# Name Parties Matches
Manifesto Project 27 27
ParlGov 46 46
Wikipedia 54 54
CHES 19 19
CLEA 24 24
EJPR PDY 23 23
CHISOLS 9 9
DPI 15 15
ESS 29 29
Huber / Inglehart (1995) 9 9
Kitschelt (2013) 7 7
PolCon 20 20
PPMD (2006) 13 13
World Values Survey 11 11
CSES 15 15
EPAC (2018) 10 10
ERDDA (2013) 14 14
euandi (GPS) 8 8
Global Elections DB 17 17
Janda (1980) 2 2
Jennings / Wlezien 5 5
KUREP (2012) 8 8
Mudde (2007) 5 5
PIP 19 19
POPPA 10 10
The PopuList 9 9
EES 2014 6 6