A Hierarchical Goal-Programming Approach To Environmental Land Use Management

A mathematical goal programming model is described for the purpose of normative policy evaluation of environmental land use management on the Texas Gulf Coast. The model's three-level hierarchy, linking statewide, multicounty, and local models, allows the explicit consideration of competing goals (policies) at different spatial scales. Microlevel impacts of macrolevel environmental policy decisions, and vice versa, can be assessed.     

FLEXIBLE FORM METHODS FOR MEASURING RENT GRADIENTS*

ABSTRACT We develop and demonstrate an empirical methodology for measuring rent gradients in the presence of consumers that have varying tastes for distance to the city center. We derive easily calculated measures of rent gradients, own price elasticities, and income elasticities. We demonstrate the ease of calculation of these functions, even in the presence of consumers who have nonidentical preferences. We also demonstrate how to test for bias in rent gradient estimation that arises from assuming identical preference functions.     

Spatial accessibility and equity of playgrounds in Edmonton, Canada

Assessing spatial equity with respect to urban public amenity provision involves examining the association between amenity distribution and population need for amenities. Geographic Information Systems in coordination with local spatial autocorrelation, were used to investigate the association between neighbourhood accessibility to playgrounds and demographic and social need for playgrounds in Edmonton, while considering differences in playground quality throughout the city. The primary objectives of this study were to assess whether playground provision, for location and quality, in Edmonton is equitable and, more generally, to investigate the role that amenity quality plays in assessing spatial equity. The results indicate that playgrounds are equitably distributed within Edmonton, with the highest-social-need neighbourhoods having the greatest accessibility to playgrounds. However, once differences in playground quality are considered, there is less of an association between high-social-need and high-accessibility areas. The findings suggest that greater attention be paid to differences in playground quality within Edmonton and that spatial equity researchers give greater consideration to amenity quality when evaluating spatial equity within cities.     

Chemical composition of architectural plaster at the Classic Maya kingdom of Piedras Negras,Guatemala

Architectural plaster from elite masonry structures at the Classic Maya kingdom of Piedras Negras, Guatemala, is examined. Chemical composition is determined through X-ray fluorescence and compared statistically. Based on this sample, it was observed that any single masonry building was coated with plaster made from a single source of limestone and limestone-based aggregate, but that architectural plaster from different buildings across the site varied in chemical composition. It is concluded that this pattern is best accounted for by a model of rotational labor obligations to the state, with spatially distinct groups being responsible for manufacturing plaster for specific buildings.     

The Short History of the Ifugao Rice Terraces: A Local Response to the Spanish Conquest

Establishing the construction sequence of agricultural terraces is extremely complicated due to the nature of their technological foundation and use. A number of methodological approaches have been developed to address this difficulty, such as bulk soil ¹⁴C dating, Optically-Stimulated Luminescence (OSL), sediment grain size, or a combination of these, but a fundamental problem of stratigraphic disturbance still exists. In this article, we utilize multiple datasets, including radiocarbon determinations, faunal isotopic signatures, human osteological remains, archaeobotanical data sets, energetics assessments, and spatial data to establish the origins of Philippine Cordillera rice terraces. Dominant historical narratives in the region suggest a 2000–3000 b.p. inception of the terrace systems, but previous Bayesian modeling and current archaeobotanical, ethnohistorical, and ethnographic data indicate that the shift to wet-rice cultivation is a recent phenomenon and a response to the intrusion of the Spanish Empire in the northern highland Philippines.