The 31st Annual Symposium of the Society for Nonlinear Dynamics and Econometrics (SNDE) will take place at the University of Padova on March 21 & 22, 2024, and will be hosted by the Department of Statistical Sciences and co-organized with the Department of Economics and Management “Marco Fanno.” The meeting aims to present and discuss recent developments in the theoretical and empirical analysis of nonlinearities in macroeconomics, econometrics, and finance. Confirmed keynote speakers are Esther Ruiz (Universidad Carlos III Madrid) and Franck Portier (University College London).