“…To understand how the party systems were affected by globalization, I coded parties as one of four types: extreme right, center right, center left, and extreme left. Scholars have used various classification schemes to group party by policy preferences either through scoring parties along a left-right dimension (Benoit & Laver, 2007; Castles & Mair, 1984; Huber & Inglehart, 1995), broad classification groups (e.g., Christian-Democratic, Socialist) (Hix, 2003), or various policy dimensions scored by either area experts (Hooghe & Marks, 2018; Kriesi et al, 2006; Marks et al, 2017) or found in political party manifestos (Benoit & Laver, 2007). In the populism-specific literature, researchers have devised a further set of classifications but many only investigate one particular party family (e.g., extreme right parties) or a brief time-period.…”