presentation - VirtualRDC @ Cornell - Cornell University
presentation - VirtualRDC @ Cornell - Cornell University
presentation - VirtualRDC @ Cornell - Cornell University
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Three-layer confidentiality protection in<br />
QWI (II)<br />
■ Layer 3: Small-cell editing (Suppression or synthesizing)<br />
✦ Some aggregate estimates are based on fewer than three<br />
persons or establishments.<br />
✦ Currently, these estimates are suppressed and a flag set<br />
to indicate suppression.<br />
✦ In next version of disclosure-proofing system, these<br />
estimates are replaced with synthetic values.<br />
Note: Editing is only used when the combination of noise<br />
infusion and weighting may not distort the publication data<br />
with a high enough probability to meet the criteria layed out<br />
above.<br />
✦ Count data such as employment are subject to editing.<br />
✦ Continuous dollar measures like payroll are not.<br />
✦ Regardless of small-cell editing, all published estimates<br />
are still substantially influenced by the noise that was<br />
infused in the first layer of the protection system.<br />
August 10, 2005 - p. 8/31
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