Modeling Hostage-Taking: On Reputation and Strategic Rationality of Terrorists

This article takes a fresh look at hostage-taking from a game theoretic standpoint. A new model is developed that shows why conventional government deterrence strategies may fail.     

Teilhaftung bei alternativer Kausalität mit Zufall

Der Beitrag besch?ftigt sich mit der schadenersatzrechtlichen Problematik der alternativen Verursachungskonkurrenz von Haftungsgrund und Zufall und dabei insb mit der Probleml?sung über eine Teilhaftung für blo? m?gliche Kausalit?t. Neben einer Erl?uterung der einer Teilhaftungsl?sung zugrunde liegenden Gedanken und der anerkennenden Stimmen in Lehre und Judikatur erfolgt eine Darstellung und Würdigung der dazu ergangenen kritischen Stellungsnahmen.     

How Targeted Enforcement Shapes Marketing Decisions of Pimps: Evidence of Displacement and Innovation

Abstract

Little research to date has examined how those who serve as intermediaries between clients and prostitutes (i.e., pimps) are influenced by targeted police interventions. While earlier work noted that displacement from risky online venues (i.e., Backpage and Craigslist) occurs, this study relies on data gathered from interviews with a purposive sample of pimps in the cities of Atlanta and Chicago to examine further the effects of targeted enforcement on where pimps advertise online and use of technological tools to reduce risk of detection. Pimps who advertised on the Internet were not different from those who used nonvirtual advertising, suggesting similar markets in the virtual and nonvirtual illicit sex trade. The vast majority of pimps who utilized the Internet for business continued to use Craigslist and/or Backpage to advertise and developed additional tactics to leverage their use. Some pimps broadened their presence on the Internet to other locations (specialized websites), moved to the deep web, and utilized different technological tools to reduce their risk of detection. Last, pimps adopted more interactive marketing strategies that permitted them to remain where their customers were familiar, but tap into sections of websites that previously had not been utilized.     

Analysis of histomorphometric variables: Proposal and validation of osteon definitions

Histological analysis of bone tissue has been used to explore a variety of questions relating to age-at-death, habitual behaviors, health, and nutritional stress. Identification of intact and fragmentary osteons is of key interest to many researchers in these studies, yet the definitions of these features vary between researchers making cross-study comparisons problematic. Furthermore, histological variable definitions are often ambiguous or require subjective classifications by the observer. As a result, and as indicated by previous studies, observer error and misclassification of certain variables, namely intact and fragmentary osteons, can be significant. This study proposes new definitions for intact and fragmentary osteons that are designed to limit observer subjectivity and also explore efficacy of combining osteon types into one variable. A sample of 30 6th rib cross-sections from a modern forensic population was used to test the validity of the proposed definitions. Observations of intact osteon population density (OPD(I)) and fragmentary osteon population density (OPD(F)) were made by three observers for each cross-section. These observations were used to explore the interobserver error associated with the proposed definitions and determine if combining variables into one variable (OPD) mitigates persisting classification difficulties. Results indicate that the proposed definitions significantly reduce interobserver error and misclassification of intact and fragmentary osteons. However, the interobserver error associated with fragmentary osteons is still high. Evaluation of the variables independently indicates that combining variables has potential to reduce the predictive strength of an age estimation model and the ability to interpret age-related bone remodeling.