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ABSTRACT We consider the problem of integrating spatial amenities into locational equilibrium models with multiple jurisdictions. We provide sufficient conditions under which models that assume a single housing price in each community continue to apply in the presence of location‐specific amenities that vary both within and across communities. If these conditions are satisfied, the models, estimation methods, and results in Epple and Sieg (1999) are valid in the presence of (potentially unobserved) location‐specific amenities. We also show how to construct sufficient statistics that capture location specific spatial heterogeneity. We apply these techniques using data from the Pittsburgh metropolitan area. We find that these amenity measures capture proximity to important local employment centers as well as heterogeneity in school quality within a given school district.  相似文献   
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Clovis points are the principal diagnostic artifacts of a Clovis complex that spread across North America between ca. 11,050–10,800 radiocarbon years before present. Clovis may be the best documented Paleoamerican culture in North America, but much remains to be learned about the movement and interactions of Clovis peoples. Similarities among Clovis points from geographically diverse locations have led some researchers to suggest that a uniform projectile point technology existed across North America during Clovis times. Others have rejected this idea, proposing local and independent technological adaptations to different regional environments. To investigate these ideas, we used digital morphometrics to analyze 50 Clovis points from nine different contexts. First, 3D surface models of the points were created with a portable laser scanner. Next, these models were digitally cross-sectioned through both faces, yielding two-dimensional isoheight contours of flake scar patterns that reflect the original reduction techniques used to shape the projectile points. In the final step, the contours were transformed with elliptic Fourier analysis into Fourier coefficient series, and patterns of variation and symmetry were explored with principal components analysis. When compared to modern Clovis point replicas made by an expert knapper, the flake scar contours of the ancient Clovis points showed little morphological variation and a large degree of bifacial symmetry. Our results support the existence of a widespread standardized “Clovis” knapping technique, most likely transmitted through direct interaction between knappers from different groups.  相似文献   
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The practice of cross-timber log construction was one of the several culture traits the European immigrants brought to America beginning in the 17th century. Contrary to the opinions held by some observers, the tradition of log construction was introduced and implemented by the immigrants at different locations and different times. A familiarity with the evolution and characteristics of the European antecedents of log architecture is essential to the study of log construction in the United States. This study explores log architecture in a Finnish setting. Except for having contributed toward the development of the North European log construction technique before the migration to Finland, log architecture as practiced in Finland at the time of emigration to America, was more North European in character than “Finnish.” Moreover, folk traditions were in the process of change as they were subject to exposure to the invading industrial culture in the 19th century. The changes are manifest in log architecture as practiced at the time in Finland and on the cultural landscape the immigrants established in the United States.  相似文献   
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John Trenchard's and Thomas Gordon's ‘Cato’ has generally been seen by historians as the embodiment of neo-Harringtonianism and the polar opposite of Bernard Mandeville's thought. This paper addresses that misreading and places Trenchard and Gordon within a tradition of liberal republican political thought, rather than a civic humanist or neo-roman tradition. It examines the relationship between the political, philosophical and religious beliefs of Trenchard and Gordon and those of Mandeville, arguing that they shared a common framework with respect to the problems of politics.  相似文献   
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