Managing ‘difference’: understanding age diversity in practice

This article explores how human resource (HR) managers discuss, classify and justify age diversity as both a concept and practice within the UK. The findings from 33 in-depth interviews with HR managers reveal difficulty in translating age diversity as an abstract managerial concept into workfloor policy and practice. Whilst the managers sought to emphasise the role of culture in promoting diversity, there was a lack of evidence that this related to workfloor equality or activities that proactively challenge discrimination. Moreover, there was confusion over classifying older workers as ‘diverse’, and risking possible discriminatory practices which marginalised both the older workers and other employees. The conclusions discuss how the ambiguous concept of ‘difference’ which lies at the basis of understanding both diversity and discrimination caused tension when implementing older worker strategies, and how policy makers must provide clear measures concerning the intent, objectives and definitions surrounding age equality. It is argued that a move towards an action model of discrimination management may help to create a framework where diversity and discrimination can be mutually addressed

Minimum Age Difference as a Requisite for Adoption

Recent incidents of abortive uses of adoption statutes have pointed up the possible need for a healthy change in our adoption laws: the inclusion of a required age difference between adopter and adoptee. The author urges that such a statutory requirement is necessary to more fully effectuate the idea that adoption imitates nature, a postulate of adoption law originating in Roman jurisprudence and, so the author contends, underlying adoption law in this country. The article raises interesting questions concerning the very nature of adoption, the function which it serves in our society, and the possible policy differences between minor and adult adoptions

Minimum Age Difference as a Requisite for Adoption

Recent incidents of abortive uses of adoption statutes have pointed up the possible need for a healthy change in our adoption laws: the inclusion of a required age difference between adopter and adoptee. The author urges that such a statutory requirement is necessary to more fully effectuate the idea that adoption imitates nature, a postulate of adoption law originating in Roman jurisprudence and, so the author contends, underlying adoption law in this country. The article raises interesting questions concerning the very nature of adoption, the function which it serves in our society, and the possible policy differences between minor and adult adoptions

The Age Difference between the Globular Cluster Sub-populations in NGC 4472

The age difference between the two main globular cluster sub-populations in the Virgo giant elliptical galaxy, NGC 4472 (M 49), has been determined using HST WFPC2 images in the F555W and F814W filters. Accurate photometry has been obtained for several hundred globular clusters in each of the two main sub-populations, down to more than one magnitude below the turn-over of their luminosity functions. This allows precise determinations of both the mean colors and the turn-over magnitudes of the two main sub-populations. By comparing the data with various population synthesis models, the age-metallicity pairs that fit both the observed colors and magnitudes have been identified. The metal-poor and the metal-rich globular clusters are found to be coeval within the errors ($\sim 3$ Gyr). If one accepts the validity of our assumptions, these errors are dominated by model uncertainties. A systematic error of up to 4 Gyr could affect this result if the blue and the red clusters have significantly different mass distributions. However, that one sub-population is half as old as the other is excluded at the 99% confidence level. The different globular cluster populations are assumed to trace the galaxy's major star-formation episodes. Consequently, the vast majority of globular clusters, and by implication the majority of stars, in NGC 4472 formed at high redshifts but by two distinct mechanisms or in two episodes.Comment: 32 pages, including 12 postscript figures, accepted for publication in the Astronomical Journal, December 1999 issu

Age differences between sexual partners, behavioural and demographic correlates, and HIV infection on Likoma Island, Malawi

Patterns of age differences between sexual partners-"age-mixing"-may partially explain the magnitude of HIV epidemics in Sub-Saharan Africa. However, evidence of age-disparity as a risk factor for HIV remains mixed. We used data from a socio-centric study of sexual behaviour in Malawi to quantify the age-mixing pattern and to find associations between relationship characteristics and age differences for 1,922 participants. Three age difference measures were explored as predictors of prevalent HIV infection. We found that for each year increase in male participant age, the average age difference with their partners increased by 0.26 years, while among women it remained approximately constant around 5 years. Women in the study had larger within-individual variation in partner ages compared to men. Spousal partnerships and never using a condom during sex were associated with larger age differences in relationships of both men and women. Men who were more than five years younger than their partners had 5.39 times higher odds ( 95% CI: 0.93-31.24) of being HIV-infected than men 0-4 years older. The relationship between HIV-infection and age-asymmetry may be more complex than previously described. The role that women play in HIV transmission should not be underestimated, particularly in populations with large within-individual variation in partner ages

The age of white dwarf companions

Original paper can be found at: http://www.iop.org/EJ/conf DOI: 10.1088/1742-6596/172/1/012019 [16th European White Dwarfs Workshop]We carried out a spectroscopic investigation of single lined white dwarfs (WDs) in double degenerate (DD) systems and discuss their binary evolution. Simulated spectra of the Hα region are used to derive upper limits on the temperature of the invisible component and thus lower limits on the cooling age. This is done for a range of hypothetical secondary masses and a minimum cooling age deduced. Results are compared with the well known parameters of the visible primary, which allows us to determine a lower limit for the cooling age difference of both WDs. Most of the ten systems in our sample have a minimum age difference of not larger than 0.5 Gyr and their small orbital separation is highly suggestive of at least one unstable mass transfer phase. However, a stable first mass transfer phase is feasible as the age difference is less then 1 Gyr. The results imply that unstable mass transfer is the most likely final contact binary scenario to have occurred in DD systems but the first mass transfer phase is not constrained.Peer reviewe

A statistical test on the reliability of the non-coevality of stars in binary systems

We develop a statistical test on the expected difference in age estimates of two coeval stars in detached double-lined eclipsing binary systems that are only caused by observational uncertainties. We focus on stars in the mass range [0.8; 1.6] Msun, and on stars in the main-sequence phase. The ages were obtained by means of the maximum-likelihood SCEPtER technique. The observational constraints used in the recovery procedure are stellar mass, radius, effective temperature, and metallicity [Fe/H]. We defined the statistic W computed as the ratio of the absolute difference of estimated ages for the two stars over the age of the older one. We determined the critical values of this statistics above which coevality can be rejected. The median expected difference in the reconstructed age between the coeval stars of a binary system -- caused alone by the observational uncertainties -- shows a strong dependence on the evolutionary stage. This ranges from about 20% for an evolved primary star to about 75% for a near ZAMS primary. The median difference also shows an increase with the mass of the primary star from 20% for 0.8 Msun stars to about 50% for 1.6 Msun stars. The reliability of these results was checked by repeating the process with a grid of stellar models computed by a different evolutionary code. We show that the W test is much more sensible to age differences in the binary system components than the alternative approach of comparing the confidence interval of the age of the two stars. We also found that the distribution of W is, for almost all the examined cases, well approximated by beta distributions. The proposed method improves upon the techniques that are commonly adopted for judging the coevality of an observed system. It also provides a result founded on reliable statistics that simultaneously accounts for all the observational uncertainties.Comment: Abstract shortened. Accepted for publication in A&A. One reference fixe

An Age Difference of 2 Gyr between a Metal-Rich and a Metal-Poor Globular Cluster

Globular clusters trace the formation history of the spheroidal components of both our Galaxy and others, which represent the bulk of star formation over the history of the universe. They also exhibit a range of metallicities, with metal-poor clusters dominating the stellar halo of the Galaxy, and higher metallicity clusters found within the inner Galaxy, associated with the stellar bulge, or the thick disk. Age differences between these clusters can indicate the sequence in which the components of the Galaxy formed, and in particular which clusters were formed outside the Galaxy and later swallowed along with their original host galaxies, and which were formed in situ. Here we present an age determination of the metal-rich globular cluster 47 Tucanae by fitting the properties of the cluster white dwarf population, which implies an absolute age of 9.9 (0.7) Gyr at 95% confidence. This is about 2.0 Gyr younger than inferred for the metal-poor cluster NGC 6397 from the same models, and provides quantitative evidence that metal-rich clusters like 47 Tucanae formed later than the metal-poor halo clusters like NGC 6397.Comment: Main Article: 10 pages, 4 figures; Supplementary Info 15 pages, 5 figures. Nature, Aug 1, 201

More Jobs? A Panel Analysis of the Lisbon Strategy

We assess the impact on employment growth of the Lisbon Strategy, examining long-run trends in total, female and old-age employment rates from 1994 to 2009. We find that the Strategy had some favourable (but weak) impact, especially for old-age workers. However, no improvement ensued from its mid-term reassessment.European Employment Strategy, difference-in-difference, employment policies