# Name Parties Matches
Manifesto Project 16 16
Wikipedia 32 32
CLEA 49 49
CHISOLS 9 9
DPI 24 24
Huber / Inglehart (1995) 4 4
Kitschelt (2013) 3 3
PolCon 19 19
CSES 15 15
Jennings / Wlezien 3 3