In November 2007, Illinois passed a law requiring optical scan voting machines to provide voters with an audible warning if they failed to register a vote in elections to any one of five statewide offices. The policy took effect in 2010, but 12 counties failed to upgrade their equipment in time to implement the policy. Miller (2013) exploited this opportunity to determine whether the alert reduced undervoting in the precincts where it was implemented, and found no significant effects in primary elections. We extend the analysis to precinct-level returns from the 2010 Illinois General Election, and find little evidence for reduced aggregate undervoting resulting from the audible undervote alert. We do, however, find some evidence that the alert was more effective for races that appeared on the lower portion of the ballot.
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