A spatial duopoly: competition in the western Canadian fur trade, 1770–1835

The period 1770–1835 witnessed the growth and climax of intense fur trade rivalry in western Canada between the Hudson's Bay Company and the North West Company together with independent “peddlers”. This competition had significant spatial consequences, most notably the proliferation of posts on interior waterways, leap-frogging of competitors to more advantageous locations, leading to close clustering of rival posts. This clustering occurred in spite of a bitter and sometimes violent tug-of-war over Indian fur supplies. This locational pattern is examined in the light of Harold Hotelling's concept of duopolistic competition. A spatial duopoly model is described and applied to the fur trade and indicates that the clustering of rival posts was a predictable outgrowth of duopolistic economic forces, rather than an anomalous result of perverse non-economic behaviour. These conclusions are affirmed by observers of the trade at the time of competition and by evidence of spatial change in the locational pattern following the merger of the two rivals in 1821.     

Bone changes in the human skull probably resulting from scurvy in infancy and childhood

Scurvy in children is poorly known in the palaeopathological literature despite biomedical references indicating that bone changes do occur in some cases and should be observable in human skeletal remains. Research on infants' and children's skulls in museum and anatomical collections in the USA and Europe reveals a complex of features on the external surface of the greater wing of the sphenoid and adjacent bone tissue that may be caused by scurvy. The lesions are bilateral and are characterized by porosity and, in some cases, hypertrophic bone formation. These abnormal bone changes are probably the result of a reaction to chronic haemorrhage in the deep vasculature associated with temporalis muscle function. While these lesions resemble those seen in anaemia and infection, their distinctive anatomical location and association with chewing should differentiate them, in most cases, from other disease conditions. These features are also associated with porous, hypertrophic lesions of the orbital roof and provide additional evidence that caution is needed in attributing porous lesions of the orbital roof solely to anaemia. © 1997 John Wiley & Sons, Ltd.     

The wellsprings of candidate emergence: Geographic origins of statewide candidacies in the United States

Candidates and nominees for statewide office in the United States do not emerge from random locations within states. In this paper, we argue that densely populated areas are more likely to both foster political ambition and to afford the resources that enable candidates to wage an effective campaign. Candidates and nominees for major statewide office originate from populous counties in numbers significantly out of proportion to these counties’ share of their state’s population. Meanwhile, aspirants virtually never emerge out of rural areas or small towns. The pattern holds for all candidates and nominees for both Senate and governor and for both major political parties. Regional biases are more pronounced for institutionally strong gubernatorial offices than for weak offices and among high quality nominees for statewide office than among inexperienced candidates. Given the importance of urban/rural cleavages in the American electorate, these findings raise fundamental questions about political representation.     

Increasing Behavioral Flexibility? An Integrative Macro-Scale Approach to Understanding the Middle Stone Age of Southern Africa

The Middle Stone Age (MSA) of southern Africa represents a period during which anatomically modern humans adopted a series of diverse cultural innovations. Researchers generally attribute these behavioral changes to environmental, neurological, or demographic causes, but none of these alone offers a satisfactory explanation. Even as patterns at site level come into focus, large-scale trends in cultural expansions remain poorly understood. This paper presents different ways to view diachronic datasets from localities in southern Africa and specifically tests hypotheses of environmental and cultural causality. We employ an array of analyses in an attempt to understand large-scale variability observed during the MSA. We evaluated the diversity of stone tool assemblages to model site use, examined transport distances of lithic raw materials to understand patterns of movement, assessed the cultural capacities required to manufacture and use different sets of tools, applied stochastic models to examine the geographic distribution of sites, and reconstructed biome classes and climatic constraints. Our large-scale analysis allowed the research team to integrate different types of information and examine diachronic trends during the MSA. Based on our results, the range of cultural capacity expanded during the MSA. We define cultural capacity as the behavioral potential of a group expressed through the problem-solution distance required to manufacture and use tools. Our dataset also indicates that the actual behavior exhibited by MSA people, their cultural performance as expressed in the archaeological record, is not equivalent to their cultural capacity. Instead we observe that the main signature of the southern African MSA is its overall variability, as demonstrated by changing sets of cultural performances. Finally, at the scale of resolution considered here, our results suggest that climate is not the most significant factor driving human activities during the MSA. Instead, we postulate that behavioral flexibility itself became the key adaptation.     

Midden or Molehill: The Role of Coastal Adaptations in Human Evolution and Dispersal

Coastal adaptations have become an important topic in discussions about the evolution and dispersal of Homo sapiens. However, the actual distribution and potential relevance of coastal adaptations (broadly, the use of coastal resources and settlement along shorelines) in these processes remains debated, as is the claim that Neanderthals exhibited similar behaviors. To assess both questions, we performed a systematic review comparing coastal adaptations of H. sapiens during the African Middle Stone Age (MSA) with those of contemporaneous Neanderthals during the European Middle Paleolithic. In both species, systematic use of marine resources and coastal landscapes constitutes a consistent behavioral signature over?~?100,000 years (MIS 6–3) in several regions of Africa and Europe. We found more similarities than differences between Neanderthals and modern humans, with remaining disparities all in degree rather than kind. H. sapiens exploited a wider range of marine resources—particularly shellfish—more intensively. MSA shellfish-bearing sites are also more often associated with intense occupations on coastal landscapes, and more evidence of complex material culture such as shell beads. In terms of broader ramifications, Pleistocene coastal adaptations are best conceived of as an ‘add-on’ to previous adaptive strategies, complementing more frequently exploited inland resources and landscapes. Still, Neanderthals and modern humans increased their dietary breadth and quality, and added options for occupation and range expansion along coastlines. Potential evolutionary implications of these multi-generational behaviors include higher intakes of brain-selective nutrients as a basis for neurobiological changes connected to increased cognitive capacities, but also greater reproductive success, dispersal abilities and behavioral flexibility. Whether gradual differences between modern humans and Neanderthals stimulated different evolutionary trajectories is a question for future research.