# Name Parties Matches
Manifesto Project 21 21
ParlGov 19 19
Wikipedia 34 34
CHES 5 5
CLEA 32 32
CHISOLS 19 19
DPI 18 18
ESS prtc* 18 18
ESS prtv* 20 20
Huber / Inglehart (1995) 9 9
Kitschelt (2013) 7 7
PolCon 18 18
PPMD (2006) 8 8
World Values Survey 10 10
CSES 8 8
EPAC (2018) 5 5
Global Elections DB 21 21
Janda (1980) 2 2
Jennings / Wlezien 4 4