Child Wellbeing in Two-Parent Families: How Do Characteristics and Relationships Matter?

We use data from the Fragile Families and Child Wellbeing Study to examine the role of individual and family characteristics, as well as mother-father and parent-child relationships, with regard to differences in wellbeing for children living with their biological mother and either their biological father or a social father. We find that accounting for these factors produces a large decrease in the association between two-parent family type and cognitive skills, but does little to explain the association between family type and externalizing behavior problems, given suppressor effects of several of the father characteristics and relationship measures. Furthermore, results from Blinder-Oaxaca decompositions suggest that differences in cognitive skills can largely be explained by differences in the characteristics and behaviors of the individuals comprising biological- and social-father families, whereas differences in externalizing behavior problems predominantly reflect differences in returns to (effects of) these characteristics and behaviors for children in the two family types.parents, children, relationships, welfare, wellbeing, martial status

Income and Child Development

We examine how income influences pre-school children’s cognitive and behavioral development, using new data from a birth cohort study of children born at the end of the 20th century. On average, low income children have lower PPVT scores, more mother-reported aggressive, withdrawn, and anxious behavior problems, and also more interviewer-reported problems with behavior, than more affluent children. For most outcomes, differences in the home environments are sufficient to explain the link between low income and poorer child outcomes. Policy simulations indicate that income transfers can potentially play an important role in reducing gaps in development between poorer and richer children.

Prenatal Cocaine Exposure: Long‐Run Effects and Policy Implications

In this article, we review the literature regarding prenatal cocaine exposure and child development. We then reexamine current child welfare policies in light of that literature, paying particular attention to laws that mandate reporting substance‐exposed newborns and substance use during pregnancy as well as policies that view such reports as prima facie evidence of child maltreatment. Finally, we reassess the utility of such policies, given our current knowledge of the long‐term effects of prenatal exposure, and consider alternative approaches to protecting children who are born to parents who are using crack cocaine

Parenting Practices of Resident Fathers: The Role of Marital and Biological Ties

This paper uses data from the Fragile Families and Child Wellbeing Study to examine differences in the parenting behaviors of resident biological and social fathers on measures of engagement, shared responsibility, and cooperation in parenting. Regression, difference-in-difference, and decomposition techniques are used. Results suggest that biological and social fathers differ significantly on most parenting measures (and in some unexpected ways), but that a considerable portion of these differences can be explained by differences in the background characteristics of the individuals and families in each group. Additionally, the analyses reveal a stronger link between marriage and higher-quality parenting behaviors for social-father families than for biological-father families.

Spatio-Temporal Scaling of Solar Surface Flows

The Sun provides an excellent natural laboratory for nonlinear phenomena. We use motions of magnetic bright points on the solar surface, at the smallest scales yet observed, to study the small scale dynamics of the photospheric plasma. The paths of the bright points are analyzed within a continuous time random walk framework. Their spatial and temporal scaling suggest that the observed motions are the walks of imperfectly correlated tracers on a turbulent fluid flow in the lanes between granular convection cells.Comment: Now Accepted by Physical Review Letter

First-Year Maternal Employment and Child Outcomes: Differences Across Racial and Ethnic Groups

We use data from the Fragile Families and Child Wellbeing Study to examine associations between first-year maternal employment and child outcomes for 3-year-old white, Black, and Hispanic children. We find that first-year maternal employment is associated with lower vocabulary scores for white, but not Black or Hispanic, children and with elevated levels of aggressive behavior problems for Hispanic, but not white or Black, children. Factors such as the timing and intensity of employment, family structure, and maternal education sometimes moderate these associations, but do not explain differences across racial and ethnic groups. Child care and parenting behaviors do not appear to mediate associations between first-year maternal employment and children’s outcomes and cannot explain racial and ethnic differences in these associations.

Minimax Estimation of a Normal Mean Vector for Arbitrary Quadratic Loss and Unknown Covariance Matrix

Let X be an observation from a p-variate normal distribution (p ≧ 3) with mean vector θ and unknown positive definite covariance matrix Σ̸. It is desired to estimate θ under the quadratic loss L(δ,θ,Σ̸)=(δ−θ)tQ(δ−θ)/tr(QΣ̸), where Q is a known positive definite matrix. Estimators of the following form are considered: δc(X,W)=(I−cαQ−1W−1/(XtW−1X))X, where W is a p × p random matrix with a Wishart (Σ̸,n) distribution (independent of X), α is the minimum characteristic root of (QW)/( n−p−1) and c is a positive constant. For appropriate values of c,δc is shown to be minimax and better than the usual estimator δ0(X)=X

Space-Time Distribution of G-Band and Ca II H-Line Intensity Oscillations in Hinode/SOT-FG Observations

We study the space-time distributions of intensity fluctuations in 2 - 3 hour sequences of multi-spectral, high-resolution, high-cadence broad-band filtergram images (BFI) made by the SOT-FG system aboard the Hinode spacecraft. In the frequency range 5.5 < f < 8.0 mHz both G-band and Ca II H-line oscillations are suppressed in the presence of magnetic fields, but the suppression disappears for f > 10 mHz. By looking at G-band frequencies above 10 mHz we find that the oscillatory power, both at these frequencies and at lower frequencies too, lies in a mesh pattern with cell scale 2 - 3 Mm, clearly larger than normal granulation, and with correlation times on the order of hours. The mesh pattern lies in the dark lanes between stable cells found in time-integrated G-band intensity images. It also underlies part of the bright pattern in time-integrated H-line emission. This discovery may reflect dynamical constraints on the sizes of rising granular convection cells together with the turbulence created in strong intercellular downflows.Comment: 24 pages, 15 figure