Estimating voter registration deadline effects with web search data

Alex Street, Thomas A. Murray, John B. Blitzer, Rajan S. Patel

Research output: Contribution to journalArticlepeer-review

8 Scopus citations


Electoral rules have the potential to affect the size and composition of the voting public. Yet scholars disagree over whether requiring voters to register well in advance of Election Day reduces turnout. We present a new approach, using web searches for "voter registration" to measure interest in registering, both before and after registration deadlines for the 2012 U.S. presidential election. Many Americans sought information on "voter registration" even after the deadline in their state had passed. Combining web search data with evidence on the timing of registration for 80 million Americans, we model the relationship between search and registration. Extrapolating this relationship to the post-deadline period, we estimate that an additional 3-4 million Americans would have registered in time to vote, if deadlines had been extended to Election Day. We test our approach by predicting out of sample and with historical data. Web search data provide new opportunities to measure and study information-seeking behavior.

Original languageEnglish (US)
Article numbermpv002
Pages (from-to)225-241
Number of pages17
JournalPolitical Analysis
Issue number2
StatePublished - Apr 1 2015

Bibliographical note

Publisher Copyright:
© The Author 2015. Published by Oxford University Press on behalf of the Society for Political Methodology. All rights reserved.


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