Empirical Bayes estimation of parameters in Markov transition probability matrix with computational methods

Empirical Bayes estimator for the transition probability matrix is worked out in the cases where we have belief regarding the parameters, For example, where the states seem to be equal or not. In both cases, priors are in accordance with our beliefs. Using EM algorithm, computational methods for different hyperparameters of the empirical Bayes are described. Also, robustness of empirical Bayes procedure is investigated.     

“No strings attached”: A qualitative exploration of gay and bisexual men’s motivations for and attitudes toward engaging in casual sex while on vacation

Prior quantitative research with gay and bisexual men (GBM) has documented high rates of sexual risk behavior during recreational travel. Although some associations are known (e.g., substance use at the tourist destination is associated with sexual risk), less is known about GBM’s motivations for travel and the cognitive and attitudinal factors that influence their sexual behavior while vacationing. In the present study, we conducted qualitative interviews with 46 GBM recruited from three popular gay tourist destinations. Using the Health Belief Model (HBM) as a guiding theoretical framework, the findings of the study revealed that the gay-friendly, tropical, relaxing environments resulted in men letting their guard down and engaging in more risk than when they are at home. Various barriers such as peer pressure and substance use affect GBM’s ability to engage in healthier behaviors while traveling, with condom negotiation and HIV status disclosure as additional issues that impact the sex practices of this population. Results highlight the applicability of HBM constructs to provide insight for intervention development for this population.     

Stigma,AIDS, and HIV Prevention in Africa: Reports from Community Organizations Providing Prevention Services

ABSTRACT

The AIDS epidemic in Africa remains a serious health crisis. Nongovernmental organizations (NGOs) in Africa play a critical role in the delivery of HIV prevention services. An important barrier to their HIV prevention efforts is stigma directed at persons living with HIV/AIDS. In order to understand how stigma affects HIV prevention programming, we conducted in-depth qualitative interviews with NGO directors in 29 African countries. Qualitative analytic approaches were used to identify key themes. Substantial discrimination and stigmatization of HIV-positive persons was reported. HIV-positive women were particularly likely to suffer negative social and economic consequences. The stigma associated with HIV interfered with disclosure of HIV status, risk-reduction behaviors, and HIV testing, creating significant barriers to HIV prevention efforts.

Interventions to reduce AIDS-related stigma in Africa are urgently needed. Reducing the burden of stigma is critical to fighting the epidemic in Africa and could play an important role in global HIV reduction.     

Small domain estimation by empirical bayes and kalman filtering procedures - a case study

An application of empirical Bayes and Kalman filtering tecniques is reported, using live data from Indian Statistical Institute (ISI), Calcutta . to illustrate how initial small domain estimators may be vastly improved upon. A stratified two stage sampling procedure is adopted, allowing selection of first stage units with unequal probabilities but of second stage units with equal probabilities. Standard design-based estimators for domain totals are initialized based on domain specific survey data alone. Strength is then borrowed across domains and from past surveys. The resulting gains in efficacy are numlerically demonstrated, through replicated sampling from official records.     

Confiding About Problems in Marriage and Long‐Term Committed Relationships: A National Study

This study examined confiding patterns in a national sample of 1000 U.S. adults aged 25–70 to inform the development of an educational program for confidants, called Marital First Responders. Results showed that 73% of U.S. adults have been a confidant to someone with a problem in a marriage or long‐term committed relationship. The most common confiding relationship was between friends, followed by siblings. Confidants reported a wide range of problems brought to them, ranging from everyday complaints to serious issues such as infidelity and divorce. Confiders identified the most and least helpful responses. Findings suggest that naturally occurring confiding relationships have considerable potential to be the first level of help for troubled couple relationships.     

Designating Dependency: The “Socially Inadequate” in the United States, 1910–1940

This article examines the use of “socially inadequate” as a label for the dependent poor in the United States, 1910–40. It analyses the dense meanings that were given to this term and the political significance that the label “socially inadequate” gained in relation to sterilization and immigration policy. The article explores the role played by eugenicist, Harry Laughlin, as a label maker for the term and a moral entrepreneur in relation to the problem of dependency. It argues that “socially inadequate” was a stigmatising designation for members of perceived deficient groups, whom were seen as falling below the normal or acceptable standards of society and were, as such, viewed as undeserving of the status of citizen. Finally, it contends that the negative moral and emotional judgments encoded into definitions of the “socially inadequate” can be situated within the history of the derogation of dependency, understood as economic reliance on the state or charity, in the United States.     

Explaining spousal differences in reproductive preferences: A gender inequality approach

Using data from the 1988 Ghana Demographic and Health Survey we show that, contrary to some earlier findings, substantial differences in fertility goals exist between spouses in sub-Saharan Africa. Further, we indicate that gender inequality is associated with these differences in fertility goals. Women in dyads that give nonnumeric responses to questions on preferred family size are very likely to have low status, which may lead them to have high fertility. The need for more research at the micro level is stressed, given the social, economic, and environmental costs of neglecting to do so.     

The Use of Internet Chat Rooms to Meet Sexual Partners: A Comparison of Non-Heterosexually Identified Men with Heterosexually Identified Men and Women

ABSTRACT. Objectives: Prior work suggests that many individuals use the Internet to meet romantic or sexual partners. Our intent was to explore perceptions and experiences with meeting people online. Methods: In 2008, the authors conducted U.S.-based online interviews with 65 predominantly White, self-identified heterosexual men and women and gay/bisexual men (Mean age = 30.8 years). Results: Reasons for meeting people online, desired partner characteristics, and the process of connecting for sex paralleled those observed in face-to-face contexts. People used Internet chat rooms to identify more partners and specific partner characteristics. “Background checks” of online partners, though often believed to be inaccurate, increased familiarity and trust leading to reduced condom use. Participants said online condom use negotiation was easier but usually occurred in face-to-face contexts. Conclusions: The fundamental processes of meeting partners online are similar in many ways to meeting partners face-to-face; however, the Internet facilitates rapid access to relatively large numbers of potential partners.