Linear hierarchies, the classical pecking-order structures, are formed readily in both nature and the laboratory in a great range of species including humans. However, the probability of getting linear structures by chance alone is quite low. In this paper we investigate the two hypotheses that are proposed most often to explain linear hierarchies: they are predetermined by differences in the a...

Why do essentialist beliefs promote prejudice? We proposed that essentialist beliefs increase prejudice toward Black people because they imply that existing social hierarchies reflect a naturally occurring structure. We tested this hypothesis in three studies (N 1⁄4 621). Study 1 revealed that racial essentialism was associated with increased prejudice toward Blacks among both White and Black a...

Contraction hierarchies are a simple hierarchical routing technique that has proved extremely efficient for static road networks. We explain how to generalize them to networks with time-dependent edge weights. This is the first hierarchical speedup technique for time-dependent routing that allows bidirectional query algorithms.

How do social comparisons over time shape perceptions of inequality? In thinking about subjective inequality, it is important to ask which social comparisons matter in establishing people's sense of relative social position and wider inequalities. These issues are discussed by drawing on a qualitative study of popular genealogy, which examines how people make sense of social position in the pas...

Every year, the United States employs nearly two million seasonal farm laborers, approximately half of whom are migrants (Rothenberg 1998). This article utilizes one year of participant observation on a berry farm in Washington State to analyze hierarchies of ethnicity and citizenship, structural vulnerability, and health disparities in agriculture in the United States. The farm labor structure...