In this paper, we consider neighborhood selection as a social process central to the reproduction of racial inequality in neighborhood attainment. We formulate a multilevel model that decomposes multiple sources of stability and change in longitudinal trajectories of achieved neighborhood income among nearly 4000 Chicago families followed for up to seven years wherever they moved in the United ...

Tactile stimuli provide animals with important information about the environment, including physical features such as obstacles, and biologically relevant cues related to food, mates, hosts and predators. The antennae, the principal sensory organs of insects, house an array of sensory receptors for olfaction, gustation, audition, nociception, balance, stability, graviception, static electric fi...

Both reproductive medicine and genetics are seeing rapid, and in some instances revolutionary, medical and scientific advances. Courtshavebeencailedupontoresolveavariety of novel disputes arising from these areas, and more can be anticipated as these technologies continue to develop and their use becomes more widespread. This article discusses some of the most relevant areas of the law and liti...

The international commitments to reproductive rights are part of an increasingly globalised discourse on social policy. The globalisation of social policy discourse generally is evident both in the growing universalism of social policy agendas, including both the adoption of rights-based approaches and in social sector reform, and in attempts to discover and utilise a global language for social...

Perennial social insects are characterized by the extraordinarily long lifespan of their reproductive females, which may be tens or hundreds of times larger than that of non-social insects of similar body size and also greatly surpasses that of conspecific non-reproductives. Evolutionary theories of aging explain this phenomenon from the low extrinsic mortality queens experience once they have ...

We like to believe that human societies are the most complex in the animal kingdom, with intricate family structures and a unique repertoire of sophisticated social interactions. A new study reveals an insect society so complex that we are forced to reconsider our role as conquerors of complexity.

the rate of multiple pregnancy has dramatically increased during the past decades, along with the diffusion of assisted reproduction technology (art). multiple pregnancy entail an increased risk of, at times life threatening, maternal complications i.e. pre-eclampsia, eclampsia or abruptio placenta, of serious neonatal hazards, i.e. extreme prematurity or growth retardation, as well as deleteri...

This study aims to estimate the prevalence of adolescent pregnancy (AP) in three Brazilian cities Salvador, Rio de Janeiro, and Porto Alegre and to examine the profiles of pregnant girls and their partners in relation to pregnancy outcomes. Data for a retrospective assessment of AP were collected using an interview-based household survey applied to a stratified sample of males and females aged ...

This paper studies optimal pay-as-you-go social security with positive bequests and endogenous fertility. With an investment externality, a competitive solution without social security suffers from under-investment in capital and over-reproduction of population. We show that social security can improve welfare by reducing fertility and increasing capital intensity. We also illustrate numericall...