The Bank of Italy, working with Collegio Carlo Alberto–University of Turin and Norges Bank, has published a call for papers for the third edition of a conference on monetary policy and heterogeneity in households, firms, and financial intermediaries, drawing on insights from microdata. The conference will be hosted at the Bank of Italy in Rome on 13–14 October 2025. The event will focus on new approaches to modelling heterogeneity in the behaviour of firms, households and financial intermediaries, alongside new empirical evidence. Paper submissions and related questions are due by 2 May 2025, with authors of accepted papers to be notified by 12 May 2025.