Controlling the False Discovery Rate: A New Application to Account for Multiple and Dependent Tests in Local Statistics of Spatial Association

Assessing the significance of multiple and dependent comparisons is an important, and often ignored, issue that becomes more critical as the size of data sets increases. If not accounted for, false-positive differences are very likely to be identified. The need to address this issue has led to the development of a myriad of procedures to account for multiple testing. The simplest and most widely used technique is the Bonferroni method, which controls the probability that a true null hypothesis is incorrectly rejected. However, it is a very conservative procedure. As a result, the larger the data set the greater the chances that truly significant differences will be missed. In 1995, a new criterion, the false discovery rate (FDR), was proposed to control the proportion of false declarations of significance among those individual deviations from null hypotheses considered to be significant. It is more powerful than all previously proposed methods. Multiple and dependent comparisons are also fundamental in spatial analysis. As the number of locations increases, assessing the significance of local statistics of spatial association becomes a complex matter. In this article we use empirical and simulated data to evaluate the use of the FDR approach in appraising the occurrence of clusters detected by local indicators of spatial association. Results show a significant gain in identification of meaningful clusters when controlling the FDR, in comparison to more conservative approaches. When no control is adopted, false clusters are likely to be identified. If a conservative approach is used, clusters are only partially identified and true clusters are largely missed. In contrast, when the FDR approach is adopted, clusters are fully identified. Incorporating a correction for spatial dependence to conservative methods improves the results, but not enough to match those obtained by the FDR approach.     

The Transmigration of Rights: Women,Movement and the Grassroots in Latin American and Caribbean Communities

In order to better understand both the global and local contours and impact of transnationalism as a political and cultural force, this article suggests the need for an exploration of shifting gender roles and expectations as they are becoming manifest in situated arenas. The awkwardness of transposing an international rights discourse into local communities and settings deeply infused with tradition, or onto grassroots nationalist movements that work to resist foreign impositions is a widely recognized concern. At the same time, the influence of diaspora populations is seen to leaven and situate global discourse for local movements in a sending country and translates more local interests into global concerns in important and effective ways. Transnational feminist discourse now often concerns itself with the different strategies employed by diasporas, the strategic uses of global discourse, and the meaningful efforts to resist it. Through illustrations drawn from a study of women refugees in El Salvador, the Haitian democracy movement, and a rural Brazilian women's organization, this article links the experience of transmigration to women's mobilizing efforts and the proliferation of rights discourses.     

Googling the Grey: Open Data,Web Services,and Semantics

Primary data, though an essential resource for supporting authoritative archaeological narratives, rarely enters the public record. Lack of primary data publication is also a major obstacle to cultural heritage preservation and the goals of cultural resource management (CRM). Moreover, access to primary data is key to contesting claims about the past and to the formulation of credible alternative interpretations. In response to these concerns, experimental systems have implemented a variety of strategies to support online publication of primary data. Online data dissemination can be a powerful tool to meet the needs of CRM professionals, establish better communication and collaborative ties with colleagues in academic settings, and encourage public engagement with the documented record of the past. This paper introduces the ArchaeoML standard and its implementation in the Open Context system. As will be discussed, the integration and online dissemination of primary data offer great opportunities for making archaeological knowledge creation more participatory and transparent. However, different strategies in this area involve important trade-offs, and all face complex conceptual, ethical, legal, and professional challenges.     

The children of Kaminaljuyu: Isotopic insight into diet and long distance interaction in Mesoamerica

Known for its spectacular tombs and adobe talud–tablero architecture, the highland Guatemalan city of Kaminaljuyu is key to models of long distance interaction in Mesoamerica. We use stable isotopic data from human bone, dentine and tooth enamel to reconstruct Kaminaljuyu’s dietary history. Stable carbon isotope ratios and alkaline earth ratios of enamel carbonate indicate a decline in maize consumption from Preclassic to Classic periods, perhaps due to the desiccation of Lake Miraflores, which was used to irrigate Late Preclassic fields. Stable oxygen and strontium isotope ratios in enamel shed light on the geographic origin of Early Classic skeletons, and show that the central skeletons in the tombs were local children. However, four decapitated skulls and two peripheral skeletons show enriched oxygen ratios, similar to Lowland Maya sites. Strontium isotope ratios indicate that most of these are from an area underlain by Cretaceous limestones; one is from a metamorphic region. Two individuals may have traveled to or from Central Mexico. The greater evidence for lowland individuals among the tomb skeletons implies that political connections with the Maya area were more significant to elites at Kaminaljuyu than was direct contact with Central Mexico.     

Hope and everyday crisis: Young adult experiences in COVID-free Tasmania

The COVID-19 pandemic is characterised by more than mass viral spread. Interviews with young adults in the Australian island-state of Tasmania narrate how COVID-19 is shared socially, economically, and biologically, but not equally. During the time interviews were done, border policies separated Tasmania from mass infections experienced elsewhere, giving us an opportunity to understand how separation does not equate with a lack of socio-material and emotional impact from the pandemic. Recognising spatially diverse impacts of the COVID-19 pandemic means becoming more reflexively aware of the structural inequalities informing how it has been experienced, particularly in the early period of the pandemic. We warn against exclusionary narratives of the pandemic that do not value impacts on those without high physical risk or exposure to the virus. Responding to such exclusionary narratives involves promoting a form of hope that is reflexive, self-aware, and critical. We develop on these aims by reference to the themes of COVID-19 as a syndemic, the temporal narrative of a boom-bust cycle, and COVID-19 as a crisis in everyday life.     

Discipline,Self-discipline and Legacy: Military and Regimental Savings Banks in India

Military and regimental savings schemes have not attracted a great deal of attention in accounts of colonial India yet they were part of daily life for many soldiers. The East India Company introduced savings banks as one of a number of measures to deal with the problem of indiscipline among the troops, but fairly quickly they were being used in other ways: as a marketing tool to recruit better quality troops and to appeal to entrepreneurs who wanted to use their time in the army as a means to self-improvement and prosperity. Several years later a royal warrant established regimental banks for the queen's troops wherever they served. Many thousands of soldiers used regimental savings banks and they provide important insights into the workings of the army in Victorian Britain and British India that have hitherto been neglected.