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181.
ABSTRACT In most treatments of nonparametric regression, it is assumed that the marginal density of the explanatory variables is strictly bounded away from zero and infinity. This note investigates the pointwise asymptotics for nonparametric regression when this assumption fails, that is, the marginal density of the explanatory variable has either an isolated zero or a pole at the point of interest. 相似文献
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Objective. Smoking and obesity are associated with significant wage penalties when considered separately. We assess the combined effects of those behaviors. Methods. We estimate the effects of smoking and obesity on wages using multivariate regression analysis with 1979 National Longitudinal Survey of Youth data. Results. The raw data indicate that obese smokers experience large earnings penalties. However, these penalties are not found to be interactive or directly causal for most of the demographic subgroups we examine. One exception is the wage penalty associated with obesity for females, which remains significant throughout the analysis. Conclusions. In the absence of a demonstrable direct causal effect of those behaviors on wages, associated individual‐specific socioeconomic factors appear to be the driving forces behind the obese smoker wage penalty. Not included, but potentially significant, are the effects of employer and customer discrimination against obese smokers and the possible labor policy implications of such discrimination. 相似文献
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Wildlife-human interactions are increasing in prevalence as urban sprawl continues to encroach into rural areas. Once considered
to be unsuitable habitat for most wildlife species, urban/suburban areas now host an array of wildlife populations, many of
which were previously restricted to rural or pristine habitats. The presence of some wildlife species in close proximity to
dense human populations can create conflict, forcing resource managers to address issues relating to urban wildlife. However,
evidence suggests that wildlife residing in urban areas may not exhibit the same life history traits as their rural counterparts
because of adaptation to human-induced stresses. This creates difficulty for biologists or managers that must address problems
associated with urban wildlife. Population control or mitigation efforts aimed at urban wildlife require detailed knowledge
of the habits of wildlife populations in urban areas. This paper describes the history of wildlife in urban areas, provides
examples of wildlife populations that have modified their behavior as an adaptation to urban stresses, and discusses the challenges
that resource managers face when dealing with urban wildlife. 相似文献
187.
Behavioral and electrophysiological evidence suggests a gradual, experience‐dependent specialization of cortical face processing systems that takes place largely in the 1st year of life. To further investigate these findings, event‐related potentials (ERPs) were collected from typically developing 9‐month‐old infants presented with pictures of familiar and unfamiliar monkey or human faces in 2 different orientations. Analyses revealed differential processing across changes in monkey and human faces. The N290 was greater for familiar compared to unfamiliar faces, regardless of species or orientation. In contrast, the P400 to unfamiliar faces was greater than to familiar faces, but only for the monkey condition. The P400 to human faces differentiated the orientation of both familiar and unfamiliar faces. These results suggest more specific processing of human compared to monkey faces in 9‐month‐olds. 相似文献
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Nickie Charles 《The Sociological review》1995,43(4):617-640
This paper explores the relationship between feminist politics and the state around the issue of domestic violence. Its focus is the refuge movement in Wales. Feminist analyses of the state and feminist political practice identify the state as an important object of struggle. A particular form of feminist politics, the refuge movement, has engaged with the state while retaining its autonomy. It has been instrumental in effecting legal changes which bestow certain rights on women threatened with domestic violence, and in increasing women's access to resources in the form of temporary refuge and permanent housing. Feminist political practice can affect the distribution of resources through engaging with the state, thereby enabling women to challenge the gendered power relations which structure their daily lives. 相似文献