An Adaptive,Rate‐Optimal Test of a Parametric Mean‐Regression Model Against a Nonparametric Alternative

We develop a new test of a parametric model of a conditional mean function against a nonparametric alternative. The test adapts to the unknown smoothness of the alternative model and is uniformly consistent against alternatives whose distance from the parametric model converges to zero at the fastest possible rate. This rate is slower than n^−1/2. Some existing tests have nontrivial power against restricted classes of alternatives whose distance from the parametric model decreases at the rate n^−1/2. There are, however, sequences of alternatives against which these tests are inconsistent and ours is consistent. As a consequence, there are alternative models for which the finite‐sample power of our test greatly exceeds that of existing tests. This conclusion is illustrated by the results of some Monte Carlo experiments.     

Correction Constants for Present Values of Seasonal Cash Flows

In a recent Decision Sciences article, McMath (1990) developed the correction constants approach for eliminating the end-of-year bias in the present value of streams with subannual cash flows. A limitation of this approach is that it assumes subannual cash flows are level. In many types of businesses, subannual cash flows follow a predictable seasonal pattern and, consequently, a present value estimate based upon a level correction constant is biased. This article derives a general formula for determining correction constants for seasonal cash flow patterns, examines the direction and magnitude of the seasonal bias, and applies seasonal correction constants to a capital budgeting problem.     

Resilience and risk competence in schools: theory/knowledge and international application in project rebound

Despite a 50-year interdisciplinary and longitudinal research legacy--showing that nearly 80% of young people considered most "at risk" thrive by midlife-only recently have practitioners/researchers engaged in the explicit, prospective facilitation of "resilience" in educational settings. Here, theory/knowledge distinguishing and extending risk and resilience from its risk-based social history to resilience's normative occurrence leads to the first known international and prospective application of resilience in school-based drug education, Project REBOUND [resilience-bound]. It will be implemented as a controlled pilot study, first in Germany, then expand to the United States, as well as other parts of Europe. With evaluation occurring throughout, the goal is to enhance the quality of drug decisions among young people, as well as support their overall competence-based learning and development throughout school. With limitations and underlying psychological mechanisms discussed, it is concluded Project REBOUND offers promising potential for supporting positive drug decisions as well as youth learning and development.     

Uncertainty and Variability in Health-Related Damages from Coal-Fired Power Plants in the United States

The health‐related damages associated with emissions from coal‐fired power plants can vary greatly across facilities as a function of plant, site, and population characteristics, but the degree of variability and the contributing factors have not been formally evaluated. In this study, we modeled the monetized damages associated with 407 coal‐fired power plants in the United States, focusing on premature mortality from fine particulate matter (PM_2.5). We applied a reduced‐form chemistry‐transport model accounting for primary PM_2.5 emissions and the influence of sulfur dioxide (SO₂) and nitrogen oxide (NO_x) emissions on secondary particulate formation. Outputs were linked with a concentration‐response function for PM_2.5‐related mortality that incorporated nonlinearities and model uncertainty. We valued mortality with a value of statistical life approach, characterizing and propagating uncertainties in all model elements. At the median of the plant‐specific uncertainty distributions, damages across plants ranged from $30,000 to $500,000 per ton of PM_2.5, $6,000 to $50,000 per ton of SO₂, $500 to $15,000 per ton of NO_x, and $0.02 to $1.57 per kilowatt‐hour of electricity generated. Variability in damages per ton of emissions was almost entirely explained by population exposure per unit emissions (intake fraction), which itself was related to atmospheric conditions and the population size at various distances from the power plant. Variability in damages per kilowatt‐hour was highly correlated with SO₂ emissions, related to fuel and control technology characteristics, but was also correlated with atmospheric conditions and population size at various distances. Our findings emphasize that control strategies that consider variability in damages across facilities would yield more efficient outcomes.     

A Model Curriculum for Occupational Social Work

This paper reports the results of a survey experiment in which a national sample of NASW members was presented with systematically altered versions of a summary of a hypothetical study of casework effectiveness and asked to make judgments about the quality of the research, its importance to social work, and its significance for their own practice. It was found that although respondents distinguished between studies with good and bad research designs, their judgments of the quality of the research and its implications for their own practice were significantly influenced by whether the findings were positive or negative.     

An Exploratory Study of the Meaning of Marriage for African Americans

Using specific tenets from symbolic interactionism as a frame, we asked 31 African Americans (18 women and 13 men) including students as well as nonstudents, across a variety of types of relationships and ages, what marriage meant to them. Two major themes, commitment and love, emerged from qualitative content analysis of the meaning of marriage. Other themes, including partnership/friendship, trust, family, and covenant, also emerged as themes, although less frequently. The overwhelming meanings of marriage were positive, with only a few negative instances (i.e., marriage as unnecessary and not fulfilling). Supportive qualitative data are presented for each theme. We discuss implications for the meaning of marriage for African Americans.     

Risk Factors for Infant Mortality in Nineteenth-Century Sweden

This study examines risk factors for infant mortality using individual-level data from a sample of parishes in northern Sweden in the nineteenth century. Sweden is of particular interest because of its unusually regular pattern of infant mortality decline during the century. We follow a sample of women longitudinally through their successive pregnancies and observe the mortality experience of each child. Exploratory and multivariate logistic regression analyses reveal an important intra-familial dimension to infant mortality that appears from the early stages of a woman's reproductive career. In addition, multivariate analyses by birth-order group suggest that ignoring intra-familial correlations of infant mortality may result in incorrect inferences. Siblings' shared probabilities of dying as infants suggest that high-birth-order children were not necessarily disadvantaged in any systematic way.