Comparing Estimates of the Effects of Air Pollution on Human Mortality Obtained Using Different Regression Methodologies

Studies using regression techniques report their results using a variety of statistics. Evaluation of the consistency of findings, such as in a metaanalysis, requires calculating the statistical estimates of the effect reported in each study in a comparable manner. In this paper, we consider multiple linear regression, multiple Poisson regression, and logistic regression estimates. We present results that are needed to calculate, on a common basis, the slope of the regression function at a specified value, the elasticity function of the regression function at a specified value, the relative risk at a specified value, and the odds ratio at a specified value. We apply these results to studies of the association of daily mortality in an area to the daily air pollution level of ozone and PM₁₀. We calculate the estimated slope of the number of deaths per billion population associated with an increase of 1 ppb of ozone level in studies of daily mortality in three urban areas. These studies, in Los Angeles, New York, and St. Louis, produced very comparable results on a common basis, especially when compared to the coefficients as reported. We also calculated the estimated elasticity function of the daily mortality and daily PM₁₀ level for eight areas and found that the elasticities varied within a factor of roughly two, much less than the variability in the coefficients as reported.     

Environmental Politics: the Structuring of Partisan and Ideological Cleavages in Mass Environmental Attitudes*

This paper explores the impacts of political party identification and political ideology on two dimensions of mass environmental beliefs—awareness of environmental problems and support for environmental reform. We argue that while the environmental movement's mobilization of public awareness of environmental problems was essentially non-partisan, more recent movement efforts to achieve environmental reforms have taken a discernible “reform liberal” stance of advocating state regulation of the private sector. Neither political party identification nor political ideology has a substantial effect on awareness of environmental problems. Anti-laissez-faire political liberalism proves to be highly correlated with support for environmental reform, particularly among the middle class. Despite the major impact of political liberalism on support for environmental reform, there are no partisan differences in such support. We discuss the theoretical and practical implications of the notion that political-ideological differences in support for environmental reform exist despite political parties.     

The Use of the Chronological Chart in General Systems Family Therapy

The author describes a method for keeping track of family events and their impact on each of the family members by use of a chronological chart. Detailing the ways in which information from family stores can be collected and recorded, he indicates the chart's value in integrating and presenting information to families so that new options can be attempted.     

A Typology of Families - Five Family Systems

This typology of families is composed of five family systems named “Two Against the World”, “Children Come First”, “Share and Share Alike”, “Every Man for Himself”, and “Until Death Do Us Part”. Each may occur as a pure form but mixtures are common. Variables such as purity of the system, timing of the emergence of a system and the family's flexibility in shifting from one system to another determine outcomes for sickness or health. The therapist's ability to recognise these systems gives coherence to family therapy and improves its effectiveness.     

The Expectation-Threshold model of reproductive decision making

It is proposed that as expectations about parenting become increasingly high, couples have an increasing tendency to decide to have a(or another) child. Similarly, as parenting expectations become increasingly low, couples have an increasing tendency to decide on sterilization. Couples without extremely high or low expectations continue to use contraceptives. Expectations are defined as Subjective Expected Utilities (SEUs) for having or not having a child. Preliminary results support the model and suggest that the threshold for making these decisions is not at neutral, but is conservative so that couples must have fairly high or low expectations before making such binding decisions are parenting or sterilization. The fact that data reveal that this exists supports the Expectancy-Threshold model, but it also requires a change in SEU Theory's maximization rule for some kinds of decisions.The authors wish to thank Carole Baker, former executive Director of the National Alliance for Optional Parenthood, and the board members of that organization for their cooperation, and Dr. Barbara Beach who helped with the data analysis. Funding was provided, in part, by The Center for Studies in Demography and Ecology, University of Washington, through a grant, No. 5 P30 HDO 9397, from the National Institute for Child Health and Human Development     

The Distribution of Sums of Rounded Percentages

When percentages are computed for counts in several categories or for several positive measurements0 each taken as a fraction of their sum, the rounded percentages often fail to add to 100 percent. We investigate how frequently this failure occurs and what the distributions of sums of rounded percentages are for (1) an empirical set of data, (2) the multinomial distribution in small samples, (3) spacings between points dropped on an interval-the broken-stick model-; and (4) for simulation for several categories. The several methods produce similar distributions.We find that the probability that the sum of rounded percentages adds to exactly 100 percent is certain for two categories, about three-fourths for three categories, about two-thirds for four categories, and about [Formula: see text] for larger numbers of categories, c, on the average when categories are not improbable.     

Environmental and Resource Sociology: Theoretical Issues and Opportunities for Synthesis1

Abstract Rural sociologists have been disproportionately represented among the major contributors to environmental sociology. In part, this is because several areas of longstanding rural sociological interest (e.g., sociology of resource management and outdoor recreation, studies of resource-dependent communities) essentially came to be redefined as environmental sociology during the 1970s. The most significant role of rural sociologists in building environmental sociology, however, has perhaps been the fact that the material and biophysical nature of the phenomena they have traditionally studied contributed to a general predisposition to recognize the “materiality” of social structure and social life. I assess the major strategies that have been developed for theorizing this materiality, and then indicate some of the most critical lines of debate and dissension. I argue that if these debates are examined in their specifics—rather than as incompatible perspectives or “paradigms”—some opportunities for synthesis become apparent. Some suggested avenues of synthesis are set forth.     

The Career Counseling Process With Racial-Ethnic Minorities: The Case of Asian Americans

Using Derald Sue's framework for examining the counseling process with racial-ethnic minority clients, the author develops a new model to examine the career counseling process with Asian Americans in terms of culturally appropriate and inappropriate process and outcomes. Recommendations for culturally appropriate career counseling interventions are also offered from this integrated framework.     

Supportive parenting moderates the effect of discrimination upon anger, hostile view of relationships, and violence among African American boys

Studies have shown that exposure to discrimination increases the probability that African American adolescents will engage in delinquent behavior, especially acts of violence. The present study extended this research by examining the extent to which supportive parenting buffers a youth from these deleterious consequences of discrimination. Analyses based upon two waves of data from a sample of 332 African American adolescent males and their caretakers supported this hypothesis. Further the results indicated that there are two avenues whereby supportive parenting reduces the probability that discrimination will lead to violence. First, supportive parenting decreases the chances that discrimination will lead to anger and a hostile view of relationships. Second, supportive parenting lowers the risk that anger or a hostile view of relationships, when they develop, will result in violence.