 Since Joyce (1998), accuracy arguments for various Bayesian norms have been especially influential. They include arguments for conditionalization (Greaves and Wallace 2006, Briggs and Pettigrew forthcoming), the Reflection Principle (Easwaran 2013), and the Principal Principle (Pettigrew 2016). This line of research continues to develop. And these norms themselves have received further attention—e.g. Schoenfield (2017) on conditionalization, and Hall (1994, 2004), Ismael (2008) and Briggs (2009) on the Principal Principle. 