"Within our modeling framework, we show that gentrification emerges only when high-income residents have some mobility, even if minimal, highlighting how their

"Within our modeling framework, we show that gentrification emerges only when high-income residents have some mobility, even if minimal, highlighting how their movement patterns catalyse the process. We treat relocation flows of agents in our city as time-varying edges in a temporal network, leveraging established tools from network science and human mobility research." So to summarize, when rich individuals wants to move, they do. Seems logical given they have the excess opportunity to do so with minimal risk / cost often associated with taking on whatever risks are associated with 'gentrifying'