Voting correlations
Source
Torben Iversen and David Soskice (2006). Electoral institutions and the politics of coalitions: Why some democracies redistribute more than others. American Political Science Review, 100, 165-81. Table A2.
Details
These are the correlations of traits, where each trait is measured for 17 developed countries (Europe, US, Japan, Australia, New Zealand).
References
Using Graphs Instead of Tables. http://tables2graphs.com/doku.php?id=03_descriptive_statistics
Examples
corrgram(vote, order=TRUE)