E-sample follow-up of nonmatched household should classify the parents as correct enumerations and the student as an “erroneous enumeration, other residence” (i.e., should have been enumerated at the college location only). In this instance, the A.C.E. would not label the college student as a duplicate because it would not know of the group quarters enumeration; the label would be “other residence,” meaning that the person should have been enumerated at the group quarters. Regardless, the A.C.E. would correctly classify the enumeration as erroneous.

Household persists in claiming the student in E-sample follow-up, so all three household members are classified as correct (nonmatched) enumerations.

Extra “correct” enumeration raises the correct enumeration rate, which (incorrectly) raises the DSE estimate of the population and net under count.

The P-sample interview should have reclassified the household as comprising inmovers (and hence not eligible for estimating the match rate) or dropped it from the sample as having been wrongly assigned to an A.C.E. block cluster.

The household is retained in the P-sample as a nonmover resident and used to contribute to the numerator as well as the denominator of the match rate depending on whether it matches a census enumeration inside the A.C.E. search area.

Depends on match status of erroneously retained P-sample resident nonmover cases. If predominantly matches, their inclusion (incorrectly) raises the match rate and lowers the DSE estimate of the population and net undercount.