“… 21 This literature has identified several causes for divergence, including policy motivations (e.g., Wittman 1983; Calvert 1985), deterring entry by third party candidates (e.g., Palfrey 1984; Callander 2005), incomplete information (e.g., Bernhardt, Duggan, and Squintani 2007), competition across heterogeneous districts (e.g., Callander 2005; Eyster and Kittsteiner 2007; Krasa and Polborn 2018), agency problems (e.g., Van Weelden 2013), and candidate/party “valences” (e.g., Bernhardt and Ingberman 1985; Groseclose 2001; Krasa and Polborn 2010, 2012; and Carter and Patty 2015). …”