English Name
Time
Details from Source
SPPS
Manifesto Project
PS
ParlGov
SPP
Wikipedia
CHES
CLEA
Pe
EJPR PDY
V-Party
SP P
Wikipedia tags
DPI
ESS prtc*
ESS prtv*
Kitschelt (2013)
PolCon
TrFi
PPMD (2006)
WhoGov
World Values Survey
CCS
CSES-IMD
Elections Global
EPAC (2018)
ERDDA (2013)
FRP
euandi (GPS)
EU-NED
GPS 2019
IPOD
Jennings / Wlezien
PSS
KUREP (2012)
MAPP
SMP
Morgan (1976)
PAGED
PIP
Poll of Polls
POPPA
PPMD (all)
The PopuList
Ps
EES 2014
PePe
PPEPE (2021)
NPPSI
TF
EJS 2000
EJS 2010
added: March 5, 2020, 8:26 p.m. — updated: March 12, 2021, 11:16 a.m.