Multimedia Benchmarking Analysis for Three Risk Assessment Models: RESRAD, MMSOILS, and MEPAS

This paper is one in a series that describes results of a benchmarking analysis initiated by the Department of Energy (DOE) and the United States Environmental Protection Agency (EPA). An overview of the study is provided in a companion paper by Laniak et al. presented in this journal issue. The three models used in the study—RESRAD (DOE), MMSOILS (EPA), and MEPAS (DOE)—represent analytically-based tools that are used by the respective agencies for performing human exposure and health risk assessments. Both single media and multimedia benchmarking scenarios were developed and executed. In this paper, the multimedia scenario is examined. That scenario consists of a hypothetical landfill that initially contained uranium-238 and methylene chloride. The multimedia models predict the fate of these contaminants, plus the progeny of uranium-238, through the unsaturated zone, saturated zone, surface water, and atmosphere. Carcinogenic risks are calculated from exposure to the contaminants via multiple pathways. Results of the tests show that differences in model endpoint estimates arise from both differences in the models' mathematical formulations and assumptions related to the implementation of the scenarios.     

The assault on the self: Stages in coping with battering husbands

From interviews with women who have left battering relationships, we learn of their shifting definitions of the situation and their changing responses to their husbands' assaults. While some women may be more at risk for victimization than others, we see that victimization is a gradual process rather than an inherent quality of individual women. The process involves five stages: entering a violent relationship, managing the violence, experiencing a loss of self, re-evaluating the violent relationship, and restructuring the self. As the stages are discussed, variations in the definitional work of these women are also explained.     

The Family and Juvenile Delinquency*

This paper examines the effect of various “family variables” on the etiology of juvenile delinquency. These self-report data are unique in that they are from reports by parents of their child's behavior, the nature of the child's life at home, and parental perceptions of their relationship with the child. How the family and delinquency literature fit into control theory's conceptualization of the importance of a child's attachment to the family as a determinant of delinquency is evaluated. Variables measuring (1) family structure, (2) poor parental characteristics, (3) household characteristics, and (4) parent-child relationships are examined. The attachment variable was found to be the strongest predictor of delinquency and helps to “interpret” the effects of other variables that are significantly related to delinquency. The variables that predict male delinquency were found to be different from those that predict female delinquency. Characteristics of the parents' marriage play an important role for boys, while misbehavior of girls is more strongly predicted by variables measuring parent-child interaction and parental control.     

Emissions from Mass Burn Resource Recovery Facilities

Recent resource recovery facility stack tests have increased the available pool of data on emissions from these facilities. This has led to more accurate predictions of emissions from proposed facilities. The source, type, and rate of emissions presented are based upon a review of the literature, theoretical approaches, stack test data from existing facilities, permit levels of other facilities, and discussions with equipment manufacturers. The pollutants selected for study are those regulated by United States Environmental Protection Agency (USEPA) Prevention of Significant Deterioration (PSD) regulations and other pollutants of concern. The pollutants studied are particulate matter, sulfur dioxide, nitrogen oxides, carbon monoxide, nonmethane hydrocarbons, hydrogen sulfide, reduced sulfide, reduced sulfur compounds, total reduced sulfur, lead, mercury, beryllium, arsenic, cadmium, chromium, chromium +6, copper, manganese, nickel, vanadium, zinc, hydrogen chloride, fluorides, sulfuric acid mist, polynuclear aromatic hydrocarbons, polychlorinated biphenyls, vinyl chloride, dioxins, furans, formaldehyde, and asbestos.     

The chain-store paradox revisited

The rationality of predatory practices has been extensively debated among economists and lawyers. Selten (1978) considered a fictitious chain-store confronted with potential entrances of local competitors. In his formal analysis via an extensive game with complete and perfect information predatory behavior is precluded by the unique sequential (and perfect) equilibrium. Kreps and Wilson (1982b) and Milgrom and Roberts (1982) established in modified models with incomplete information that predation against early entrants may be rational since it creates a reputation to the effect that later potential entrants are deterred. The present paper offers a modification of Selten's model with complete but imperfect information which renders possible reputation and deterrence.     

Trends in Premarital Counseling*

Recent developments and current problems in the field of premarital counseling are discussed. Particular attention is given to the need for better training of premarital counselors and for more systematic evaluation of the impact of premarital counseling strategies.