# Name Parties Matches
Manifesto Project 13 13
ParlGov 35 35
Wikipedia 41 41
CHES 11 11
CLEA 21 21
EJPR PDY 8 8
CHISOLS 5 5
DPI 5 5
ESS 13 13
Huber / Inglehart (1995) 3 3
Kitschelt (2013) 3 3
PolCon 12 12
PPMD (2006) 5 5
World Values Survey 4 4
CCS 10 10
CSES 7 7
EPAC (2018) 15 15
EP roll call votes 10 10
ERDDA (2013) 13 13
euandi (GPS) 13 13
Global Elections DB 6 6
IPOD 9 9
Janda (1980) 2 2
Jennings / Wlezien 4 4
KUREP (2012) 5 5
Laver / Hunt 5 5
Mackie / Rose (1991) 21 21
MAPP 9 9
Mudde (2007) 4 4
ParlSpeech 21 21
PIP 13 13
POPPA 9 9
PPDB (2017) 7 7
Ray (1999) 8 8
The PopuList 5 5
EES 2014 11 11
Thomas (1975) 5 5