Inequality,Ethnicity, Political Mobilisation and Political Violence in Latin America: The Cases of Bolivia,Guatemala and Peru*

The paper explores the relationship between political violence and ‘horizontal’ inequality in ethnically‐divided countries in Latin America. The cases studied are Bolivia, Guatemala and Peru. Preliminary results are reported on the measurement of horizontal inequality, or that between groups, defined in cultural, ethnic and/or religious terms. The Latin American cases are shown to be often more unequal than the cases from Africa and Asia included in the wider study of which the work forms a part. The complex relationship between such inequality, ethnicity and political violence is explored historically. Ethnicity is today rarely a mobilising factor in violence in the Latin American cases, but the degree of inequality based on ethnicity is shown to be highly relevant to the degree of violence which results once conflict is instigated. History explains why.     

Social Utility in Ultimatum Bargaining

In this article we will provide an overview of factors that influence the weight that self-interest and equity related motives receive in ultimatum bargaining. These factors are grouped into three main categories: factors relating to the context of the game, factors relating to the parties involved, and factors related to characteristics of the game. Results of the studies are discussed in relation to the concept of social utility. The authors point out possible omissions in the literature—especially the lack of interest for the behavior of recipients—and recommend directions for future research.     

Using similarity judgments to conduct a mugshot album search

Mugshot searches fail because the witness must be shown too many photos. Current methods to reduce the number rely too heavily on verbal reports of individual features. This research reports three tests of a new system that augments the presently used tools by having the witness choose photos that are subjectively similar to the target. Each photo thus chosen increases the ranking of every photo in the album that is similar to it, as determined by a similarity network in which the album photos are embedded. Because the ranking of the target itself is usually thus increased, it is soon displayed. The tests used familiar targets, an incidental one, and unfamiliar videoed ones. From 76% to 84% of the “witnesses” reached the target, having viewed 2.4 to 8.5 times fewer photos than they would have had they simply leafed through photos as is traditionally done.     

Postmortem changes in resistivity of the anterior abdominal wall during the early postmortem period in rats

An accurate and reproducible technique was employed for the determination of the resistivity of excised portions of the anterior abdominal wall of rats. Resistivity decreased linearly (r = −0.93; P < 0.001) from 1438 ± 131 Ω · cm, immediately following death, to 360 ± 144 Ω · cm at a postmortem interval of 36 h. These changes are believed to reflect the morphological and/or chemical changes which occur at the cellular level during the early postmortem period.