English Name
Time
Details from Source
PS
Manifesto Project
ParlGov
Wikipedia
CHES
CLEA
Paso
Wikipedia tags
CHISOLS
PSB
DPI
Socialist
ESS prtc*
ESS prtv*
Huber / Inglehart (1995)
Kitschelt (2013)
PolCon
SoPaSP
PPMD (2006)
WhoGov
CCS
CSES-IMD
FrancophoneSP
Elections Global
EPAC (2018)
EP roll call votes
ERDDA (2013)
euandi (GPS)
EU-NED
Global Elections DB
GPS 2019
IPOD
SoPa
KUREP (2012)
Laver / Hunt
SPSp
Leaders Global
Mackie / Rose (1991)
MAPP
NPED
FSP
PAGED
PIP
Poll of Polls
POPPA
PPDB (2017)
PPMD (all)
Ray (1999)
EES 2014
PSPaSo
Schlager / Weisblatt
SociaalPr
EJS 2000
EJS 2010
added: March 7, 2020, 2:55 p.m. — updated: March 12, 2021, 11:14 a.m.