The multi-agent approach has been useful in the innovation, anti-trust, environmental, and
security policy domains, among others (Axelrod 1997; Barnett et al. 2000; Epstein and Axtell 1996;
Gilbert and Troitzch 1999). One early application shows how a widespread individual preference
for having as few as one-third of your neighbors share your own ethnicity will lead to highly segregated housing patterns, even in the absence of discriminatory real estate market actors and policies (Schelling 1978).