGGREGATION PROBLEM USING COLUMN GENERATION

ABSTRACT
The field of Statistical Disclosure Control aims at reducing the risk of re-identification of an individual when disseminating data, and it is one of the main concerns of national statistical agencies. Operations Research (OR) techniques were widely used in the past for the protection of tabular data, but not for microdata (i.e., files of individuals and attributes). This work presents (as far as we know, for the first time) an application of OR techniques for the microaggregation problem, which is considered one the best methods for microdata protection and it is known to be NP-hard. The new heuristic approach is based on a column generation scheme and, unlike previous (primal) heuristics for microaggregation, it also provides a lower bound on the optimal microaggregation. Com- putational results on real data typically used in the literature show that solutions with small gaps are often achieved and that dramatic improvements are obtained with respect to the most popular heuristics in the literature.
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