“…The data employed in our empirical analyses in the next section are composed of 174 election surveys in 19 established democracies (Australia 1996-2019, Austria 1995-2017, Denmark 1988, Finland 1991-2019, France 1988-2017, Germany 1976-2017, Greece 1993, Ireland 1989-2016, Italy 1987-2018, Luxembourg 1989-2018, the Netherlands 1971-2017, New Zealand 1990-2017, Norway 1973-2017, Portugal 1987, Spain 1986-2019, Sweden 1979-2018, Switzerland 1995, United Kingdom 1983-2017, and United States 1972-2016. In compiling our data, we merged all five modules of the Comparative Study of Electoral Systems (CSES), the European Voter dataset, and the European Election (voter) Studies (EES) 3 asking respondents about their self-placements and their placements of political parties, that contest national legislative elections, on the leftright scale .…”