Individuals often form their identity based on their membership in a group and may exhibit a bias towards favoring members of the in-group (Greenwald and Pettigrew, 2014). When resources are plentiful, individuals are more likely to be tolerant of members of out-group sharing the resources. However, when there is a scarcity of resources, the resource stress could lead to a negative attitude towards members of the out-group as sharing of resources may be viewed as a zero-sum game. Schelling's spatial proximity model (Schelling, 1971; Schelling, 1978) shows how residential segregation emerges even when households only have a slight preference for members of their in-group. The original formulation by Schelling as well as many of its extensions have assumed that the amount of space available to agents to relocate was fixed. Agents' preference for members of the in-group also had been assumed to be invariant during the simulation run. This paper presents an extension of Schelling's model by relaxing these two assumptions to focus on the context of growing scarcity of environmental resources (e.g. habitable land) and the resulting decline in the tolerance for members of the out-group. Drawing upon theories in social psychology, it was assumed that declining resources lead to lower tolerance for members of the out-group as this scarce resource had to be shared. An agent-based simulation examined the impact of varying the degree of intolerance towards members of the out-group on the level of segregation in an artificial society. Several what-if scenarios were analyzed where the availability of an environmental resource (habitable land) declined over time. It was observed that with a high degree of intolerance towards members of the out-group, the degree of segregation in an artificial society while increasing initially became unsustainable and the highly segregated clusters eventually disintegrated.

个人通常会根据自己在小组中的成员身份来形成自己的身份，并且可能会偏向于喜欢小组中的成员（Greenwald和Pettigrew，2014年）。当资源丰富时，个人更可能容忍共享资源的小组外成员。但是，当资源短缺时，资源压力可能导致对外部成员的负面态度，因为资源共享可能被视为零和博弈。Schelling的空间邻近模型（Schelling，1971; Schelling，1978）显示了即使在家庭中仅对家庭成员略有偏爱的情况下，住宅隔离也是如何出现的。Schelling最初的表述及其许多扩展都假定代理商可动用的空间量是固定的。特工 在模拟运行期间，还假定对组内成员的偏好是不变的。本文通过放宽这两个假设，以关注环境资源日益稀缺（例如，可居住的土地）以及由此导致的外部群体容忍度下降的背景，提出了谢林模型的扩展。根据社会心理学的理论，假定资源减少导致对外部群体成员的容忍度降低，因为必须共享这种稀缺资源。基于代理的模拟研究了对外来群体成员的不容忍程度变化对人工社会隔离水平的影响。分析了几种假设情景，其中环境资源（可居住土地）的可用性随时间下降。