论文标题
种族隔离模式如何影响公平地区计划的可用性
How Segregation Patterns Affect the Availability of Fair District Plans
论文作者
论文摘要
我们创建了4200个合成城市，这些城市在少数族裔人口及其住宅隔离模式中有所不同。其中，有1200个在现有城市建模，而3000个是矩形网格城市。在每个城市，我们都会考虑假设市议会选举的单人投票区计划。公平的地区计划被定义为少数群体多数地区的数量与全市范围的少数民族人口成正比。因此，每个城市都由三个特征总结：少数族裔，隔离度量以及公平地区计划的可用性。我们发现，当少数族裔人口约为25％-33％时，隔离程度与比例地区计划的可用性之间存在正相关。一致地，当少数族裔人口以更加分散的住宅模式生活时，可用的比例地区计划更少。最后，我们开发了一种新方法来验证Gerrychain软件计划创建的地区计划集合的运行时和样本大小。
We create 4200 synthetic cities which vary in percent minority population and their residential segregation patterns. Of these, 1200 are modeled on existing cities, and 3000 are rectangular grid cities. In each city, we consider single-member voting district plans for a hypothetical city council election. A fair district plan is defined as one where the number of minority-majority districts is proportional to the city-wide minority population. Thus each city is summarized by three traits: minority percent, a measure of segregation, and availability of a fair district plan. We find that when the minority population is around 25%-33%, there is a positive correlation between the degree of segregation and the availability of proportional district plan. Consistently, when the minority population lives in a more diffuse residential pattern, there are fewer available proportional district plans. Finally, we develop a new method to validate runtime and sample size of an ensemble of district plans created by the GerryChain software program.
