Conceptualizing voter choice for directional and discounting models of two-candidate spatial competition in terms of shadow candidates

In contrast to the traditional modeling of voter choice based on proximity, under directional models, selection of candidates is based on the direction and/or intensity of change from a status quo or neutral point. Voter choice can also be modeled as representing both approaches, e.g., as a directional model with proximity restraint, or alternatively, in terms of proximity to discounted positions. We provide a unified perspective for these seemingly disparate models in terms of what we call “shadow” positions. We demonstrate that voter choice in a variety of spatial models including directional components can be viewed as proximity-based choices. Voters choose the candidate whose shadow is nearer, where shadow locations are defined by a simple transformation. We apply this approach to equilibrium analysis, showing that results for a discounted proximity model can be carried over – via shadows – to a variety of directional models.     

The United Nations and genocide: Prevention,intervention, and prosecution

Conclusion The UN has to date not been effective in preventing genocide, and has had only a slightly better record in stopping it. There have been occasions when its interventions has occurred only after a genocide has taken place, and even then its major focus has been on facilitating the provision of aid by non-governmental agencies rather than on the task of tracking down the perpetrators and bringing them to justice. The exceptions of the ICTY and the ICTR are so stark, in this regard, that they only serve to throw light on the many other genocidal events where the UN has not initiated measures against those responsible for carrying them out. In short, as a body the UN has no—until very recently—even approached the fulfillment of its mandate as articulated in the Convention on the Prevention and Punishment of the Crime of Genocide, and only rarely invoked Chapter VII of the UN Charter in order to intervene physically for the purpose of countering threats to peace or stopping conflict. Its strengths, so far as there have been any, have focused on balancing great power interests with demands to intervene more forcefully. While in the years up to 1989 this could be seen as a way of maintaining the peace (albeit over the broken bodies of victims of genocide in places such as Biafra, Cambodia, and East Timor), since then the UN has been required to act with greater resolve and purpose. The failures of Bosnia, Rwanda, and Kosovo must thus be seen as having been brought on by a transition from one international regime to another; from a Cold War regime in which the UN—s main role was one of preventing a third (and possibly nuclear) World War from breaking out, to a post-Cold War regime which appears increasingly to be characterized by the UN searching for a new role in which humanitarian issues are to assume a higher priority than they once did. Whether or not this will continue, of course, will depend on an extremely wide variety of circumstances—and at this time it is likely that only a few of these can accurately be anticipated.     

Nash equilibrium strategies in directional models of two- candidate spatial competition

The standard approach to two-party political competition in a multi-dimensional issue space models voters as voting for the alternative that is located closest to their own most preferred location. Another approach to understanding voter choice is based on preferred direction of change with respect to some specified neutral point (e.g., an origin or status quo point). For the two-dimensional Matthews directional model (Matthews, 1979), we provide geometric conditions in terms of the number of medians through the neutral point for there to be a Condorcet (undominated) direction. In this two-dimensional setting, the set of residual locations for which no Condorcet directions exist is identical to the null dual set (Schofield, 1978) and to the heart (Schofield, 1993). In two dimensions, for most locations of the origin/status quo point, a Condorcet direction exists and points toward the yolk, a geometric construct first identified by McKelvey (1986). We also provide some simulation results on the size of the null dual set in two dimensions when the underlying distribution of points is non-symmetric.     

The Tax Revolt and Electoral Competition

This paper explores the effect of electoral competition onstate and local expenditures in the US during the politicalenvironment following the tax revolt of the late 1970s. Itutilizes a theoretical model in which both electoralcompetition and tax and expenditure limits impact spending.Empirical results indicate the tax revolt's primary impact wastransmitted through political candidate competition, notthrough the adoption of tax or expenditure limitations, as iscommonly believed. However, tax and expenditure limits doaffect public education expenditures.     

Development of a methodology for the standardisation and improvement of ‘Smartphone’ photography of patterned bruises and other cutaneous injuries

Human bite-mark analyses can play a prominent role in forensic case investigations, including those involving sexual assault. High-quality photographs routinely secure a link between a bite-mark and an individual's dentition. Access to around the clock forensic photography, however, is often limited, resulting in delay and/or missed opportunities to record valuable evidence. The emergence of Smartphone high-quality photographic technology now provides a previously unimagined opportunity to gather timely forensic photographic evidence. Problems can arise, however, due to the relatively poor quality of the photographs, as a result of many of those taking photographs having received little or no forensic photography training. This study compares unassisted photography with assisted photography, by a specifically developed camera application (App), to provide a standardised method for taking forensic photographs. An App, written in Java, was hosted on the Google Android Operating System, on a Samsung Galaxy SII Smartphone. Twenty-four volunteers participated in a study to photograph a pseudo bite-mark using three methods, (1) unassisted (as a control), (2) assisted by an ABFO No.2 right-angled photographic reference scale and (3) assisted by the App. The App, method (3), was shown to consistently outperform methods (1) and (2), demonstrating greater standardisation and precision (p < 0.001). Analysis of the data showed the extent to which acquiring an accurate photograph depends on the image being orthogonal to the camera. It appears likely that the relatively inaccurate photographs acquired by methods (1) and (2), were as a result of deviation from the plane, orthogonal to the bite-mark. Therefore, the App was successful in ensuring that the camera was both orthogonal and at an appropriate distance, relative to the bite-mark. Thus, the App enhanced the abilities of non-experts to acquire more accurate photographs and created the potential to significantly improve the quality of forensic photographs.