The Impact of HIV Testing on Subjective Expectations and Risky Behavior in Malawi

We investigate the causal impact of learning HIV status on HIV/AIDS-related expectations and sexual behavior in the medium run. Our analyses document several unexpected results about the effect of learning one's own, or one's spouse's, HIV status. For example, receiving an HIV-negative test result implies higher subjective expectations about being HIV-positive after two years, and individuals tend to have larger prediction errors about their HIV status after learning their HIV status. If individuals in HIV-negative couples also learn the status of their spouse, these effects disappear. In terms of behavioral outcomes, our analyses document that HIV-positive individuals who learned their status reported having fewer partners and using condoms more often than those who did not learn their status. Among married respondents in HIV-negative couples, learning only one's own status increases risky behavior, while learning both statuses decreases risky behavior. In addition, individuals in sero-discordant couples who learned both statuses are more likely to report some condom use. Overall, our analyses suggest that ensuring that each spouse learns the HIV status of the other, either through couple's testing or through spousal communication, may be beneficial in high-prevalence environments.     

Maternal mental health in Australia and New Zealand: A review of longitudinal studies

AimThe aim of this paper is to describe the factors that impact on the mental health of Australian and New Zealand (NZ) women in the perinatal period (pregnancy and the year following birth), and to determine the impact of perinatal mental health on women's subsequent health by summarising findings from prospective longitudinal studies conducted in Australia and NZ.MethodsA systematic search was conducted using the databases, Scopus, Medline, PsychInfo and Health Source to identify prospective longitudinal studies focused on women's social and emotional health in the perinatal period. Forty-eight papers from eight longitudinal studies were included.ResultsThe proportion of women reporting depressive symptoms in the first year after birth was between 10 and 20% and this has remained stable over 25 years. The two strongest predictors for depression and anxiety were previous history of depression and poor partner relationship. Importantly, women's mood appears to be better in the first year after birth, when compared to pregnancy and five years later. Becoming a mother at a young age is by itself not a risk factor unless coupled with social disadvantage. Women report a high number of stressors in pregnancy and following birth and the rate of intimate partner violence reported is worryingly high.ConclusionMidwives have an important role in the identification, support and referral of women experiencing mental health problems. As many women do not seek help from mental health services, the potential for a known midwife to impact on women's mental health warrants further examination.     

Market Impact on IT Security Spending

Traditionally, IT security investment decisions are made in isolation. However, as firms that compete for customers in an industry are closely interlinked, a macro perspective is needed in analyzing these decisions. We utilize the notions of direct‐ and cross‐risk elasticity to describe the customer response to adverse IT security events in the firm and competitor, respectively, thus allowing us to analyze optimal security investment decisions. Examining both symmetric and asymmetric duopoly cases using a continuous‐time Markov chain (CTMC) model, we demonstrate that optimal IT security spending, expected firm profits and willingness of firms to cooperate on security improvements are highly dependent on the nature of customer response to adverse events. We also examine the investment problem when security attacks on different firms are correlated.     

Two-sided assembly line balancing: A genetic algorithm approach

A two-sided assembly line balancing problem is typically found in plants producing large-sized high-volume products, e.g. buses and trucks. The features specific to the assembly line are described in this paper, which are associated with those of: (i) two-sided assembly lines; (ii) positional constraints; and (iii) balancing at the operational time. There exists a large amount of literature in the area of line balancing, whereby it has mostly dealt with one-sided assembly lines. A new genetic algorithm is developed to solve the problem, and its applicability and extensibility are discussed. A genetic encoding and decoding scheme, and genetic operators suitable for the problem are devised. This is particularly emphasized using problem-specific information to enhance the performance of the genetic algorithm (GA). The proposed GA has a strength that it is flexible in solving various types of assembly line balancing problems. An experiment is carried out to verify the performance of the GA, and the results are reported.     

Interview Costs in the Secretary Problem

The effect of interview costs on the optimal selection strategy and on the chance of success in secretary problems with order k selection rules, both for a finite number of applicants and in the limiting case, is examined. Probabilistic reasoning is used and numerical examples given.     

Disentangling the Influence of Value Predispositions and Risk/Benefit Perceptions on Support for Nanotechnology Among the American Public

Using nanotechnology as a case study, this article explores (1) how people's perceptions of benefits and risks are related to their approval of nanotechnology, (2) which information‐processing factors contribute to public risk/benefit perceptions, and (3) whether individuals’ predispositions (i.e., deference to scientific authority and ideology) may moderate the relationship between cognitive processing and risk perceptions of the technology. Results indicate that benefit perceptions positively affect public support for nanotechnology; perceptions of risk tend to be more influenced by systematic processing than by heuristic cues, whereas both heuristic and systematic processing influence benefit perceptions. People who are more liberal‐minded tend to be more affected by systematic processing when thinking about the benefits of nanotechnology than those who are more conservative. Compared to less deferent individuals, those who are more deferent to scientific authority tend to be less influenced by systematic processing when making judgments about the benefits and risks of nanotechnology. Implications are discussed.     

Health Claims Regulations: Voices from Korean Consumers and Experts

Processed foods such as milk and cereal are allowed to use health claims limitedly. The purpose of this study was to document consumers and experts about their opinions on the permission of health claims on processed foods. We conducted a national survey of 1,000 adults and interviewed 16 experts. We found that consumers were generally favorable toward the permission of health claims on processed foods. Experts emphasized strict, scientific review by a government agency, effective consumer education, and cautious claims such as warnings and daily intake claims.     

Differential Survival in Europe and the United States: Estimates Based on Subjective Probabilities of Survival

Cross-country comparisons of differential survival by socioeconomic status (SES) are useful in many domains. Yet, to date, such studies have been rare. Reliably estimating differential survival in a single country has been challenging because it requires rich panel data with a large sample size. Cross-country estimates have proven even more difficult because the measures of SES need to be comparable internationally. We present an alternative method for acquiring information on differential survival by SES. Rather than using observations of actual survival, we relate individuals’ subjective probabilities of survival to SES variables in cross section. To show that subjective survival probabilities are informative proxies for actual survival when estimating differential survival, we compare estimates of differential survival based on actual survival with estimates based on subjective probabilities of survival for the same sample. The results are remarkably similar. We then use this approach to compare differential survival by SES for 10 European countries and the United States. Wealthier people have higher survival probabilities than those who are less wealthy, but the strength of the association differs across countries. Nations with a smaller gradient appear to be Belgium, France, and Italy, while the United States, England, and Sweden appear to have a larger gradient.     

Munchausen Syndrome by Proxy: Another Form of Child Abuse

Munchausen syndrome by proxy (MSbP) was first described by Dr Roy Meadow in 1977 as a form of child abuse in which illnesses are fabricated in a child by a parent, usually the mother. The parent causes the illness in the child or exaggerates symptoms in the child, resulting in unnecessary medical and psychological treatments and hospitalizations (Meadow, 1985). The presentation of children in a variety of ways to different medical institutions often defies detection (Williams, 1986). Extra vigilance and investigative efforts are required to unravel the complexity of the action in the pathogenic family. In recent years, MSbP has been reported with increasing frequency and it is now recognized as more common in the service delivery system than has been previously documented. Medical, psychological and social information are separate pieces of a puzzle which will remain separate without a coordinating body to integrate and complete the overall picture. This paper explores a particular case in the State of New South Wales, where members of the legal, medical, social work and psychology professions collaborated to establish that the child was in need of care and should be removed from the high-risk environment in the family home. This is the first Munchausen case in New South Wales that has proceeded to the Supreme Court. Highlighted are the difficulties involved in identifying the syndrome. It is proposed that a coordinating body is fundamental for collating retrospective medical records and to provide a pivotal point for the various professionals involved to meet, exchange and share discrete information. It is further suggested that the Child Protection Services within the State be made responsible for this function and a standardized and systematic procedure be adopted when encountering cases of possible MSbP.     

Beyond Homonegativity: Understanding Hong Kong People’s Attitudes About Social Acceptance of Gay/Lesbian People,Sexual Orientation Discrimination Protection,and Same-Sex Marriage

This study examined attitudes about social acceptance, discrimination protection, and marriage equality for gay/lesbian people with a representative sample of 1,008 Hong Kong Chinese adults via a telephone survey. Despite majority endorsement of homosexuality (52.29% positive vs. 34.12% negative) and discrimination protection (50.72% favorable vs. 14.64% opposed), attitudes toward same-sex marriage diverged (32.79% favorable vs. 39.41% opposed). There was a sharp distinction in accepting gay/lesbian people as co-workers (83.57%) and friends (76.92%) versus relatives (40.19%). Having more homosexual/bisexual friends or co-workers contributed to greater endorsement of social acceptance and discrimination protection but not same-sex marriage. Age, religion, political orientation, and homonegativity consistently predicted attitudes toward social acceptance, discrimination protection, and same-sex marriage, whereas gender-role beliefs, conformity to norms, and cultural orientations had varying impacts. This article informs theory and advocacy by disentangling homonegativity from attitudes about gay/lesbian issues and highlighting the centrality of family-kinship and relative-outsider delineation in Chinese societies.