Cook Partisan Voting Index
The Cook Partisan Voting Index ( CPVI ), often simply referred to as the Partisan Voting Index ( PVI ), is an index value that is calculated on the basis of previous election results and indicates the party-political orientation of a US constituency or US state compared to the state as a whole . It was developed by Charlie Cook in 1997 .
calculation
The index value is calculated from the election results of the last two US presidential elections . The difference between the respective average values of the national election result and the result in the constituency or state forms the index value. Depending on whether the Democratic Party or the Republican Party was elected above average , the numerical value is prefixed with a D + or an R +. For example, a PVI of D + 15 means that the result of the Democratic presidential candidates in this constituency exceeded the national total result in the last two elections by an average of 15 percentage points.
Sample values
The constituency with the highest value for the Democratic Party is New York's 15th Congressional constituency with a PVI of D + 43. The most "Republican" constituency is Texas' 13th Congressional constituency with a PVI of R + 32. As of the 2016 presidential election, there are three US states with a PVI of 0, namely Pennsylvania , Wisconsin, and New Hampshire .
Web links
Individual evidence
- ^ Charles E. Cook, David Wasserman: Recalibrating Ratings for a New Normal . In: PS: Political Science & Politics . tape 47 , no. April 02 , 2014, ISSN 1049-0965 , p. 304-308 , doi : 10.1017 / S1049096514000079 ( cambridge.org [accessed June 18, 2019]).