# Name Parties Matches
Manifesto Project 29 29
ParlGov 49 49
Wikipedia 37 37
CHES 18 18
CLEA 33 33
EJPR PDY 32 32
CHISOLS 14 14
DPI 25 25
ESS 11 11
Huber / Inglehart (1995) 7 7
Kitschelt (2013) 6 6
PolCon 15 15
PPMD (2006) 13 13
World Values Survey 16 16
CSES 15 15
EPAC (2018) 10 10
ERDDA (2013) 17 17
euandi (GPS) 10 10
Global Elections DB 12 12
Jennings / Wlezien 7 7
KUREP (2012) 6 6
MAPP 16 16
Mudde (2007) 2 2
PIP 18 18
POPPA 10 10
The PopuList 12 12
EES 2014 9 9