Term	Net Census Undercount
Synonym	Net Undercount Net Undercoverage Net Under-enumeration
Related Term
Source of Definition	A Report on the 2006 Post-enumeration Survey www.stats.govt.nz/analytical-reports/report-2006-post-enumeration-survey
Short Definition
Statistical Activity	Population and migration

Definition
The difference between undercount and overcount. It is usually expressed as a percentage of what should have been the complete count rather than as a percentage of what was counted.

Example
The 1996, 2001, and 2006 post-enumeration surveys estimated net census undercount of the New Zealand population to be 1.6 ± 0.2, 2.2 ± 0.3, and 2.0 ± 0.4 percent, respectively (sample errors at the 95 percent level).