![](\"cuny-gc-logo.png\"){kind=logo}
\r\n \r\n \r\n \r\n \r\n No votes were recorded in
in\r\n
\r\n RCV vote allocations \r\n \r\n Diagram shows vote allocations in\r\n AD {{ highlightedData.rawDistrictData.districtid }}ED {{ highlightedData.rawDistrictData.ed }}\r\n for each round of Ranked Choice Voting\r\n \r\n \r\n
\r\n
\r\n for\r\n
\r\n
\r\n In Round {{ roundLabels[round - 1] }}, this ADED had:\r\n
\r\n\r\n Foldenauer, Chang, Prince, Taylor, & Wright Jr. combinedLiftin & Pan combined{{ candidate.text }} received:\r\n
\r\n\r\n Foldenauer, Chang, Prince, Taylor, & Wright Jr. combined had no votes for this round because the candidates wereTerri Liftin & Alex Pan combined had no votes for this round because the candidates were\r\n {{ candidate.text }} had no votes for this round because the candidate was eliminated.\r\n
\r\n\r\n {{ office.value }} rcv results\r\n
\r\n\r\n\r\n Map shows round-by-round vote share by\r\n Assembly DistrictElection District for Aaron Foldenauer, Art Chang, Paperboy Love Prince, Joycelyn Taylor, & Isaac Wright Jr. combinedTerri Liftin & Alex Pan combined{{ candidateFullName }}\r\n
\r\n\r\n2021
\r\nLocal Patterns of Ranked Choice Voting in NYC
\r\n \r\n\r\nThe Center for Urban Research (CUR) at The Graduate Center of the City University of New York (CUNY) has created this NYC Ranked Choice Voting map to help members of the public, journalists, elected officials, and others to understand the hyperlocal patterns of New York's first citywide election using ranked choice voting: the June 22, 2021 primary. Our map visualizes the Democratic primary results for Mayor and Comptroller.
\r\n \r\nUsing the map
\r\n\r\n![](\"nycrcv2021_sankeyexamplewatermark.gif\")
\r\n \r\nFor each election district and Assembly district, CUR's map provides a powerful visual display of the vote flow during the RCV tallies for each candidate. (NB: except where noted, the districts are current as of 2021.) The vote flow visualization uses a color-coded Sankey diagram (example at right):
\r\n\r\nThe Sankey diagram also highlights where votes were rendered inactive in each RCV round. This reveals if inactive votes are concentrated by neighborhood, and locally how much of each eliminated candidate's votes were rendered inactive.\r\n
\r\n\r\nThe online map itself shows round-by-round vote share by district for each candidate. An RCV Rounds slider feature enables you to change the map display from one round to the next to see how each candidate's vote share increased as votes were allocated from eliminated candidates.\r\n
\r\n\r\n The votes for candidates in the first three rounds (for mayoral and for comptroller) were each combined for the purposes of this map. \r\n
\r\n\r\nIn the NYC mayoral primary, 3 candidates were eliminated in Round 6 using \"batch elimination\" (their combined votes were less than the candidate with the next-highest number of votes). In order to calculate how the votes from each of these 3 eliminated candidates were allocated individually, CUR separated the vote tallies for Round 6 into three separate \"rounds\": 6a, 6b, and 6c. The RCV Rounds slider reflects this approach. Calculating the candidate votes in this way does not affect the final vote outcome, but makes the mapped patterns more precise.\r\n
\r\n\r\n Additional maps and analysis of the RCV vote patterns are available via the CUNY Graduate Center's NYC Election Atlas.\r\n
\r\nData sources
\r\n\r\n\r\n The RCV vote tallies are obtained by aggregating data by district from the New York City Board of Elections. The Board of Elections published the cast vote record (CVR) for the June primary, detailing the ranking for each ballot certified by the Board. The cast vote record data is anonymous. CUR used special software (see the Credits section below) to convert the individual ballot records to aggregate vote counts by district.\r\n
\r\n\r\n N.B.: although the Board of Elections provided easy access to the CVR files online, the file formats were inconsistent and cumbersome, and the Board provided no documentation for the data. CUR parsed the data to the best of our ability, but vote tallies on the map may not exactly match vote totals certified by the Board. Absent any guidance from the NYC Board of Elections, the map reflects as accurate a picture of the RCV vote patterns as possible.\r\n
\r\n\r\n Boundaries for election districts and New York State Assembly districts are provided by the New York City Department of City Planning's Bytes of the Big Apple project. (NB: except where noted, the districts are current as of 2021.)\r\n
\r\n\r\nCredits
\r\n\r\n\r\nThe map application was developed by the Mapping Service at The Graduate Center, CUNY. The Mapping Service, part of the Center for Urban Research, engages with foundations, government agencies, businesses, nonprofits, and other CUNY researchers to use spatial information and analysis techniques to develop and execute applied research projects.\r\n
\r\n\r\nThe Center for Urban Research is a leader in applied research projects focused on demographic change, immigration trends, and neighborhood analysis. The Center is led by John Mollenkopf, distinguished professor of sociology and political science at The Graduate Center, who oversees CUR's work on elections and vote pattern analysis.\r\n
\r\n\r\nThe RCV mapping effort is coordinated by Steven Romalewski. The Mapping Service's senior application architect Will Field designed, created, & coded the application. Valerie Bauer, a graduate of Lehman College's Geographic Information Science program, customized the d3 Sankey diagram code for this application, compiled and analyzed the data behind the map, and helped develop the map designs & color themes.\r\n
\r\n\r\nFunding support for CUR's analysis of New York's ranked choice vote patterns comes from the Common Cause NY Education Fund.\r\n
\r\n\r\n Our ability to analyze NYC's ranked choice vote data by election district is due to the availability of the open source RCV Tabulator software, developed by the Ranked Choice Voting Resource Center. \r\n
\r\n\r\nThanks to the many people who provided feedback and suggestions for improvement based on early versions of the map. We encourage everyone using the map to send us feedback so we can continue to improve its usefulness. Thank you!\r\n
\r\n\r\nThe mapping website relies on the Graduate Center's server infrastructure and the support of the Graduate Center's information technology team.\r\n
\r\n\r\nThe application itself is built using a mix of open source and proprietary tools and technologies including:\r\n
\r\nShare a link to your map:
\r\n\r\nCopy this code to embed your map:
\r\nEmail or post to social media:
\r\n \r\n\r\n \r\n![](\"cuny-gc-logo.png\"\r\n){kind=logo}
\r\n \r\n Application developed by the Center For Urban Research at the CUNY Graduate Center\r\n \r\n Data files for RCV analysis
\r\n\r\n\r\n Common Cause New York and Unite Institute commissioned the Center for Urban Research to evaluate the impact of Rank Choice Voting (RCV) in New York City's June 2021 primary election. Our report [PDF] analyzes how different groups of voters used ranked choice voting across different types of campaigns; which higher-ranked candidates benefited from transfer votes from lower-ranked candidates; and whether these patterns of RCV usage are statistically associated with demographic characteristics, voter preferences, and electoral outcomes. \r\n
\r\n\r\n In order to analyze the RCV vote patterns for the June 2021 primary, CUR first downloaded the cast vote record (CVR) from the New York City Board of Elections. The CVR files are available from BOE here (here is a direct link to a zipped file with the data). The cast vote record data is anonymous.\r\n
\r\n\r\nSpecial thanks to the Ranked Choice Voting Resource Center which created the open source RCV Tabulator software which CUR used to convert the cast vote record data to vote counts by election district.
\r\n \r\n\r\n Based on this output from the RCV Tabulator Software, CUR created Excel files of round-by-round vote tallies for each candidate and vote transfers from eliminated candidates to remaining candidates for the following races:\r\n
\r\nCUR combined the CVR files from NYC BOE to calculate RCV metrics such as average rankings, ballots with multiple rankings, and ballots that only ranked single candidates. These metrics were calculated by election district within each borough for all races and citywide for mayor, comptroller, and public advocate races (except where noted, links below are to files in Excel format).
\r\n\r\nClick/tap to show candidate's vote share on map:
\r\n