How many voters per election? Simple count of ncvhis records.

Exploring the ncvhis Data for Even Year General Elections

The ncvoter file and the ncvhis file work together to give a comprehensive picture of North Carolina registration and voting participation over a period of about a decade prior to the versions, that is, the date stamps, of the files. Each person in the two files is identified by a unique “ncid” alphanumeric. North Carolina has many elections, some of which are jurisdiction-specific. I use the ncvhis records for only the even year general elections beginning in 2010 and discard the others.

The following table provides a summary of the ncvoter and ncvhis files within the context of my analysis. They are both dated 2020-04-18. Nvhis is a count of the persons (the ncid data item) who appear in the ncvhis file and who voted in each general election. Nvoter counts the matches of the ncvhis persons with what is in the ncvoter file. Dif is the difference between those two counts. Dif is quite small compared to either Nvhis or Nvoter. I expect there is a difference because people are expunged from the ncvoter file more frequently than from the ncvhis file, but I have not verified this.

Nactive is the count of persons in the ncvoter file who have an Active status and are registered as Democrat, Republican, or Unassigned (Independent), and who voted in each general election. DifActive is the difference between Nvhis and Nactive. It is larger than Dif because of the migration of some voters into an Inactive status or who have been removed from ncvoter.

PersonsVoting is the cumulative number of individuals voting, starting from the present (the bottom date).

The ncvhis Data Across Time
election_date
2010-11-02
2012-11-06
2014-11-04
2016-11-08
2018-11-06
Nvhis
2,699,185
4,540,938
2,938,997
4,768,188
3,754,119
Nvoter
2,683,701
4,519,098
2,927,247
4,754,758
3,745,111
Dif
15,484
21,840
11,750
13,430
9,008
Nactive
2,117,343
3,522,385
2,558,232
4,309,735
3,606,976
DifActive
566,358
996,713
369,015
445,023
138,135
Persons_Voting
6,239,164
6,087,745
5,403,580
5,191,056
3,754,070
0
Total 18,701,427 18,629,915 71,512 16,114,671 2,515,244


This report was run on 2020-10-28.