Family Structure and the Economic Wellbeing of Children

An extensive literature that examines the relationship between family structure and children's outcomes consistently shows that living with a single parent is associated with negative outcomes. Few studies, however, directly test the relationship between family structure and outcomes for the child once he/she reaches adulthood. We directly examine, using the Panel Study of Income Dynamics, whether family structure during childhood is related to the child's economic wellbeing both during childhood as well as adulthood. Our findings suggest that the economic wellbeing of children of mothers who experience a marital dissolution and remarry are no different from the children of mothers who are continuously married. However, the children of mothers whose marriages dissolve but who do not remarry experience large declines in their income over their first ten years of life. We also show that while the children of never married mothers earn a lot less as adults than the children of married parents, these differences can largely be explained by demographic and socioeconomic factors. Finally, our findings suggest that children who have mothers who experience a marital dissolution and who do not remarry have economic losses that persist into adulthood. Robustness checks using family fixed effects models support this result

Family Structure and the Economic Mobility of Children

Compares the economic mobility, both absolute and relative, of children of continuously married mothers, divorced mothers, and unmarried mothers by race and family income level. Explores the role of racial differences in family structure and implications

Incompressible immiscible multiphase flows in porous media: a variational approach

We describe the competitive motion of (N + 1) incompressible immiscible phases within a porous medium as the gradient flow of a singular energy in the space of non-negative measures with prescribed mass endowed with some tensorial Wasserstein distance. We show the convergence of the approximation obtained by a minimization schem\`e a la [R. Jordan, D. Kinder-lehrer \& F. Otto, SIAM J. Math. Anal, 29(1):1--17, 1998]. This allow to obtain a new existence result for a physically well-established system of PDEs consisting in the Darcy-Muskat law for each phase, N capillary pressure relations, and a constraint on the volume occupied by the fluid. Our study does not require the introduction of any global or complementary pressure

Warp-speed adaptation to novel hosts after 300 generations of enforced dietary specialisation in the seed beetle Callosobruchus maculatus (Coleoptera: Chrysomelidae: Bruchinae)

Thank you to Paul Eady for providing C. maculatus to initiate our laboratory population and advice on rearing them. The study was funded by the University of Aberdeen core teaching funds (honours project budget to TP), and by a doctoral training grant to AL from the BBSRC-EastBio doctoral training partnershipPeer reviewedPublisher PD

Cross-middleware Interoperability in Distributed Concurrent Engineering

Secure, distributed collaboration between different organizations is a key challenge in Grid computing today. The GDCD project has produced a Grid-based demonstrator Virtual Collaborative Facility (VCF) for the European Space Agency. The purpose of this work is to show the potential of Grid technology to support fully distributed concurrent design, while addressing practical considerations including network security, interoperability, and integration of legacy applications. The VCF allows domain engineers to use the concurrent design methodology in a distributed fashion to perform studies for future space missions. To demonstrate the interoperability and integration capabilities of Grid computing in concurrent design, we developed prototype VCF components based on ESA’s current Excel-based Concurrent Design Facility (a non-distributed environment), using a STEP-compliant database that stores design parameters. The database was exposed as a secure GRIA 5.1 Grid service, whilst a .NET/WSE3.0-based library was developed to enable secure communication between the Excel client and STEP database

Probing the Geometry of Supernovae with Spectropolarimetry

We present results from a spectropolarimetric survey of young supernovae completed at the Keck Observatory, including at least one example from each of the major supernova types: Ia (1997dt), Ib (1998T, 1997dq), Ib/c-pec (1997ef), IIn (1997eg), and II-P (1997ds). All objects show evidence for intrinsic polarization, suggesting that asphericity may be a common feature in young supernova atmospheres.Comment: 4 pages, 2 figures. To appear in the Proceedings of the 10th Annual October Astrophysics Conference in Maryland: Cosmic Explosion

Financial Intermediation and Entry-Deterrence: A survey

In this paper, we summarize the findings of a series of our papers on the relationship between financial contracting and the game of entry-deterrence in a dynamic context.The incumbent has private information about its cost and enters into an agency relationship with a lender in each of the two periods. We examine the effect of this agency relationship on the probability of entry and limit pricing on the one hand and the effect of the game of entry-deterrence on the form of the financial contract on the other. The three papers make different assumptions about the uncertainty of demand and the informational structure.

A stochastic model for wound healing

We present a discrete stochastic model which represents many of the salient features of the biological process of wound healing. The model describes fronts of cells invading a wound. We have numerical results in one and two dimensions. In one dimension we can give analytic results for the front speed as a power series expansion in a parameter, p, that gives the relative size of proliferation and diffusion processes for the invading cells. In two dimensions the model becomes the Eden model for p near 1. In both one and two dimensions for small p, front propagation for this model should approach that of the Fisher-Kolmogorov equation. However, as in other cases, this discrete model approaches Fisher-Kolmogorov behavior slowly.Comment: 16 pages, 7 figure