Abstract
This preprint models collective memory as a two-step decay process in which short-lived communicative memory and long-lived cultural memory sustain different temporal regimes of collective attention. The model predicts when cultural memory overtakes communicative memory and highlights policy-relevant implications for public problems.

Associate Professor, Data Science Institute, School of Engineering, Universidad del Desarrollo, Chile. Head of CRiSS-LAB.
Cristian Candia studies how societies transform information into collective relevance through attention, memory, preferences, and coordination. His work combines computational social science, network science, AI, and large-scale behavioral data to understand how groups, institutions, and societies decide what matters.