When does an imperfect sampling frame produce more efficient estimators than a perfect frame?

The issue of when imperfect sampling frames can result in more efficient estimators of population totals than perfect frames is explored. Our analysis is based on an expression we call the difference score. We show how, when properly expanded it provides an illuminating basis for comparing a weighted estimator under an imperfect frame with that of a conventional estimator assuming the frame has been corrected. Specifically, the circumstances (i.e., population and frame characteristics) under which an imperfect frame results in estimates of population totals that are more precise than those from a perfect frame can in many cases be discerned by analytically examining the terms in the expansion of this difference score. In addition, a classification tree methodology was used to further explore circumstances under which imperfect frames result in more precise estimators. The results of this analytical study complement, strengthen, and in many cases explain those discovered in an earlier empirical investigation that lead to recommendations as to when to correct a frame or when to adjust for imperfection using a weighting methodology called the arc weight estimator.     

Consanguineous Marriage and Early Childhood Mortality in an Amish Settlement

Abstract

This paper examines the effect of inbreeding as a direct measure of consanguinity on early childhood mortality. Data are from a church directory of the Old Order Amish of the Lancaster, PA, settlement. The sample includes all infant deaths and a probability sample of survivors (total N = 1,823).

We find that inbreeding has a net positive effect on neonatal and infant deaths and on the instantaneous hazard rate. However, we also find socioeconomic and other explanations, even in this population, likely to experience certain genetically transmitted defects associated with infant mortality.     

Cultures have consequences: A configural approach to leadership across two cultures

This research compares the influence of country membership and cultural values (power distance and individualism/collectivism) in a model of LMX and organizational change. The results reveal cultural differences in the relationships among LMX, consultation and affective commitment to organizational change, supporting prior studies. However, there are substantial differences in the moderation of the cultural values in the relationships among the research constructs at the individual level. Our results suggest that understanding national culture and its influence on leadership may be incomplete when we focus only on mean differences at the country level to examine cross-cultural differences. To address this concern, we offer a configural approach to examine the role of culture in a leadership model across two cultures (the U.S. and Korea).     

Victimization,Aggression, and Other Problem Behaviors: Trajectories of Change Within and Across Middle School Grades

This study examined trajectories of victimization and problem behaviors within and across three grades of middle school. Participants were 2,166 adolescents from three urban middle schools in the United States who completed measures of victimization, physical and relational aggression, substance use, and delinquent behavior. Latent curve analyses modeled changes in each construct across 12 waves collected every 3 months. In each case, the best‐fitting model required separate linear slopes to represent changes within each grade and a factor representing decreases in the summers. Positive cross‐construct correlations were found for intercepts, linear slopes, and measures within waves. The findings suggest strong associations among victimization and problem behaviors, and individual differences in their patterns of change both within and across grades.     

The effect of current sexual behavior on friendship,dating, and marriage desirability

The purpose of this research was to extend previous studies examining the influence of a person's sexual behavior on others' perceptions of his/ her relationship desirability. Over 750 students from three universities judged the friendship, dating, and marriage desirability of a person based on information ostensibly provided by him/her about current sexual activity. Overall, the results indicated that a target person portrayed as engaging in low sexual activity in a current relationship was perceived to be more desirable as a friend and marriage partner than a person engaging in moderate or high sexual activity, whereas moderate or high sexual activity was preferred more in a dating partner. Whether the sexual activity occurred in a casual or steady dating relationship, however, also affected desirability perceptions. Finally, evidence was found for a reverse double standard in ratings of dating desirability: males were perceived as most desirable as a date when they engaged in moderate sexual activity, whereas females were perceived as most desirable as a date when they engaged in high sexual activity.     

Probability of living through a period of economic instability

Welfare Based on Assets, a Way to Smooth Out Economic Instability and Develop Children's Human Capital is a four-part series of reports that focuses on the relationship between economic instability (i.e., income shocks, asset shocks, home loss, and asset poverty) and children's human capital development. Collectively, these reports build on the compelling observation that the pattern low-income families walk into is a present time oriented or consumption based pattern of behavior; in contrast, the pattern higher income families walk into is future oriented or asset based. In this first paper we find that between 2005 and 2009 the probability of a low-income child living through an income shock is between 43% (major shock) and 55% (minor shock). In contrast, the chance of a high-income child experiencing an income shock is between 6% (major shock) and 15% (minor shock) during the same period. We also find that the probability that a child will experience a net worth asset shock close to doubles for a child living in a black or low-income family between 2005 and 2009 when compared to 2000 and 2004. Policy implications are discussed.     

Accumulating assets,debts in young adulthood: Children as potential future investors

Child Development Accounts (CDA) aim to open savings accounts in childhood as a way to lay a foundation for building assets in young adulthood and beyond. Mainstream banks may be key partners in opening the accounts in which children can build assets. While children may have limited savings to invest initially, they may increasingly invest over time by accumulating assets and debts through mainstream banks. Mainstream banks may benefit from children's increasing investments. This paper uses propensity score weighted, longitudinal data from the Panel Study of Income Dynamics and its supplements to examine savings, assets, debt, and net worth accumulation of young adults and whether or not they accumulate more when they have savings accounts as children. Young adults accumulate a median of $1000 in savings accounts, $4600 in total assets, $965 in debt (excluding student loans), and $4000 in net worth (excluding student loans). Young adults accumulate more savings and total assets when they have savings accounts as children. They accumulate less debt and more net worth when their households accumulate high net worth.