Sexual Orientation,Relationships with Parents,Stress, and Depressive Symptoms among Adults

Disparities in depressive symptoms as a function of sexual orientation have been well documented, but less is known about their origins. This study examines whether, even in adulthood, less favorable parental relationships are associated with disparities in depressive symptoms as a function of sexual orientation. Cross-sectional data were drawn from Wave IV of the National Longitudinal Study of Adolescent to Adult Health. Gay, lesbian, and bisexual (GLB) participants reported lower quality parental relationships, greater stress, and more depressive symptoms than did heterosexual participants. Lower quality parental relationships were associated with higher stress. Higher stress and lower quality parental relationships were associated with more depressive symptoms. GLB individuals reported lower father relationship quality and higher stress, which partially mediated the association of sexuality and depressive symptoms. Lesbian and bisexual women reported lower mother relationship quality and higher stress, which fully mediated the association of sexuality and depressive symptoms. While no differences in mother relationship quality existed for men, mother relationship quality was more strongly associated with depressive symptoms for gay and bisexual men than for heterosexual men. Even in adulthood, greater stress and depressive symptoms among GLB individuals were at least partially accounted for by less favorable parental relationships.     

Health Risks of PCB Spills from Electrical Equipment

The Southern California Edison Company (SCE) has instituted a series of control strategies designed to minimize human exposure to polychlorinated biphenyls (PCBs) in electrical equipment used on its system. This paper describes a method of analyzing PCB risks using conservative estimates of human intake of PCBs originating from accidental spills from electrical equipment. The PCB releases from the Edison system were determined. The fate of these releases in soil, air, and water was analyzed to determine how much material reaches human receptors. The air and water pathways were determined to be the most likely candidates for the exposure and risk considerations. PCB intake via ingestion of soil at the spill site was neglected as an exposure pathway. Equipment spills without controls resulted in at the most 2 ng/day human intake of PCBs via the water exposure pathway. This was determined to be negligible in comparison with intake rates used in conjunction with the setting of food tolerance levels based on fish being the main dietary pathway of human exposure. The inhalation exposure of the hundred or so persons in the immediate vicinity of a spill was determined to equal the PCB intakes of the fish-eating subpopulation analyzed by the Food and Drug Administration for 2 ppm tolerance standard in the case of no controls or cleanup. Current cleanup procedures assure that even the persons in the immediate area are well below the intake of the subjects in the fish contamination analysis. All exposures were well below a "virtual safe dose" level estimated in the fish tolerance study.     

The market for foster care: an empirical study of the impact of foster care subsidies

When parents are suspected of child abuse or neglect, their children may be placed with foster families. We estimate the relationship between the monthly subsidies paid to foster families and the quantity of foster care services provided. The empirical model uses variation in subsidies and foster care populations within 37 states and the years 1987–1995. One innovation in our approach is that we exploit the idea that states do not appear to set market clearing rates, as evidenced by a foster home shortage during this time period. In this case of excess demand, variation in the monthly subsidy traces out the supply curve. Our results show that states with high demand may be able to use economic incentives to recruit foster families.

A comparison of three weight elicitation methods: good, better, and best

This paper compares the properties and performance of three weight elicitation methods. It is in effect a “second round contest” in which the Bottomley et al. (2000) champion, direct rating (DR), locks horns with two new challengers. People using DR rate each attribute in turn on a scale of 0–100, whilst people using Max100 first assign to the most important attribute(s) a rating of 100, and then rate the other attributes relative to it/them. People using Min10 first assign the least important attribute(s) a rating of 10, and then rate the other attributes relative to it/them.The weights produced by Max100 were somewhat more test–retest reliable than DR. Both methods were considerably more reliable than Min10. Using people's test–retest data as attribute weights on simulated alternative values in a multi-attribute choice scenario, the same alternative would be chosen on 91% of occasions using Max100, 87% of occasions using DR, but only 75% of occasions using Min10. Moreover, the three methods are shown to have very distinct “signatures”, that is profiles relating weights to rank position. Finally, people actually preferred using Max100 and DR rather than Min10, an important pragmatic consideration.     

Socioeconomic differences in early childhood time preferences

This article examines the extent to which early childhood socioeconomic differences emerge in hyperactivity, impulsivity and persistence, all of which are psychometric analogues to how economists conceptualise time discounting. We control for a wide range of factors including parental investment and proxies for maternal time preferences. Our results show substantial social class variations across measures at age 3. We find weak evidence that these measures are predicted by differential maternal behaviours (e.g. savings behaviour, smoking) but relatively stronger evidence that these traits are transmitted through the parents’ own non-cognitive skills (self-esteem, attachment) and parental time investments (time spent reading to the child and teaching the child to write, sing).     

Multiple imputation for missing data in a longitudinal cohort study: a tutorial based on a detailed case study involving imputation of missing outcome data

Multiple imputation (MI), a two-stage process whereby missing data are imputed multiple times and the resulting estimates of the parameter(s) of interest are combined across the completed datasets, is becoming increasingly popular for handling missing data. However, MI can result in biased inference if not carried out appropriately or if the underlying assumptions are not justifiable. Despite this, there remains a scarcity of guidelines for carrying out MI. In this paper we provide a tutorial on the main issues involved in employing MI, as well as highlighting some common pitfalls and misconceptions, and areas requiring further development. When contemplating using MI we must first consider whether it is likely to offer gains (reduced bias or increased precision) over alternative methods of analysis. Once it has been decided to use MI, there are a number of decisions that must be made during the imputation process; we discuss the extent to which these decisions can be guided by the current literature. Finally we highlight the importance of checking the fit of the imputation model. This process is illustrated using a case study in which we impute missing outcome data in a five-wave longitudinal study that compared extremely preterm individuals with term-born controls.     

Perceptions of Same-Sex Relationships and Marriage as Gender Role Violations: An Examination of Gendered Expectations (Sexism)

The current study sought to add to the literature that has demonstrated a link between sexism and sexual prejudice. The study evaluated whether a community sample with an age range of 19–64 (n = 122), including 32% sexual minority participants, believe that dating, sex, and marriage with same-sex partners are perceived to be gender role violations. Results varied by participant sexual/gender identity (LGBTQ or heterosexual) and political ideology. Liberal LGBTQ persons do not see same-sex relationships as gender role violations; LGBTQ non-liberals and heterosexual liberals rated same-sex relationships as mild violations; and non-liberal heterosexuals perceive same-sex relationships as “moderate” violations. Our results suggest both positive movement in attitudes toward same-sex relationships, including same-sex marriage, and broader recognition that gender identity, gender role expression, and sexual orientation are separate and distinct components of one’s overall sexual identity.