A COMPARATIVE PERSPECTIVE ON RACIAL RESIDENTIAL SEGREGATION:

This article takes a first step to compare the residential segregation of blacks and Asians from whites in American and Canadian cities. The analysis is based on census data from 404 American and 41 Canadian cities. African Americans in the United States experience a higher level of residential segregation than Asians in U.S. cities. On the other hand, blacks in Canada experience the same low level of segregation as Asians. To explain the different experiences of blacks in the United States and Canada, a multivariate model is proposed and tested. The results reveal several patterns. First, African Americans are consistently obstructed much more than Asian Americans by their proportion in the city. In contrast blacks in Canada are not. Second, the residential segregation patterns of African Americans are affected strongly by the labor market and strucutral changes of the economy in the city. However, the structural change of the economy in the city has a very weak effect on the level of residential segregation of Asian Americans, black Canadians, and Asian Canadians.     

Electric-Utility Resource Planning and Decision-Making: The Importance of Uncertainty

Uncertainty is a critical factor that pervades all aspects of electric-utility planning. Uncertainties about future load growth, about the continued performance of existing supply and demand resources, and about the costs, construction times, and operations of new resources greatly complicate utility resource acquisition. This paper discusses the factors that lead to uncertainty, reviews the methods that utilities use in planning and in acquiring resources, and suggests future research to help deal with these uncertainties. This review is based on assessments of the long-term resource plans prepared by 10 utilities and one Public Service Commission, telephone interviews with staff at these 11 organizations and with staff at three consulting firms, and reviews of many other related publications.     

A Trichloroethylene Risk Assessment Using a Monte Carlo Analysis of Parameter Uncertainty in Conjunction with Physiologically-Based Pharmacokinetic Modeling

A Monte Carlo simulation is incorporated into a risk assessment for trichloroethylene (TCE) using physiologically-based pharmacokinetic (PBPK) modeling coupled with the linearized multistage model to derive human carcinogenic risk extrapolations. The Monte Carlo technique incorporates physiological parameter variability to produce a statistically derived range of risk estimates which quantifies specific uncertainties associated with PBPK risk assessment approaches. Both inhalation and ingestion exposure routes are addressed. Simulated exposure scenarios were consistent with those used by the Environmental Protection Agency (EPA) in their TCE risk assessment. Mean values of physiological parameters were gathered from the literature for both mice (carcinogenic bioassay subjects) and for humans. Realistic physiological value distributions were assumed using existing data on variability. Mouse cancer bioassay data were correlated to total TCE metabolized and area-under-the-curve (blood concentration) trichloroacetic acid (TCA) as determined by a mouse PBPK model. These internal dose metrics were used in a linearized multistage model analysis to determine dose metric values corresponding to 10^-6 lifetime excess cancer risk. Using a human PBPK model, these metabolized doses were then extrapolated to equivalent human exposures (inhalation and ingestion). The Monte Carlo iterations with varying mouse and human physiological parameters produced a range of human exposure concentrations producing a 10^-6 risk.     

THE CREATION OF POLITICAL SOLIDARITY IN SOCIAL MOVEMENT ORGANIZATIONS*

This article examines the debate within resource mobilization theory concerning the motivation of participants in social movement organizations. Conclusions based on a case study of a Chicago community organization emphasize the importance of political solidarity in movement groups. An argument is made for a stage model of mobilization in which different types of incentives dominate motivation at different levels of involvement in the organization.     

An empirical assessment of the effect of professionalism on cynicism among prison guards

Prison guards have generally escaped social science inquiry. Although the prison guards’ officially prescribed role (custody and security) is straightforward, part of the problem is their isolation from the free society and the danger and uncertainty surrounding their work. One attitude that is potentially emergent in this problematic environment is cynicism. To minimize the effects of cynicism on prison guards, correctional agencies have devised and implemented a plan of professionalization, which is characterized by a concern for higher standards in all areas and improved benefits and working conditions. Our focus was evaluating the effect, if any, professionalism has on cynicism.

Analysis of data derived from 144 prison guards showed that the relationship between professionalism and cynicism is complex. Generally, only one professionalism dimension—sense of calling to the field—reduced a prison guard's cynicism. Effects of other professionalism dimensions on cynicism ranged from negligible to moderate.     

Influenza-Like Illness Among University Students: Symptom Severity and Duration Due to Influenza Virus Infection Compared to Other Etiologies

Abstract

Objective: University students with influenza-like illness (ILI) were assessed to determine whether symptom severity, duration, or missed days of school or work varied according to etiology. Participants: Sixty persons presenting to a university health clinic with ILI symptoms during 3 consecutive influenza seasons completed baseline survey and viral testing; 51 (85%) completed follow-up. Methods: Influenza viral culture and polymerase chain reaction and respiratory virus immunofluorescence assay testing were performed. Information collected at baseline and follow-up included symptom occurrence, severity, duration, and numbers of days of work and school missed. Results: Influenza virus was confirmed in 63% of participants. Influenza-positive individuals were no more likely to report any symptom or miss more days of school or work. Self-reported severity and durations of symptoms were similar between groups. Conclusions: Students with influenza-associated ILI were similar to those with noninfluenza ILI with respect to severity, duration, and numbers of days of school and work missed.     

Obsessive-Compulsive Spectrum Disorder Symptoms in College Students

Abstract

Objective: This study investigated the occurrence of obsessive-compulsive spectrum disorders (OCSDs) and associated symptomology in college students. Participants: Participants included 358 undergraduate students. Results: Results suggest that clinically significant levels of OCSD symptoms are relatively common. Additionally, OCSD symptoms co-occurred with each other and anxiety symptoms in general, yet not significantly with impulsivity symptoms. Conclusions: Given their prevalence in college students and potentially debilitating nature, it is important to increase awareness of OCSDs so that health professionals can better identify and treat symptoms of these disorders.     

What the 2008 Stock Market Crash Means for Retirement Security

The 2008 stock market crash raises concerns about retirement security, especially since the increased prevalence of 401(k) and similar retirement saving plans means that more Americans are now stakeholders in the equity market than in the past. Using a dynamic microsimulation model, this paper explores the ability of alternate future stock market scenarios to restore retirement assets. The authors find that those near retirement could fare the worst because they have no time to recoup their losses. Mid-career workers could fare better because they have more time to rebuild their wealth. They may even gain income if they buy stocks at low prices and get above-average rates of return. High-income groups will be the most affected because they are most likely to have financial assets and to be invested in the stock market.