“…It is well known that the standard New Keynesian model does a poor job in explaining inflation inertia (Buiter and Grafe 2001, Mankiw 2001, Fuhrer 2009. Several modifications to models with rational expectations have been proposed such as mechanical indexation (Yun 1996, Christiano, Eichenbaum, and Evans 2005, Ascari and Ropele 2012, real wage rigidities (Blanchard andGalí 2007, Ascari andMerkl 2009), staggered pricing policies (Calvo, Celasun, and Kumhof 2007), sticky information (Mankiw and Reis 2002, Agliari et al 2017, Branch and Evans 2017, rational inattention (Zhang 2017), or habits (Collard, Fève, and Matheron 2007). But, as argued by Nimark (2008), these emerge as ad-hoc fixes, aimed at identifying features that might align theory with evidence rather than pushing toward a more general theory.…”