# Name Parties Matches
Manifesto Project 25 25
ParlGov 35 35
Wikipedia 57 57
CLEA 30 30
EJPR PDY 20 20
CHISOLS 21 21
DPI 11 11
Huber / Inglehart (1995) 5 5
Kitschelt (2013) 5 5
PolCon 34 34
PPMD (2006) 6 6
World Values Survey 5 5
CSES 10 10
Jennings / Wlezien 8 8
Laver / Hunt 6 6
Mackie / Rose (1991) 47 47
PIP 19 19
Thomas (1975) 8 8