# Name Parties Matches
Manifesto Project 24 24
Wikipedia 26 26
CLEA 9 9
CHISOLS 3 3
DPI 16 16
ESS 15 15
Huber / Inglehart (1995) 12 12
Kitschelt (2013) 6 6
PolCon 13 13
PPMD (2006) 6 6
World Values Survey 19 19
CSES 12 12
Global Elections DB 9 9
Janda (1980) 1 1
KUREP (2012) 6 6
Mudde (2007) 1 1
Thomas (1975) 1 1