Sexual dimorphism in America: geometric morphometric analysis of the craniofacial region

One of the four pillars of the anthropological protocol is the estimation of sex. The protocol generally consists of linear metric analysis or visually assessing individual skeletal traits on the skull and pelvis based on an ordinal scale of 1-5, ranging from very masculine to very feminine. The morphologic traits are then some how averaged by the investigator to estimate sex. Some skulls may be misclassified because of apparent morphologic features that appear more or less robust due to size differences among individuals. The question of misclassification may be further exemplified in light of comparisons across populations that may differ not only in cranial robusticity but also in stature and general physique. The purpose of this study is to further examine the effect of size and sex on craniofacial shape among American populations to better understand the allometric foundation of skeletal traits currently used for sex estimation. Three-dimensional coordinates of 16 standard craniofacial landmarks were collected using a Microscribe-3DX digitizer. Data were collected for 118 American White and Black males and females from the W.M. Bass Donated Collection and the Forensic Data Bank. The MANCOVA procedure tested shape differences as a function of sex and size. Sex had a significant influence on shape for both American Whites (F = 2.90; d.f. = 19, 39; p > F = 0.0024) and Blacks (F = 2.81; d.f. = 19, 37; p > F = 0.0035), whereas size did not have a significant influence on shape in either Whites (F = 1.69; d.f. = 19, 39; p > F = 0.08) or Blacks (F = 1.09; d.f. = 19, 37; p > F = 0.40). Therefore, for each sex, individuals of various sizes were statistically the same shape. In other words, while significant differences were present between the size of males and females (males on average were larger), there was no size effect beyond that accounted for by sex differences in size. Moreover, the consistency between American groups is interesting as it suggests that population differences in sexual dimorphism may result more from human variation in size than allometric variation in craniofacial morphology.     

Estimation and evidence in forensic anthropology: age-at-death

A great deal has previously been written about the use of skeletal morphological changes in estimating ages-at-death. This article looks in particular at the pubic symphysis, as it was historically one of the first regions to be described in the literature on age estimation. Despite the lengthy history, the value of the pubic symphysis in estimating ages and in providing evidence for putative identifications remains unclear. This lack of clarity primarily stems from the fact that rather ad hoc statistical methods have been applied in previous studies. This article presents a statistical analysis of a large data set (n = 1766) of pubic symphyseal scores from multiple contexts, including anatomical collections, war dead, and victims of genocide. The emphasis is in finding statistical methods that will have the correct "coverage."Coverage" means that if a method has a stated coverage of 50%, then approximately 50% of the individuals in a particular pubic symphyseal stage should have ages that are between the stated age limits, and that approximately 25% should be below the bottom age limit and 25% above the top age limit. In a number of applications it is shown that if an appropriate prior age-at-death distribution is used, then "transition analysis" will provide accurate "coverages," while percentile methods, range methods, and means (+/-standard deviations) will not. Even in cases where there are significant differences in the mean ages-to-transition between populations, the effects on the stated age limits for particular "coverages" are minimal. As a consequence, more emphasis needs to be placed on collecting data on age changes in large samples, rather than focusing on the possibility of inter-population variation in rates of aging.     

Predictors of sexually coercive behavior in a nationally representative sample of adolescent males

Data from male participants in the National Longitudinal Study of Adolescent Health are used to examine childhood predictors of late adolescent and early adulthood sexually coercive behavior and adolescent mediators of these relationships. A path analysis shows that experiencing sexual abuse as a child has a direct effect on perpetrating subsequent coercion that is partially mediated by early sexual initiation. Involvement in delinquent activities in adolescence was the only additional significant predictor of sexually coercive behavior and completely mediated the relationship between physical abuse in childhood and later sexual coercion. Of note, more than half of men reporting sexually aggressive acts had no history of childhood victimization, so pathways to sexually coercive behavior for this group remain unidentified. In addition to the universal prevention approaches currently in use in the field, these findings suggest that targeted prevention programs need to be formulated for youth with histories of childhood sexual or physical abuse.     

An Examination of the Influence of Veteran Status on Offense Type Among an Inmate Sample

The current study examines the relationship between military service and criminal behavior of veterans, both combat and non-combat, compared to non-veterans using a nationally representative sample of inmates. Specifically, this study examines the relationship between veteran status and crime type among inmates in state and federal institutions. While the relationship between military service and criminal behavior of veterans has received considerable attention, many have failed to differentiate between veterans who have seen combat versus those who have not. Therefore, a subsample of veterans who experienced combat during their military service is examined to better inform our understanding how combat experience might influence this relationship. Multiple counterfactual methods, including propensity score matching, were used on data from the Survey of Inmates in State and Federal Correctional Facilities, 2004. Some significant differences exist in the types of offenses committed based on veteran status and combat experience, but in some cases contrary to expectations. Veterans were more likely to have committed a violent offense, but less likely to have committed drug offenses; whereas, combat veterans were more likely to commit a drug offense and less likely to commit a violent offense than non-combat veterans. Policy implications and recommendations for future research are explored.     

Networking in the Shadow of the Law: Informal Access to Legal Expertise through Personal Network Ties

Civil legal problems are common in everyday life, but the costs of obtaining legal representation create barriers to legal action and contribute to disparities in access to justice. Some individuals, however, may have informal access to legal assistance through personal network ties with lawyers, enhancing their responses to justiciable problems. In this study, we draw from theories of social capital and network formation to examine the distribution and mobilization of network‐based legal expertise. Using nationally representative survey data, we find that network‐based access to lawyers is widespread, and most people who have ties to lawyers expect to informally mobilize legal assistance when facing a problem. But people who are most likely to afford formal legal representation are also most likely to have informal access to lawyers. Thus, while informal access to lawyers may shape responses to legal problems, it may also exacerbate inequalities in experiences with civil justice events.     

The Nature of Circuit Court Gatekeeping Decisions

This article provides an analysis of the nature of circuit court threshold decisions. Specifically, a model sensitive to the institutional context of the circuits is developed and tested across all threshold decisions in the sample and in more limited samples of proper party and proper forum votes. The results suggest that circuit court gatekeeping is a function of multiple factors, including circuit court law, litigant status, the lower court decision, and, at times, the ideological preferences of the circuit judge or that of his or her circuit.     

Paying for Violence? Spousal Abuse and Son Preference in India

We find a puzzling correlation in the data on domestic violence and children’s outcomes in India. Using the 2005–2006 National Family and Health Survey, we see that girls in families experiencing spousal violence are less worse off than boys when only fathers report a son preference while the gender bias reverses when only mothers report having a son preference. To shed light on the puzzle in the data, we present a non-cooperative theoretical framework based in economic theories of domestic violence, whereby differing parental son preference and bargaining over investments in girl and boy children potentially explains the observed relationship.     

Who Benefits? The Interactional Determinants of Microfinance’s Varied Effects

Since its emergence as a development tool, scholars and practitioners have questioned microfinance’s short- and long-term impacts but have had insufficient empirical evidence to assess them. To address this gap, this paper draws on mixed method research to assess the effects of microfinance loan and educational services over time. It explores why, even within the same microfinance institution (MFI), some borrowers benefit from microfinance services more than others in the short-term, and examines how this translates into long-term impacts. The article identifies understudied sources of intra-group variation: the diversity and choices of borrowers and MFI employees interacting with each other and their broader contexts.     

Navigating the Unknown: Barriers to Evidence-Based Defence and Security Policy in the European Union

At a time when Europe faces numerous crises, there is a real need for rigorous evidence to underpin effective policymaking. However, a gap between academia and policy creates clear obstacles in the use of evidence in policymaking. Many of these enduring obstacles are manifest in the inherent differences between separate communities: academics have difficulty communicating research in an applicable manner, and policymakers, in turn, tend to focus on operational motivations. The gap widens considerably when foreign, security and defence policy within the complex institutional structures of the European Union is considered. In addition to these well known barriers to evidence-based policy, there are two more obstacles in the defence and security space: sovereignty and dispersed decision-making. A dialogue of best practices must be opened up to broker knowledge in the EU context.     

Integrating Public Deliberation into Engineering Systems: Participatory Technology Assessment of NASA’s Asteroid Redirect Mission

We discuss an experiment employing participatory technology assessment (pTA), a public deliberation method for eliciting lay citizen input prior to making decisions about science and technology to inform upstream engineering decisions concerning technical aspects of NASA’s Asteroid Initiative. In partnership with NASA, the Expert and Citizen Assessment of Science and Technology network conducted a pTA forum on NASA’s Asteroid Initiative in 2014. The goal of the exercise was to assess citizens’ values and preferences about potential asteroid detection, asteroid mitigation, and exploration-based technologies associated with NASA’s Initiative. This article discusses the portion of the forum that focused on the Asteroid Redirect Mission, an effort to redirect an asteroid into lunar orbit that astronauts can study. The forum sought public input on two options for performing the mission that NASA included in technical assessments to make a down select decision: Option A to capture a 10-meter-diameter asteroid; or Option B to redirect a several-meters-diameter boulder from the surface of a larger asteroid. We describe the values and perceptions participants had about Option A and B, how these results were used by NASA managers, and the impact the results of the pTA had on the down select.