Genetic influence on age at first birth of female twins born in the UK, 1919–68

Using a sample of monozygotic (945, 42?per cent) and dizygotic (1,329, 58?per cent) twin pairs born 1919–68 in the UK, we applied innovative tobit models to investigate genetic and environmental influences on age at first birth (AFB). We found that a substantial part (40?per cent) of the variation in AFB is caused by latent family characteristics. Genetic dispositions (26?per cent) play a more important role than the shared environment of siblings (14?per cent), with the non-shared environment/measurement error having the strongest influence (60?per cent). Like previous studies, this study reveals marked changes in estimates over time, and supports the idea that environmental constraints (war or economic crisis) suppress and normative freedom (sexual revolution) promotes the activation of genetic predispositions that affect fertility. We show that the exclusion of censored information (i.e., on the childless) by previous studies biased their results.

Supplementary material for this article is available at: http://dx.doi.org/10.1080/00324728.2015.1056823     

AIDS KNOWLEDGE AND ATTITUDES AMONG CANBERRA SECONDARY SCHOOL STUDENTS

This paper reports findings from a study of 1,014 Canberra secondary school students in 15 government and private schools. Open-ended responses concerning students' understanding of AIDS, and their views regarding prevention, are presented and discussed. Data on source of AIDS information are also investigated. In general, students understand AIDS as sex-linked, that it involves transmission through the blood, and that there is no cure for it. They espouse more research and education as the main preventive measures, although males also propose homophobic solutions. Teachers and television are the primary sources of AIDS information. Differences by sex of respondent and school type are reported and implications for school-based AIDS education policies are suggested.     

Cost‐Benefit Analysis of Passive Fire Protections in Road LPG Transportation

The cost‐benefit evaluation of passive fire protection adoption in the road transport of liquefied petroleum gas (LPG) was investigated. In a previous study, mathematical simulations of real scale fire scenarios proved the effectiveness of passive fire protections in preventing the “fired” boiling liquid expanding vapor explosion (BLEVE), thus providing a significant risk reduction. In the present study the economical aspects of the adoption of fire protections are analyzed and an approach to cost‐benefit analysis (CBA) is proposed. The CBA model is based on the comparison of the risk reduction due to fire protections (expressed in monetary terms by the value of a statistical life) and the cost of the application of fire protections to a fleet of tankers. Different types of fire protections were considered, as well as the possibility to apply protections to the entire fleet or only to a part of it. The application of the proposed model to a real‐life case study is presented and discussed. Results demonstrate that the adoption of passive fire protections on road tankers, though not compulsory in Europe, can be economically feasible, thus representing a concrete measure to achieve control of the “major hazard accidents” cited by the European legislation.     

The statistical properties of the networks of emigrants: the Ecuadorian case

This article shows that the threshold model appropriately analysed can explain the emigration process as a consequence of the network features, where the willingness to emigrate depends on the personal and household conditions borne by the emigrant. In such a case, the emigration process can be defined in terms of a Pólya schema, and the emigration rate converges almost surely to a random variable with a beta distribution, which fully characterizes the network (assimilation, integration, separation or marginalization). The model is applied to Ecuador, which has experienced an unprecedented wave of emigration since 1998. We show that, despite the massive exodus, the process does not constitute a diaspora, because Ecuadorians do not interact appropriately with natives.     

The emotional abuse of elite child athletes by their coaches

This study investigates the prevalence of emotional abuse of elite child athletes by their coaches in the UK. Previous research has focused primarily on the parent–child relationship, with little attention given to date on the sports environment. Participants were 12 former elite child athletes who competed as internationals in their respective age groups. All participants had been identi?ed as elite athletes between the ages of 8 and 16 years (M = 13.1 yr, SD = 2.4 yr) and had competitive careers of between 6 and 10 years. Participants were from the sports of diving (N = 2), football (N = 3), gymnastics (N = 4), hockey, netball and track and ?eld athletics (N = 1 each). The study was a retrospective analysis of their experiences as elite child athletes. (Age at interview: M = 22.9 yr, SD = 0.9 yr. male = 4, female = 8.) Thus, participants were re?ecting on experiences from about 10 years previously, so their responses represented the residual impact of their experiences that had survived over this period. Data were collected using semi‐structured interviews and response‐coding techniques. Abusive behaviours were categorized under eight headings: belittling, humiliating, shouting, scapegoating, rejecting, isolating, threatening and ignoring. Results showed that all (N = 12) of the participants reported experiencing belittling and shouting by their coach, nine athletes reported frequent threatening behaviour, nine reported frequent humiliation, seven reported scapegoating, six reported rejection or being ignored and four reported being isolated when they were elite child athletes. All participants reported that the behaviour of their coaches changed and became more negative after they were identi?ed as elite performers. Participants reported feeling stupid, worthless, upset, less con?dent, humiliated, depressed, fearful and angry as a result of the behaviour of their coaches. The results provide tentative evidence that the behaviour of some coaches is a threat to the psychological well‐being of elite child athletes. Copyright © 2004 John Wiley & Sons, Ltd.     

Parametric Inference and Dynamic State Recovery From Option Panels

We develop a new parametric estimation procedure for option panels observed with error. We exploit asymptotic approximations assuming an ever increasing set of option prices in the moneyness (cross‐sectional) dimension, but with a fixed time span. We develop consistent estimators for the parameters and the dynamic realization of the state vector governing the option price dynamics. The estimators converge stably to a mixed‐Gaussian law and we develop feasible estimators for the limiting variance. We also provide semiparametric tests for the option price dynamics based on the distance between the spot volatility extracted from the options and one constructed nonparametrically from high‐frequency data on the underlying asset. Furthermore, we develop new tests for the day‐by‐day model fit over specific regions of the volatility surface and for the stability of the risk‐neutral dynamics over time. A comprehensive Monte Carlo study indicates that the inference procedures work well in empirically realistic settings. In an empirical application to S&P 500 index options, guided by the new diagnostic tests, we extend existing asset pricing models by allowing for a flexible dynamic relation between volatility and priced jump tail risk. Importantly, we document that the priced jump tail risk typically responds in a more pronounced and persistent manner than volatility to large negative market shocks.     

Responsible Innovation: A Pilot Study with the U.K. Engineering and Physical Sciences Research Council

Significant time lags between the development of novel innovations (e.g., nanotechnologies), understanding of their wider impacts, and subsequent governance (e.g., regulation) have led to repeated calls for more anticipatory and adaptive approaches that promote the responsible emergence of new technologies in democratic societies. A key challenge is implementation in a pragmatic way. Results are presented of a study with the Engineering and Physical Sciences Research Council, the largest public funder of basic innovation research in the United Kingdom who, for the first time, asked applicants to submit a risk register identifying the wider potential impacts and associated risks (environment, health, societal, and ethical) of their proposed research. This focused on nanoscience for carbon capture and utilization. Risk registers were completed conservatively, with most identified impacts concerning researchers' health associated with nanoparticle synthesis, handling, and prototype device fabrication, i.e., risks that could be identified and managed with a reasonable level of certainty. Few wider environmental impacts and no future impacts on society were identified, reflecting the often uncertain and unpredictable nature of innovation. However, some applicants addressed this by including investigators with expertise beyond engineering and nanosciences supporting integrated activities that included life cycle and real‐time technology assessment, which in some cases were also framed by stakeholder and/or public engagement. Proposals underpinned by a strong commitment to responsible science and innovation promoted continuous reflexivity, embedding a suite of multidisciplinary approaches around the innovation research core to support decisions modulating the trajectory of their innovation research in real‐time.     

Alternative Regionalism from Below: Democratizing ASEAN's Migration Governance

Most literature on migration governance has addressed the global level, and it has done so primarily from a state‐centric and top‐down perspective, with little regard to the role of civil society organizations in shaping its direction. Moreover, in an institutional sense, except for the EU, the regional level has only received scant attention, which is surprising given the significance of intra‐regional migration flows elsewhere. The Association of Southeast Asian Nations (ASEAN) is a case in point. Although there are few direct channels of engagement for civil society, the vibrant migrant rights community in Asia has been capitalizing on, and creating, opportunities at multiple levels including the regional. Our argument is that this creative use of channels of engagement in combined form at multiple levels can have democratizing potential.