Disclosure Control of Business Microdata: A Density-Based Approach

For continuous key variables, a measure of the individual risk of disclosure is proposed. This risk measure, the local outlier factor, estimates the density around a unit. A selective masking method based on the nearest-neighbour principle and microaggregation is also introduced. Some results of an application to the Italian sample of the Community Innovation Survey are presented. Copyright (c) 2009 The Author. Journal compilation (c) 2009 International Statistical Institute.