On regression-based tests for persistence in logarithmic volatility models

Building on the work of Pantula (1986), this paper discusses how the hypothesis of conditional variance nonstationarity in the logarithmic family of generalized autoregressive conditional heteroskedasticity (GARCH) and stochastic volatility processes may be tested using regression-based tests. The latter are easy to implement, have well-defined large-sample distributions, and are less sensitive to structural changes than tests based on the quasimaximum likelihood estimator.     

Sexist ideology and the evaluation criteria used to assess women's integration into the army

This article is a reaction to the 1978 Evaluation of Women in the Army report issued by the U.S. Army. It looks at the criteria used in women's evaluation in terms of the sexist ideology prevalent in the military system. Those issues which are identified by the Army as problematic and which affect policies regarding women's full integration into the Army are discussed at length.An earlier version of this paper was presented at the annual meeting of the Southern Sociological Society in April, 1983. I am indebted to Nijole V. Benokraitis for her comments at that time. I would also like to thank John Sibley Butler, Susan Marshall and Marie Crane for their helpful comments. Any opinions, conclusions, and recommendations, whether expressed or implied, are those of the author.     

Symbolic Products: Prestige, Pride and Identity Goods

The paper distinguishes between two kinds of products, `symbolic' and `substantive'. While substantive products confer welfare utility in the sense of pecuniary benefits, symbolic products accord self-regarding utility. Symbolic products enter the utility function in a way which differs from substantive ones. The paper distinguishes among three kinds of symbolic products and proposes that each has a distorted form. If symbolic products result from forward-looking evaluation, they act as `prestige goods' which please admiration or, when distorted, as `vanity goods' which satiate pretentiousness. When symbolic products originate from forward-looking action, they act as `pride goods' which satisfy respect or, when distorted, as `deference goods' which indulge pomposity. When symbolic products arise from backward-looking evaluation, they act as `identity goods' which enhance dignity or, when distorted, as `reification goods' which gratify reverence.     

Asthma and allergy as risk factors for suicidal behavior among young adults

An association between allergic disease, depression and suicidality has been reported. Objective: To explore the relationships between suicidality and asthma, allergy, internet addiction, stress, sleep quality, pain/discomfort, and depression, among emerging adults. Participants: 929 college students completed an online survey between October 2015 and April 2017. Methods: A cross-sectional study using multivariate analysis techniques was implemented. Results: Using structural equation modeling, we found that allergies and stress were directly related to pain/discomfort; pain/discomfort was associated to poor sleep, depression, and suicidality. Sleep quality was also affected by stress; while sleep, stress, pain/discomfort, and internet addiction were directly related to depression (all p < .05). Ultimately, four factors impacted suicidality: stress, pain/discomfort, depression, and, indirectly, sleep quality (all p < .05). Although allergy had some effects, these did not reach statistical significance (p < .09). Conclusion: Findings suggest that allergy might impact suicidality indirectly through increased pain/discomfort, poor sleep, and depression.     

Pharmaceutical Pricing in Europe: Weighing up the Options

Rising healthcare costs, particularly pharmaceutical expenditures, have led to the implementation of several pharmaceutical pricing regulations and policies throughout the world. This paper undertakes a critical review of current policies, along with a discussion of alternatives for both on‐patent and off‐patent drug pricing mechanisms. Traditional direct and indirect price controls have failed to balance the objectives of efficiency and equity. Direct price controls do not restrain growth of costs and may not address the need for innovation. Indirect price controls fail to contain costs and do little to create a competitive off‐patent pharmaceutical market. For the on‐patent drug markets, we evaluate the use of profit controls, government purchase or auction of patents and Ramsey pricing. Each of these has its own merit, yet the integration of the often separate price and reimbursement decision‐making processes would seem to hold the most promise for governments and purchasers to obtain value for money. This approach could send signals to the industry to help direct research towards clinically relevant areas.     

Student Self‐Reported Positive Purpose Over Two Years in Urban Middle Schools

We used Developmental Systems Theory as a framework for understanding the role of contextual factors in the development of purpose in urban adolescents. The sample included primarily low‐socioeconomic students of color attending urban middle schools (n = 2,629; 10–16 years of age). Longitudinal data were collected at four time points across two years. We used hierarchical linear modeling to model change in purpose. On average, purpose declined over time. We also identified several predictors of intercept and slope. For example, Black youth had a higher average purpose intercept, as well as a steeper average decline than other racial/ethnic groups. Females demonstrated a higher average purpose intercept than males, but this effect disappeared when academic achievement was added to the model.     

Asymptotic Normality of a Kernel Conditional Quantile Estimator Under Strong Mixing Hypothesis and Left-Truncation

We consider the estimation of the conditional quantile when the interest variable is subject to left truncation. Under regularity conditions, it is shown that the kernel estimate of the conditional quantile is asymptotically normally distributed, when the data exhibit some kind of dependence. We use asymptotic normality to construct confidence bands for predictors based on the kernel estimate of the conditional median.