Counterfactual geographies: worlds that might have been

This paper argues for a renewed consideration of counterfactuals within geography. Drawing upon Doreen Massey's emphasis on notions of ‘possibility’, ‘chance’, ‘undecidability’ and ‘happenstance’, we argue for an engagement with approaches in the humanities that have addressed such issues directly. We review previous uses of counterfactual method in historical geography, particularly as related to cliometrics and the ‘new economic history’ of the 1960s, but argue that a recent upsurge of interest in other disciplines indicates alternative ways that ‘what-if’ experiments might work in the sub-discipline. Recent counterfactual work outside of geography has had a notably spatial cast, often thinking through the nature of alternative worlds, or using counterfactual strategies that are explicitly concerned with space as well as temporal causality. We set out possible agendas for counterfactual work in historical geography. These include: consideration of the historical geographies within existing counterfactual writings and analyses; suggestions for distinctive ways that historical geographers might think and write counterfactually, including experiments in geographies of happenstance, and the exploration of more-than-human possibilities; analyses of the geography of and in counterfactual writing; and study of the political, ethical and emotional demands that counterfactuals make. This discussion and framework provides an extended introduction to this special feature on counterfactual geographies.     

Personal Tragedy and Presidential Performance: Calvin Coolidge as Legislative Leader

The elevation of Calvin Coolidge to the presidency in the summer of 1923 was impressively smooth. The new president was entirely comfortable in his new role and impressed Washington officialdom with his self-assuredness, political adroitness, and hard work. One of his main initial objectives was to develop a strong and productive relationship with Congress and to lobby it to enact his extensive and progressive legislative agenda. During his first year, he worked vigorously at these tasks and achieved a notable degree of success. However, in July, 1924, the president confronted a devastating personal tragedy–the death of his young son–that left a deep imprint on the remainder of his presidency. He lost interest in legislative affairs and withdrew from interaction with Congress. The result is that he has been ranked among the least successful presidential leaders of Congress in U.S. history. However, incapacitation as a result of severe clinical depression rather than either incompetence or ideology was the precipitating cause.     

Location and Pricing Decisions of a MultiStore Monopoly in a Spatial Market

Abstract.  This article presents an analysis of location and pricing decisions of a monopolist about to open several stores in a compact geographical space. The number of stores is made endogenous by the introduction of fixed costs. A novel methodology is developed, by which the firm's location and price decisions are represented as continuous functions defined over the geographical space. This modeling artifact generates a negligible error but simplifies the solution considerably and allows the derivation of several intuitive results. Although the focus is on one‐dimensional markets, it is shown that the method can easily be adapted to two‐dimensional markets.     

Does Diversity Matter? Measuring the Impact of High School Diversity on Freshman GPA

At the heart of arguments for affirmative action in university admissions are various claims about ethnic diversity. One assertion is that a diverse student body improves the quality of the educational experience: all students learn more. Further, a diverse educational experience better prepares students for the pluralistic society in which they will live. Previous studies examining these issues have been based on informal and survey methods. To better assess the impact of diversity we utilize a data set that allows us to measure student performance at the University of Illinois at Chicago (UIC) as a function of the diversity of a student's high school. Do students from diverse high schools do better in the ethnically diverse environment at UIC? After controlling for other factors that affect GPA, such as ACT, high school rank, and high school quality, we find significant diversity impacts. Depending on the diversity measure, a student from a very diverse high school has an expected first semester GPA that is a one‐fourth to one‐half point higher than a student from a nondiverse high school. The diversity impacts tend to be greater for students in the lower tail of the GPA distribution. There are also large gender differences with females helped most by diversity. Although the results represent outcomes at only one university, they nevertheless serve as a starting point for quantitatively assessing the impact of a diverse learning environment.     

War Shields of the Torricelli Mountains,West Sepik Province,Papua New Guinea

ABSTRACT The usefulness of the term ‘ethnolinguistic group’, as a construct suggesting that ‘differences in language automatically translate into differences in culture’, has been questioned by Welsch, Terrel and Nadolski (1992). Not many researchers would insist on the term ‘automatically’, but would nevertheless support an argument for a strong correlation between material culture and language. As a contribution to this debate, we discuss two types of wood shields of the Torricelli Mountains (one of which is being identified for the first time) and pigskin shields to the south of the Torricellis, their use, and the details of the carved designs of the wood shields. The results of our analysis provide limited support for the correlation of material culture and language but highlight the need for analysis of material culture based on reliable data for a large number and wide range of artefacts, from defined regions, presently held in museums and private collections worldwide.     

An improved PCR method for endogenous DNA retrieval in contaminated Neandertal samples based on the use of blocking primers

Neandertal skeletal remains are usually contaminated with modern human DNA derived from handling and washing of the specimens during excavation. Despite the fact that the distinct Neandertal haplotypes allow the design of specific primer pairs, for instance in most of the mitochondrial DNA (mtDNA) hypervariable region 1 (HVR1), the human contaminants can often outnumber the endogenous DNA, thus preventing a successful retrieval of Neandertal sequences. We have developed a novel PCR method, based on the use of blocking primers that preferentially bind to modern human contaminant DNA and block their amplification, and greatly improve the efficiency of Neandertal DNA retrieval. We tested the method in four El Sidrón Neandertal samples (two teeth and two bone fragments) with different contamination levels and taphonomic conditions, and we have been able to significantly increase the Neandertal yield from figures around 25.23% (5–69.6%) up to 90.18% (75.3–100%).