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101.
Sociological research on high school dropouts is largely concerned with who drops out of school and why. Research on the consequences of dropping out is less common. There are clear theoretical reasons to expect dropping out to have a direct and negative effect on life outcomes; however, empirically evaluating these theories is difficult because students who drop out are different from high school graduates in meaningful and complex ways. In this article, I first provide a brief review of sociological research on high school dropouts, emphasizing the demographics of dropouts and reasons for dropping out. I then discuss the possible role of human capital differences, signaling theory, and social closure in creating worse outcomes for high school dropouts and outline the empirical challenges to researching the effects of dropping out. I conclude by discussing avenues for future research and important unanswered questions about the consequences of dropping out.  相似文献   
102.
This paper examines the role of informal job search methods on the labour market outcomes of displaced workers. Informal job search methods could alleviate short-term labour market difficulties of displaced workers by providing information on job opportunities, allowing them to signal their productivity and may mitigate wage losses through better post-displacement job matching. However if displacement results from reductions in demand for specific sectors/skills, the use of informal job search methods may increase the risk of job instability. While informal job search methods are associated with lower wage losses, they lead to increased job instability and increased risk of subsequent job displacement.  相似文献   
103.
104.
This paper is concerned with interval estimation of an autoregressive parameter when the parameter space allows for magnitudes outside the unit interval. In this case, intervals based on the least-squares estimator tend to require a high level of numerical computation and can be unreliable for small sample sizes. Intervals based on the asymptotic distribution of instrumental variable estimators provide an alternative. If the instrument is taken to be the sign function, the interval is centered at the Cauchy estimator and a large sample interval can be created by estimating the standard error of this estimator. The interval proposed in this paper avoids estimating this standard error and results in a small sample improvement in coverage probability. In fact, small sample coverage is exact when the innovations come from a normal distribution.  相似文献   
105.
The case-based approach to learning is popular among many applied fields. However, results of case-based education vary widely on case content and case presentation. This study examined two aspects of case-based education—outcome valence and case elaboration methods—in a two-day case-based Responsible Conduct of Research (RCR) ethics education program. Results suggest that outcome information is an integral part of a quality case. Furthermore, valence consistent outcomes may have certain advantages over mixed valence outcome information. Finally, students enjoy and excel working with case material, and the use of elaborative interrogation techniques can significantly improve internally-focused ethical sensemaking strategies associated with personal biases, constraints, and emotions.  相似文献   
106.
There is a wealth of evidence that disabled people experience far higher levels of unemployment and underemployment than non‐disabled peers. Yet hitherto sociologists have paid scant attention to the structural causes of this issue. Drawing on a socio/political or social model of disability perspective this paper argues for a reconfiguration of the meaning of disability and work in order to address this problem. It is also suggested that such a strategy will make a significant contribution to the struggle for a fairer and equitable global society.  相似文献   
107.
The study of terrorism and political violence has been characterized by a lack of generalizable theory and methodology. This essay proposes that social movement theory can contribute a necessary conceptual framework for understanding terrorism and thus reviews the relevant literature and discusses possible applications. Terrorism is a form of contentious politics, analyzable with the basic social movement approach of mobilizing resources, political opportunity structure, and framing. Cultural perspectives call attention to issues of collective identity that allow for sustained militancy, and movement research recommends alternative conceptions of terrorist networks. Previous research on movement radicalization, repression, and cycles of contention has direct bearing on militancy. Emerging perspectives on transnational collective action and the diffusion of tactics and issues informs an understanding of contemporary international terrorism. Research on movement outcomes suggests broader ways of considering the efficacy of political violence. Finally, methodological debates within the study of social movements are relevant for research on terrorism. In sum, a social movement approach to terrorism has much to contribute, and research on terrorism could have important extensions and implications for social movement theory.  相似文献   
108.
Colin Aitken first became interested in sampling in the context of the administration of justice when the case of US versus Shonubi was brought to his attention. Shonubi was a Nigerian working in New York. He was arrested at Kennedy Airport when seen behaving in a suspicious manner in the baggage hall, having returned on a flight from Nigeria. He was found to have 103 bags of a white substance inside him, four of which were examined. The white substance was identified as heroin. Shonubi was arrested, tried and found guilty of drug smuggling. The question then arose as to the length of sentence he should be given.  相似文献   
109.
In ‘experience-weighted attraction’ (EWA) learning, strategies have attractions that reflect initial predispositions, are updated based on payoff experience, and determine choice probabilities according to some rule (e.g., logit). A key feature is a parameter δ that weights the strength of hypothetical reinforcement of strategies that were not chosen according to the payoff they would have yielded, relative to reinforcement of chosen strategies according to received payoffs. The other key features are two discount rates, φ and ρ, which separately discount previous attractions, and an experience weight. EWA includes reinforcement learning and weighted fictitious play (belief learning) as special cases, and hybridizes their key elements. When δ= 0 and ρ= 0, cumulative choice reinforcement results. When δ= 1 and ρ=φ, levels of reinforcement of strategies are exactly the same as expected payoffs given weighted fictitious play beliefs. Using three sets of experimental data, parameter estimates of the model were calibrated on part of the data and used to predict a holdout sample. Estimates of δ are generally around .50, φ around .8 − 1, and ρ varies from 0 to φ. Reinforcement and belief-learning special cases are generally rejected in favor of EWA, though belief models do better in some constant-sum games. EWA is able to combine the best features of previous approaches, allowing attractions to begin and grow flexibly as choice reinforcement does, but reinforcing unchosen strategies substantially as belief-based models implicitly do.  相似文献   
110.
Political recognition of the parlous state of English social care and the urgent need for radical reform led to calls for new policy approaches that address the two key problems it faced: inadequate funding and poor quality and inappropriate provision. The New Labour government was convinced that it had found a way of dealing with these two competing problems and it embarked on a policy, which has subsequently gained cross-party support. The centre-piece was the concept of a personal budget, and was introduced with a belief that there would be major cost savings while improving service user satisfaction. This article will critically explore the evidence for whether the strategy is fulfilling that promise.  相似文献   
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