Hard thresholding regression

In this paper, we propose the hard thresholding regression (HTR) for estimating high‐dimensional sparse linear regression models. HTR uses a two‐stage convex algorithm to approximate the ?₀‐penalized regression: The first stage calculates a coarse initial estimator, and the second stage identifies the oracle estimator by borrowing information from the first one. Theoretically, the HTR estimator achieves the strong oracle property over a wide range of regularization parameters. Numerical examples and a real data example lend further support to our proposed methodology.     

Walking a tightrope: reflections on police gatekeeping roles in suicide research in Ghana

Engaging non-conventional gatekeepers such as the police presents both promises and perils. Although studies have relied on police data for researching suicide and other sensitive topics in Africa, there is a paucity of literature that explores or reflects on police gatekeeping and its research implications. This paper presents authors’ reflections on police gatekeeping in a qualitative suicide study in Accra, Ghana. The main observation is that the process was double-edged. On the one hand, it led to field delays and costs, (mis)apprehensions and positionality problems, and trust building challenges. On the other hand, it vouched for research(er) credibility, provided therapeutic openings, and facilitated the viability of research with the suicide bereaved. Sensitivity to research context, sensitising the police, and reinforcing ‘therapeutic-research discourse’ with participants, are recommended means for aligning participants’ goals to research goals and for achieving therapeutic disclosures.     

Techno-Wizardry and movie magic: the trace of labour (or lack thereof) in 3D digital animation

ABSTRACT

This paper will argue that 3D digital animation, unlike its 2D and stop-motion counterparts, currently lacks recognisable self-reflexive aesthetic devices through which the trace of animators’ labour can be made visible. It will open with a brief history of how animation has previously shown its workings; from the pencil-wielding hand of Émile Cohl to the opening seconds of South Park, plus the intentional and unintentional smears and multiples visible on animation cells. These devices will then be discussed in relation to Marx’s analysis of the commodity in Capital Vol. 1, and how the process of fetishisation is momentarily disrupted by imperfections in the object which have been caused by production errors. These faults reconnect the object to its producer through the trace of (imperfect) labour which remains visible on the surface. In animation, similar (albeit consciously made) ‘errors’ connect the perceptive viewer directly to the work of 2D or stop-motion animators. This paper will argue the need for an equivalent to emerge in 3D digital animation, as well as highlighting some contemporary animators testing and subverting the limits of 3D and sketching some possible ways these might encourage further formal innovations.     

Documenting Pornography Use in America: A Comparative Analysis of Methodological Approaches

Estimates of pornography use in the United States range widely. We explore the reasons for the variation in such estimates among U.S. adults using data from four different recent nationally representative samples—each of which asked a different type of question about pornography use. We attribute the notable variation in estimates to differences in question wording and answer options, and assert that a survey question asking respondents about their most recent use of pornography minimizes recall bias and is better poised to assess the overall prevalence of pornography in a population than is the more common approach of asking respondents about their historical general-use pattern. When we privileged the most-recent-use approach, survey data from 2014 reveal that 46% of men and 16% of women between the ages of 18 and 39 intentionally viewed pornography in a given week. These numbers are notably higher than most previous population estimates employing different types of questions. The results have ramifications for methods of surveying sensitive self-reported behaviors and for contextualizing scholars’ claims as well as popular conversations about the reach and implications of pornography use in the United States.     

COMBAT EXPOSURE,CIGARETTE CONSUMPTION,AND SUBSTANCE USE

This study estimates the relationship between combat exposure and several risky health behaviors: cigarette consumption, binge drinking, and drug use. We find that the U.S. active duty military personnel deployed to combat zones with enemy firefight are more likely to subsequently smoke cigarettes, consume alcohol, and use illicit drugs than their counterparts deployed to noncombat operations. Our results suggest that the mental health effects of combat can explain up to two‐thirds of the estimated association between combat exposure and risky health behaviors. (JEL H56, I12)     

Latent Class Analysis of Gambling Activities in a Sample of Young Swiss Men: Association with Gambling Problems,Substance Use Outcomes,Personality Traits and Coping Strategies

The study aimed to identify different patterns of gambling activities (PGAs) and to investigate how PGAs differed in gambling problems, substance use outcomes, personality traits and coping strategies. A representative sample of 4989 young Swiss males completed a questionnaire assessing seven distinct gambling activities, gambling problems, substance use outcomes, personality traits and coping strategies. PGAs were identified using latent class analysis (LCA). Differences between PGAs in gambling and substance use outcomes, personality traits and coping strategies were tested. LCA identified six different PGAs. With regard to gambling and substance use outcomes, the three most problematic PGAs were extensive gamblers, followed by private gamblers, and electronic lottery and casino gamblers, respectively. By contrast, the three least detrimental PGAs were rare or non-gamblers, lottery only gamblers and casino gamblers. With regard to personality traits, compared with rare or non-gamblers, private and casino gamblers reported higher levels of sensation seeking. Electronic lottery and casino gamblers, private gamblers and extensive gamblers had higher levels of aggression-hostility. Extensive and casino gamblers reported higher levels of sociability, whereas casino gamblers reported lower levels of anxiety–neuroticism. Extensive gamblers used more maladaptive and less adaptive coping strategies than other groups. Results suggest that gambling is not a homogeneous activity since different types of gamblers exist according to the PGA they are engaged in. Extensive gamblers, electronic and casino gamblers and private gamblers may have the most problematic PGAs. Personality traits and coping skills may predispose individuals to PGAs associated with more or less negative outcomes.     

Religion and the Representative Anecdote: Replacement and Revenge in AMC’s The Walking Dead

The current study examines how the horror-based AMC television series The Walking Dead portrays religion in terms of a reframing of the role, if any, of faith in a higher power, and the portrayal of the faithful. The religious-themed discourse of this highly successful story about survivors of a zombie apocalypse as presented through dialogic and visual imagery serves as the text analyzed here; specifically, related episodes set in churches at two separate points in the series that combine to offer a metaphor of “structure” used to disassemble and reconstruct the role of religion. These episodes interlace religious themes to develop an overarching message that forms a representative anecdote of replacement in which the notion of “faith” becomes redefined.