Aggregation and Emergence in Agent-Based Models: A Markov Chain Approach
  We analyze the dynamics of agent--based models (ABMs) from a Markovian perspective and derive explicit statements about the possibility of linking a microscopic agent model to the dynamical processes of macroscopic observables that are useful for a precise understanding of the model dynamics. In this way the dynamics of collective variables may be studied, and a description of macro dynamics as emergent properties of micro dynamics, in particular during transient times, is possible. 
Sven Banisch, Ricardo Lima and Tanya Ara\'ujo
nlin.AO cond-mat.stat-mech