Environmental changes to increase physical activity: perceptions of older urban ethnic-minority women

Despite the numerous benefits of physical activity, older adults continue to be more sedentary than their younger counterparts, and sedentary behavior is more prevalent among older racial and ethnic minorities than among Whites. This study used the nominal group technique (NGT) to examine participants' perceptions of what neighborhood environmental changes would encourage greater physical activity for older African American and Hispanic women. Participants age 50-75 years were recruited from 2 urban community health clinics. Nine NGT sessions (45 participants) were conducted. The women were asked what changes in their neighborhood environment would encourage them to become more physically active. Responses to the research question were tabulated, and qualitative analysis was used to identify themes and categories. Major categories were physical environment changes, safety, and activities/social support. Although the physical environment received the greatest number of points, concerns for personal safety cut across categories. Participants indicated the need for more facilities in which to be active.     

The Role of Behavioral Theory in Model Development Research with Single Parent Families

In this paper, the authors critically examine the plight of single parent families with young children. Next, they lay out in detail the contributions of the behavioral perspective to practice model development research with single-parent families of children under the age of 12. The authors discuss implications for future theory driven practice model development research with cultural specific single parent families. They believe that future model development research efforts with culturally diverse single parent families will aid in advancing the state of cultural competence research in social work while assisting single parents relieve suffering and enhance child and family well-being.     

The effects of welfare and child support policies on union formation

We use data from a new longitudinal survey – the Fragile Families and Child Wellbeing Study – to examine how welfare and child support policies, and local labor market conditions, affect union formation among unmarried parents who have just had a child together. We use multinomial logistic regression to estimate the effects of the policy variables along with economic, cultural/interpersonal, and other factors on whether (relative to being in a cohabiting relationship) parents are not romantically involved, romantically involved living apart, or married to each other about one year after the child's birth. We find that – contrary to some previous research – higher welfare benefits discourage couples from breaking up, while strong child support enforcement reduces the chances that unmarried parents will marry; local unemployment rates do not appear to be strongly associated with union formation decisions after a nonmarital birth.     

Marriage Enrichment through Choice Awareness*

Choice Awareness is presented as a system which has helped couples make more constructive cognitive, affective, and behavioral choices. This system defines choice as behavior over which we have some control. Thus, choice is seen as a constant. CREST choices, caring, ruling, enjoying, sorrowing, and thinking/ working, include most behaviors, and are useful in enabling individuals to explore past behaviors and plan future interactions. Choice Awareness Workshops present the system through a structured group process which is useful in enriching a variety of relationships, including marriage. Research with the workshop process suggests gains in real-ideal marriage relationship congruence, and provides support for Choice Awareness theory.     

Sequential and Simultaneous Decision Making for Optimizing Health Care Resource Flexibilities

Health care administrators commonly employ two types of resource flexibilities (demand upgrades and staffing flexibility) to efficiently coordinate two critical internal resources, nursing staff and beds, and an external resource (contract nurses) to satisfy stochastic patient demand. Under demand upgrades, when beds are unavailable for patients in a less acute unit, patients are upgraded to a more acute unit if space is available in that unit. Under staffing flexibility, nurses cross‐trained to work in more than one unit are used in addition to dedicated and contract nurses. Resource decisions (beds and staffing) can be made at a single point in time (simultaneous decision making) or at different points in time (sequential decision making). In this article, we address the following questions: for each flexibility configuration, under sequential and simultaneous decision making, what is the optimal resource level required to meet stochastic demand at minimum cost? Is one type of flexibility (e.g., demand upgrades) better than the other type of flexibility (e.g., staffing flexibility)? We use two‐stage stochastic programming to find optimal resource levels for two nonhomogeneous hospital units that face stochastic demand following a continuous, general distribution. We conduct a full‐factorial numerical experiment and find that the benefit of using staffing flexibility on average is greater than the benefit of using demand upgrades. However, the two types of flexibilities have a positive interaction effect and they complement each other. The type of flexibility and decision timing has an independent effect on system performance (capacity and staffing costs). The benefits of cross‐training can be largely realized even if beds and staffing levels have been determined prior to the establishment of a cross‐training initiative.     

The Impact of Nonagility on Service Level and Project Duration*

“Why projects are late” is a fundamental issue in theory and in practice. One well‐established explanation is that a project's network structure can be a significant factor—the “fatter” or more parallel the project, the later the project completion. Herein we show that a lack of agility, which may frequently arise in projects when there are external resources, can also be a significant factor in project delays—both in more serial‐like projects as well as more parallel ones. Specifically, this article formally characterizes the concept of agility in projects, shows how a lack of agility can have a significant impact on a project, and gives some general properties on agility with respect to a project's structure.     

Sensitivity Analysis Revisted and Extended

The tolerance approach to sensitivity analysis in linear programming provides a framework for dealing with simultaneous and independent variations of the coefficients and terms. Specifically, the approach yields a maximum tolerance percentage which in turn characterizes a region of variability for the coefficients or terms. This paper shows how to expand this region of variability yielding ordinary sensitivity analysis as a special case of the tolerance approach.     

Prioritizing and Monitoring Concurrent Project Work: Effects on Switching Behavior

Project switching occurs when a multi‐project worker shifts his/her attention from one project to another before completing the first project. In this study, we study the effects of two areas of management policy on project switching behavior, project prioritization, and work monitoring. We conduct a controlled experiment to evaluate direct and combined effects of prioritization, scheduled progress checks, and managerial progress checks on project switching behavior in a distributed, multi‐project work environment. We use computerized tasks constituting multiple projects as a means of efficiently simulating a project work setting. Working professionals served as subjects for the experiment, thereby enabling us to control for experience and other individual differences that may vary across workers in real‐world projects. We find that clarifying priorities has little overall effect on the prevalence of switching in our multi‐project setting, while the presence of managerial progress checks has significant and distinct impacts, driving up switch tendencies. Interestingly, various attributes of the timing of these monitoring events also significantly impact the likelihood that workers will switch in response to these event triggers. We discuss the implications of these findings for managerial practice and for future research.     

Labor Force Participation and Socioeconomic Status*

This study examined the relationship between labor force participation by more than one family member and the socioeconomic status of the family, as measured by the Census SES score. The data were derived from a special tabulation of the 1960 Census five percent sample tape. In general, labor force participation by more than one family member was associated with higher SES scores in both white and Negro families. Multiple wage earners in white families were associated with “above the middle” level scores, whereas in Negro families multiple wage earners appear to contribute to barely or almost attaining middle level scores.