Improved cross-entropy method for estimation

The cross-entropy (CE) method is an adaptive importance sampling procedure that has been successfully applied to a diverse range of complicated simulation problems. However, recent research has shown that in some high-dimensional settings, the likelihood ratio degeneracy problem becomes severe and the importance sampling estimator obtained from the CE algorithm becomes unreliable. We consider a variation of the CE method whose performance does not deteriorate as the dimension of the problem increases. We then illustrate the algorithm via a high-dimensional estimation problem in risk management.     

Examining the structure of awareness and perceptions of groundnut aflatoxin among Ghanaian health and agricultural professionals and its influence on their actions

This study uses a modified health belief model (HBM) within a socio-economic framework to evaluate the influence of awareness and knowledge on actions to reduce aflatoxin (AF) contamination in groundnuts (peanuts). Data were collected in 2002 through a self-administered questionnaire from a sample of 367 individuals. Socio-economic factors affecting perceptions, awareness, knowledge, and action were examined using structural equation modeling. The perceived benefits of good quality groundnuts and/or groundnut products were the most important determinants of awareness and knowledge of AF among agricultural and health professionals in Ghana. Awareness, in turn, had a significant causal effect on the professionals’ decisions to take actions to increase the level of awareness of AF in the society. Demographic factors, such as gender and level of education significantly influenced knowledge of AF and the perception of the benefits of good quality groundnut. Type of profession had a significant influence on awareness and perceived seriousness of the AF problem. Education was a significant determinant of awareness of AF in groundnuts. The study generates important information for policy decision making when considering resource allocation to reduce food contamination in developing economies.     

The role of relationships in labor markets for the popular arts and its impact on product quality

While utilizing social networks is common in labor markets and may benefit both firms and laborers, social networks are argued to be unusually important in the popular arts. Prior work in economics on the role of relationships in labor markets has generally focused on the benefits and not the costs. This paper takes a different approach by focusing on both costs and benefits, by examining a specific market where relationships are particularly important. This paper argues that in addition to reducing diversity and creating inherent inequalities, excessive reliance on networks can lead to higher agency costs and lower product quality.     

A Comparative Analysis of Propositions Describing Social Movement Organizations*

Natural history, observational, and interview data from a study of two anti-pornography crusades and the social movement organizations which created and directed them are used to assess nine propositions formulated by Zald and Ash (1966) concerning the structure and dynamics of social movement organizations. The Zald-Ash propositions were formulated from the literature on national, established social movement organizations. This paper explores the applicability of the propositions to those organizations which are small and emerging. The propositions are generally supported. Discrepancies are accounted for by the significant influence of leadership orientation, goal specificity, and incentive structure in determining other structural and dynamic characteristics of small or emerging social movement organizations.     

Financial Penalties Under the Temporary Assistance for Needy Families Program: Policy Discourse and Strategies for Reform

Many families did not leave welfare of their own accord but instead were forced off, sanctioned, for failure to conform to new, strict requirements (Bloom & Winstead, 2002). Studies of leavers indicate that many of these leavers are among the families that do not receive needed health insurance, food stamps, and child care assistance for which they remain eligible (Loprest, 2001; Zedlewski & Gruber, 2001). Sanctioned families are less likely to do well after leaving welfare compared to other leavers (Goldberg & Schott, 2000). As part of TANF reauthorization, Congress should prohibit states from sanctioning if they have not met certain requirements: conducted an assessment, made accommodations for people with physical/mental impairments or other barriers, and instituted strong pre-sanction and post-sanction procedures.     

How business associations use interorganizational networks to achieve workforce development goals: Implications for Human Resource Development

Abstract

This study uses data from a series of comparative case studies to analyse the interorganizational networks of business associations providing workforce development services in the United States. Three aspects of the networks were of particular interest, including (a) the form the partnerships took, (b) the trade-off to involving educational or community vs. business partners in providing workforce development services and (c) the strengths of associations in brokering services to adults or youth. The findings demonstrate that business associations work in intermediary networks or provide their services directly. The conclusions suggest that human resource development professionals should work more actively with local business associations to recruit, train and provide supports for workers in US firms.     

Life Years Lost at Hazardous Waste Sites: Remediation Worker Fatalities vs. Cancer Deaths to Nearby Residents

We present a hypothetical case study using the Years of Potential Life Lost (YPLL) metric to compare cancer risks incurred by residents living near a Superfund site to occupational fatality risks incurred by workers employed in that site's remediation. Since cancer occurs late in life, and because we assume its mortality rate is 60%, each case results in 8.8 YPLL. Each occupational fatality, which typically occurs earlier in life, results in 38.1 YPLL. In our case study, the residential population of 5000 incurred 1.3 YPLL, compared to 5.7 YPLL incurred by the 500 workers. Several uncertain assumptions may influence our calculations; moreover, occupational risks may be viewed as more "voluntary" than risks incurred by residents. However, because the magnitude of the YPLL incurred by workers and residents may be comparable, risk managers should consider occupational risks when evaluating remedial alternatives.     

Between a rock and a hard place: second-order minorities in the Aceh conflict

Secessionist movements are often motivated by a sense of exclusion, abuse, and assimilation at the hands of host states. But in waging armed struggles and constructing ethnic nationalisms, they may replicate such grievances against their own minorities. This paper seeks to provide a deeper understanding of how ‘second-order minorities’ respond to secessionist ethno-nationalism. Based on ethnographic research in Aceh, Indonesia, this paper looks to how Javanese, Malay, Alas, and Gayo communities responded to Acehnese secessionism. Aceh’s minorities did not support Aceh’s rebels, opting to flee or resist rebellion. In explaining their reaction, I suggest that the same ethno-nationalist project which united many Acehnese in the secessionist struggle served to repel non-Acehnese communities, leading to ethno-nationalist revivals among Aceh’s minorities and continued tensions in the post-conflict era.     

‘Second-order’ ethnic minorities in Asian secessionist conflicts: problems and prospects

This article provides some conceptual foundations for a special issue of Asian Ethnicity concerned with what we call ‘second-order minorities’. If secessionist conflicts involve minorities resisting abusive, assimilationist states, leading rebel groups to embark on their own nation-building efforts, how does this affect the minorities of aspiring secessionist nations? How do the minorities of secessionist groups respond to secessionism? Despite many insightful studies of secessionism and rebel ethno-nationalism, scholars have yet to explore the ways that local minorities navigate secessionist conflicts. We suggest that the relationship between secessionists and second-order minorities depends on three key factors: whether minorities are territorially concentrated or dispersed, indigenous or migrant, and nation majorities or small national minorities. These characteristics provide us some idea of the types of violence and counter-mobilization we might see among second-order minorities faced with secessionist violence. This article then previews the subsequent studies of Xinjiang, Aceh, Mindanao, and Sri Lanka, cases which capture some of the core challenges faced by second-order minorities against twin violent nation-building efforts from state and rebel forces.     

Sexual Behaviors,Sexual Health Practices,and Community Engagement Among Gay and Bisexually Identified Men Living in Rural Areas of the United States

Limited research has focused on the sexual behaviors of men who have sex with men (MSM) from rural communities. We examined the sexual and health-related behaviors of MSM living in rural areas of the United States in order to understand the sexual health repertoire of this population. A total of 5,357 participants living in rural settings were recruited online and completed an anonymous Internet-based survey that assessed sexual behaviors, condom use, and men’s engagement with various community activities and events. These data provide a greater understanding of sexual health profiles that exist among rural MSM and will help inform the design of effective programs for men in these often underserved communities.