DW-NOMINATE was developed by US political scientists to study the US House and Senate. Higher dimensionality is present internationally, and I believe that atte

DW-NOMINATE was developed by US political scientists to study the US House and Senate. Higher dimensionality is present internationally, and I believe that attempting to reduce those dynamics to a left/right spectrum limits our understanding of politics. >Poole and Rosenthal note in Chapter 11 of Ideology and Congress that most of these analyses produce the finding that roll call voting is organized by only few dimensions (usually two): "These findings suggest that the need to form parliamentary majorities limits dimensionality." https://en.wikipedia.org/wiki/NOMINATE_%28scaling_method%29 https://en.wikipedia.org/wiki/NOMINATE_%28scaling_method%29 Static parliamentary majorities are not necessary in a presidential system.