“…4 See, e.g., Bakker et al 2015;Budge et al 2001. 5 See, e.g., Grimmer 2013;Grimmer, Westwood, and Messing 2015;Herzog and Benoit 2015;Pardos-Prado and Sagarzazu 2016;Proksch and Slapin 2015;Sagarzazu and Klüver 2017;Schwarz, Traber, and Benoit 2017. 6 Hoff, Raftery, and Handcock 2002;Hoff 2005. 7 That is, in a one-dimensional space, they are both placed to the left or the right of the zero point.…”