Aniruddha Ghosh, a graduate student in the department, recently published a paper at Journal of Economic Theory. The paper titled, “On the Existence of Berk-Nash Equilibria in Misspecified Markov Decision Processes with Infinite Spaces,” co-authored with Robert Anderson (UC Berkeley), Haosui Duanmu (HIT), and M. Ali Khan (JHU), addresses the critical issue of model misspecification in economics. It focuses on misspecified dynamic programming environments, which are routinely used to model decision-making problems in economics. The work substantially extends the applicability of a popular equilibrium framework for misspecified environments, known as Berk-Nash equilibrium, from finite environments to infinite environments of more general interest.