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AP VoteCast, United States, 2018

Resource Type
Dataset : survey data
  • Tompson, Trevor
  • Benz, Jennifer
Other Title
  • Version 1 (Subtitle)
Publication Date
Publication Place
Ann Arbor, Michigan
  • Inter-University Consortium for Political and Social Research
Funding Reference
  • Associated Press
Free Keywords
Schema: ICPSR
elections; voters
  • Abstract

    AP VoteCast is a survey of the American electorate conducted in all 50 states by NORC at the University of Chicago for the Associated Press (AP) and Fox News. The survey is funded by AP. The survey of 138,929 registered voters was conducted October 29 to November 6, 2018, concluding as polls closed on Election Day. Interviews were conducted via phone and web, with 11,059 completing by phone and 127,870 completing by web.AP VoteCast combines interviews with a random sample of registered voters drawn from state voter files; with self-identified registered voters conducted using NORC's probability-based AmeriSpeakĀ® panel, which is designed to be representative of the U.S. population; and with self-identified registered voters selected from nonprobability online panels. Interviews were conducted in English and Spanish. Respondents received a small monetary incentive for completing the survey. Participants selected from state voter files were contacted by phone and mail, and had the opportunity to take the survey by phone or online.
  • Methods

    Presence of Common Scales: None
  • Methods

    Response Rates: 4.2 percent for the probability sample drawn from the state voter files.
  • Abstract


    • DS1: AP Votecast 2018 Data
Temporal Coverage
  • Time period: 2018-10-29--2018-11-06
  • 2018-10-29 / 2018-11-06
  • Collection date: 2018-10-29--2018-11-06
  • 2018-10-29 / 2018-11-06
Geographic Coverage
  • United States
Sampled Universe
Registered voters in the 50 U.S. states. Smallest Geographic Unit: State
Probability-based Registered Voter Sample: in each of the 25 states in which VoteCast includes a probability-based sample, NORC obtained a sample of registered voters from Catalist LLC's registered voter database. This database includes demographic information, as well as addresses and phone numbers for registered voters, allowing potential respondents to be contacted via mail and telephone. The sample was stratified by state, partisanship, age and race. In addition, NORC attempted to match sampled records to a registered voter database maintained by L2, which provided additional phone numbers and demographic information. After the matching, NORC had phone numbers for 86 percent of sampled records, including cell phone numbers for 60 percent of records with a phone number. Prior to dialing, all probability sample records are mailed a postcard inviting them to complete the survey either online using a unique PIN or via telephone by calling a toll-free number. Postcards are addressed by name to the sampled registered voter if that individual is under age 35; postcards are addressed to "registered voter" in all other cases. Telephone interviews are conducted with the adult that answers the phone. Both online and telephone respondents provided confirmation of registered voter status in the state.Nonprobability Sample: Nonprobability participants were provided via the Harris Panel, including members of its third-party panels. Digital fingerprint software and panel-level ID validation is used to prevent respondents from completing the VoteCast survey multiple times. Nonprobability respondents provided confirmation of registered voter status in the state.AmeriSpeak Sample: during the initial recruitment phase of the AmeriSpeak panel, randomly selected U.S. households were sampled with a known, non-zero probability of selection from the NORC National Sample Frame and then contacted by U.S. mail, email, telephone and field interviewers (face-to-face). The panel provides sample coverage of approximately 97 percent of the U.S. household population. Those excluded from the sample include people with P.O. Box-only addresses, some addresses not listed in the USPS Delivery Sequence File and some newly constructed dwellings. AmeriSpeak panelists provided confirmation of registered voter status in the state.
Collection Mode
  • computer-assisted telephone interview (CATI)
  • web-based survey
This study is freely available to ICPSR member institutions via web download.
Alternative Identifiers
  • 37677 (Type: ICPSR Study Number)

Update Metadata: 2020-06-15 | Issue Number: 1 | Registration Date: 2020-06-15

Tompson, Trevor; Benz, Jennifer (2020): AP VoteCast, United States, 2018. Version 1. Version: v1. ICPSR - Interuniversity Consortium for Political and Social Research. Dataset.