Efficiency, equality and labelling: an experimental investigation of focal points in explicit bargaining

Efficiency, equality and labelling: an experimental investigation of focal points in explicit bargainin

Sociodemographic Trends in National Ambulatory Care Visits for Hepatitis C Virus Infection

Poor and non-white patients are disproportionately infected with the hepatitis C virus (HCV). The objective of this research is to determine sociodemographic patterns of HCV-related ambulatory care visits over time. Data from the National Ambulatory Medical Care Survey (NAMCS) and the National Hospital Ambulatory Medical Care Survey-Outpatient (NHAMCS-OPD) for the years 1997–2005 were analyzed in 3-year intervals. Demographic and other variables were compared for each period, and multivariable logistic regression was performed to examine whether the likelihood of a visit being HCV-related (versus non-HCV) was independently associated with (1) race and/or (2) Medicaid status over time. The total number of HCV-related ambulatory visits more than doubled from 3,583,585 during the years 1997–1999 to 8,027,166 during 2003–2005. During this time, the proportion of non-whites and Medicaid recipients presenting for HCV-related visits approximately doubled (non-whites: 16% vs. 33%, P = 0.04; Medicaid recipients: 10% vs. 25%, P = 0.07). In 2003–2005, HCV-related visits were more than twice as likely to occur among non-white patients vs. white patients (OR = 2.49; 95% CI: 1.60–3.86) and patients on Medicaid vs. non-Medicaid (3.49; 1.79–6.80). Our results show that HCV-associated ambulatory care visits are increasing, with a greater proportion of visits occurring among non-white patients and Medicaid recipients

Punishment in Prison: Constituting the Normal and the Atypical in Solitary and Other Forms of Confinement

What aspects of human liberty does incarceration impinge? A remarkable group of Black and white prisoners, most of whom had little formal education and no resources, raised that question in the 1960s and 1970s. Incarcerated individuals asked judges for relief from corporal punishment; radical food deprivations; strip cells; solitary confinement in dark cells; prohibitions on bringing these claims to courts, on religious observance, and on receiving reading materials; and from transfers to long- term isolation and to higher security levels. Judges concluded that some facets of prison that were once ordinary features of incarceration, such as racial segregation, rampant violence, and filth, violated the Constitution. Today, even as implementation is erratic and at times abysmal, correctional departments no longer claim they have unfettered authority to do what they want inside prisons walls. And, even as the courts have continued to tolerate the punishment of solitary confinement in the last decade, a few lower courts have held unconstitutional the profound sensory deprivations such isolation has entailed. Prisoners have also sought procedural protections to constrain arbitrary decision-making about placements in solitary confinement and transfers to adverse settings. In response, the Supreme Court has required that, to state a Fourteenth Amendment claim that their liberty had been infringed, prisoners have to demonstrate that a specific practice imposed an “atypical” and “significant hardship.” What is typical in prisons? What are the sources of knowledge and the baselines used by Justices to decide? How did isolation come to be seen as an ordinary incident of prison life? We answer these questions through analyzing debates in both the U.S. Supreme Court and lower courts about what deprivations in prison are “normal.” After excavating the conflicts within the Court about the kinds of liberty interests prisoners retained, we mined hundreds of lower court opinions to learn how judges determine when constrictions on human movement meet the test of atypicality and hardship. By documenting the high tolerance many federal judges have for periods of isolation lasting months, years, and decades, we demonstrate the central role judges play in constructing the “normal” of prisons

Alpha3/alpha2 power ratios relate to performance on a virtual reality shopping task in ageing adults

Background: Aspects of cognitive function decline with age. This phenomenon is referred to as age-related cognitive decline (ARCD). Improving the understanding of these changes that occur as part of the ageing process can serve to enhance the detection of the more incapacitating neurodegenerative disorders such as Alzheimer’s disease (AD). In this study, we employ novel methods to assess ARCD by exploring the utility of the alpha3/alpha2 electroencephalogram (EEG) power ratio – a marker of AD, and a novel virtual reality (VR) functional cognition task – VStore, in discriminating between young and ageing healthy adults. Materials and methods: Twenty young individuals aged 20–30, and 20 older adults aged 60–70 took part in the study. Participants underwent resting-state EEG and completed VStore and the Cogstate Computerised Cognitive Battery. The difference in alpha3/alpha2 power ratios between the age groups was tested using t-test. In addition, the discriminatory accuracy of VStore and Cogstate were compared using logistic regression and overlying receiver operating characteristic (ROC) curves. Youden’s J statistic was used to establish the optimal threshold for sensitivity and specificity and model performance was evaluated with the DeLong’s test. Finally, alpha3/alpha2 power ratios were correlated with VStote and Cogstate performance. Results: The difference in alpha3/alpha2 power ratios between age cohorts was not statistically significant. On the other hand, VStore discriminated between age groups with high sensitivity (94%) and specificity (95%) The Cogstate Pre-clinical Alzheimer’s Battery achieved a sensitivity of 89% and specificity of 60%, and Cogstate Composite Score achieved a sensitivity of 83% and specificity of 85%. The differences between the discriminatory accuracy of VStore and Cogstate models were statistically significant. Finally, high alpha3/alpha2 power ratios correlated strongly with VStore (r = 0.73), the Cogstate Pre-clinical Alzheimer’s Battery (r = -0.67), and Cogstate Composite Score (r = -0.76). Conclusion: While we did not find evidence that the alpha3/alpha2 power ratio is elevated in healthy ageing individuals compared to young individuals, we demonstrated that VStore can classify age cohorts with high accuracy, supporting its utility in the assessment of ARCD. In addition, we found preliminary evidence that elevated alpha3/alpha2 power ratio may be linked to lower cognitive performance