Michael Morse, Rachel Orey, and Joann Bautista have published a Bipartisan Policy Center report on list maintenance, based on Morse’s earlier article. Here’s an excerpt of the executive summary:

Voter registration lists are widely regarded as the backbone of election administration. To keep these lists up to date, election officials are responsible for identifying when voters move, die, or otherwise become ineligible to vote. The bureaucratic process known as “list maintenance” has long been a quiet feature of election administration, but has come under increasing scrutiny in recent years. Some advocacy groups equate the removal of voter registrations with disenfranchisement, labeling it voter purging; others maintain that voter lists are plagued by errors, characterizing them as “dirty

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