An inter-site comparison of enamel hypoplasia in bison: implications for paleoecology and modeling Late Plains Archaic subsistence

Bison bison mandibular molars from the Late Plains Archaic kill/butchery sites of Buffalo Creek (Wyoming) and Kaplan-Hoover (Colorado) exhibit significant frequencies of dental enamel hypoplasia (DEH), a defect believed to reflect information about physiological status of individual animals. This study provides a methodology to estimate the ontogenetic and seasonal timing of DEH formation in bison dentition. Integration of these estimates with data from bison life history and grassland ecology allows inferences on age- and season-specific factors exacerbating periodic physiological declines that were recorded in the form of enamel hypoplasias. Differences between assemblages indicate regional variability in grassland conditions, with data from Buffalo Creek pointing to recurrent drought that reduced forage capacity and contributed to physiological stress in bison over two consecutive years. Seasons of physiological stress reflected in the DEH correspond to each of the three kill events at the locality, suggesting that predictability of bison behavior in this location was a critical factor in influencing the seasonal timing and location of repeated hunting episodes. Unlike Buffalo Creek, timings of stress episodes are not consistent with season of death in the Kaplan-Hoover bison assemblage, suggesting that favorable grassland conditions were the primary factor influencing timing of this large single-kill event in order to provision for the upcoming winter. DEH analysis represents a developing approach in the construction of models addressing key aspects of local grassland and bison ecology as well as offers unique insights into the hunting strategies and subsistence decisions of Late Plains Archaic foragers.     

The Effect of State Economic Development Incentives on Employment Growth of Establishments

This paper examines the effects of state economic development incentives on the growth of 366 Ohio manufacturing and nonmanufacturing establishments that launched major expansions between 1993 and 1995. Growth is measured as the actual employment change that occurred in these establishments and as the employment growth announced when expansions were launched. Empirical findings indicate that incentives have very little (or even a negative) effect on actual growth and they have a substantial positive effect on announced growth. Findings also suggest that establishments that received incentives overestimated their announced employment targets more than establishments that did not receive incentives.     

In the Shadow of the Moon: A Challenging Journey to Tranquility, 1965-1969

French and Burgess have added yet another book to the enormousliterature on the Space Race. Based partly on oral history interviewsand partly on written and e-mailed statements and other documents,In the Shadow of the Moon focuses on the American side of thesecond half of the Space Race. (French and Burgess dealt withthe first half of the Space Race in a previous work, Into thatSilent Sea.) Between March 1965 and July 1969, the U.S. launched fifteenmanned space missions. In four years and four months, NASA wentfrom     

OPTIMAL HOUSING COST ESTIMATES FOR 177 U.S. METROPOLITAN AREAS

ABSTRACT This research tests the ability of six metropolitan‐level measures of housing costs to predict a benchmark housing cost measure based on Aten's area price level index. The first four measures are calculated with U.S. Census Data, the fifth is based on HUD Fair Market Rents, and the sixth is the housing portion of the ACCRA Index. In 25 large metropolitan areas, the fourth measure predicts 86 percent of the variation in the benchmark index in 1990 and 85 percent in 2000. The fifth measure performs nearly as well. The paper concludes both are promising measures of living costs.     

PRODUCTIVITY AND THE DENSITY OF HUMAN CAPITAL*

ABSTRACT We estimate a model of urban productivity in which the agglomeration effect of density is enhanced by a metropolitan area's stock of human capital. Estimation accounts for potential biases due to the endogeneity of density and industrial composition effects. Using new information on output per worker for U.S. metropolitan areas along with a measure of density that accounts for the spatial distribution of population, we find that a doubling of density increases productivity by 2–4 percent. Consistent with theories of learning and knowledge spillovers in cities, we demonstrate that the elasticity of average labor productivity with respect to density increases with human capital. Metropolitan areas with a human capital stock one standard deviation below the mean realize no productivity gain, while doubling density in metropolitan areas with a human capital stock one standard deviation above the mean yields productivity benefits that are about twice the average. These patterns are particularly pronounced in industries where the exchange of information and sharing of ideas are important parts of the production process.     

Weather sensitivity and climate change perceptions of tourists: a segmentation analysis

ABSTRACT

Many communities rely on tourism spending, so it is important to understand any potential changes to tourist flows resulting from changing climate and weather patterns. However, tourists are not a homogenous group, as they have different motivations, values, and goals. Therefore, the purpose of this investigation is to better understand potentially varying perceptions and behavior of different tourist types, specifically in regards to their weather sensitivity, climate change concern, and behavioral intention for climate change mitigation. Tourists were randomly surveyed at 20 locations throughout the state of Maine in the United States (n = 704). Segmentation analysis on the activities tourists participated in yielded three segments of Maine tourists: non-nature-based tourists (50.6%), nature-based generalists (16.2%), and nature-based specialists (33.2%). Differences across segments were explored for perceptions of weather impacts, climate change concern, and mitigation intent. Additionally, weather sensitivity was analyzed based on type of overnight accommodations to better understand if this also had a role in differences. Non-nature-based tourists thought that weather variables were less influential during their travels in Maine than the other segments, while nature-based generalists perceived weather to have the highest influence. Additionally, nature-based specialists had the highest level of climate change belief, while nature-based generalists had the highest willingness to engage in climate change mitigation behavior. Results are useful to understand how segments of tourism demand may be altered with a changing climate, such as increased temperatures, precipitation, and storms, and what groups may be the most beneficial to target for marketing or educational efforts to reduce the impact of climate change.     

Scotland’s Electoral Geography Differed from the Rest of Britain’s in 2017 (and 2015) – Exploring its Contours

The rapid expansion in support for the Scottish National Party (SNP) between the 2010 and 2015 general elections substantially changed the country’s electoral geography, as again did its relative decline at the next election in 2017. At that last contest, however, the SNP won many seats with fewer than 40% of the votes cast, a situation very different from that in the rest of Great Britain. That difference – which had a considerable impact on the formation of a government in June 2017 – came about because of the nature of the competition in individual seats.     

Rural out-migration and economic standing in a prairie setting

"This study attempts to trace the determinants of rural out-migration for a typical portion of the Canadian Prairies, namely agricultural Manitoba. In concentrating on the 'push' factors responsible for gross out-migration over the period 1966-71, the study considers aspects of several dimensions: spatial, economic, social, ethnic and demographic. However, in order to explore the ramifications of interaction between migration and these multifaceted factors, a model is construed which dwells not only on the forces responsible for out-migration, per se, but also on those capable of regulating rural economic structure and agricultural welfare."