Income,Relationship Quality,and Parenting: Associations With Child Development in Two‐Parent Families

Prior research suggests considerable heterogeneity in the advantages of living in a 2‐parent family. Specifically, children living with married biological parents exhibit more favorable outcomes than children living with cohabiting biological parents and with married and cohabiting stepparents. To explain these differences, researchers have focused almost exclusively on differences in the levels of factors such as income, parental relationship quality, and parenting quality across family types. In this study the authors examined whether differences in the benefits associated with these factors might also account for some of the variation in children's cognition and social‐emotional development. Focusing on children at the time they enter kindergarten, they found only weak evidence of differences in benefits across family types. Instead, they found that children living in stepfather families experienced above‐average levels of parental relationship quality and parenting quality, which in turn played a protective role vis‐à‐vis their cognitive and social‐emotional development.     

Lean Control for Make‐to‐Order Companies: Integrating Customer Enquiry Management and Order Release

A lead time that is short, predictable, and reliable is an increasingly important criterion in supplier selection. Although many companies may achieve this through lean implementation, high‐variety manufacturers, for example, small and medium‐sized make‐to‐order companies, have found that lean's planning and control techniques do not apply. This article outlines a planning and control concept known as workload control (WLC) that integrates customer enquiry management, including a due‐date setting rule, with order release control. Simulation is then used to assess its impact on shop performance. Results demonstrate that an integrated WLC concept can reduce the percentage of tardy jobs—so short lead times can be realistically quoted—while also reducing and stabilizing workloads. WLC can level demand and production over time when work is not standardized and it is not possible to synchronize flows on the shop floor. Results are shown to be robust to changes in routing characteristics, the mix of orders with due dates specified by the customer and proposed internally, and the strike rate (or order‐winning probability). Hence, an integrated approach to WLC represents an important step toward achieving lean in make‐to‐order companies.     

Family planning program effects on contraceptive use in Morocco, 1992–1995

This study illustrates the use of panel data and a fixed-effects estimator to investigate the impact of family planning program inputs on contraceptive utilization in Morocco during the 1992–1995 period. By controlling the potential bias resulting from common unobserved determinants of program resource allocation decisions and program outcomes, the methodology helps overcome an important constraint to the use of non-experimental study designs in undertaking meaningful impact assessments. Data from a panel of women interviewed in both the 1992 and 1995 Morocco Demographic and Health Surveys were used in the study, along with program data from Service Availability Modules undertaken in conjunction with each survey round. The results indicate that changes in the family planning supply environment, in particular increased presence of nurses trained in family planning and the level of infrastructure at public clinics, played a significant role in the increased use of modern contraceptives during the study period.     

INTEGRATING EMPIRICAL RESEARCH INTO THE PUBLIC POLICY PROCESS: AN ILLUSTRATION

A number of critical questions have arisen surrounding the value of using empirical data and analytical procedures in the formulation of social and/or public policy. This exploratory study illustrates how multivariate analyses can contribute to an objective formulation of compromise positions on a complex public policy issue. Both multidimensional scaling and analysis of variance were used to study how the perceptions of three divergent key influential groups could be integrated into a final legislative package. This researchbased methodology provides a more logical approach to public policy formulation than that typically offered by political compromise.     

Experimental Analysis of Neighborhood Effects

Families, primarily female‐headed minority households with children, living in high‐poverty public housing projects in five U.S. cities were offered housing vouchers by lottery in the Moving to Opportunity program. Four to seven years after random assignment, families offered vouchers lived in safer neighborhoods that had lower poverty rates than those of the control group not offered vouchers. We find no significant overall effects of this intervention on adult economic self‐sufficiency or physical health. Mental health benefits of the voucher offers for adults and for female youth were substantial. Beneficial effects for female youth on education, risky behavior, and physical health were offset by adverse effects for male youth. For outcomes that exhibit significant treatment effects, we find, using variation in treatment intensity across voucher types and cities, that the relationship between neighborhood poverty rate and outcomes is approximately linear.     

“MANAGING THE DECISION SCIENCE TECHNOLOGY: A CASE FOR ETHICAL ANALYSIS?”-COMMENT

In the current issue of Decision Sciences, Brightman [2] argues that the growth of the discipline should be managed, and individual decision scientists must ultimately be held accountable for the ethical implications of implementing their research findings. The purpose of this comment is to examine several principles behind Brightman's arguments and to initiate a discussion of some of the important issues that have been raised. The distinction between the inquiry and technological imperatives and questions about the universality of moral reasoning at the ethical-principles leverl further Brightman's analysis and pose important considerations for decision scientists.     

Freezing the Master Production Schedule: Implications for Fill Rate*

Previous research examining alternative ways of dealing with schedule instability has shown that freezing a portion of the master production schedule (MPS) is a cost effective way to reduce instability. While it is often argued that MPS freezing limits the firm's ability to react to changing customer needs, the impact of freezing on customer service is not well understood. We examined the impact of freezing a specified portion of the MPS on the average fill rate under a wide variety of conditions using controlled simulation experiments. The results show that freezing can be implemented without causing a severe reduction in customer service.     

A GOAL PROGRAMMING MODEL FOR ALLOCATING HUMAN RESOURCES FOR THE GOOD LABORATORY PRACTICE REGULATIONS

The Food and Drug Administration's final Good Laboratory Practice regulation will have a far-reaching effect on testing laboratories that are conducting nonclinical laboratory safety tests. This paper develops a goal programming decision model suitable for setting objectives, meeting budgetary and operational constraints, planning personnel utilization, and evaluating different proposals for allocating laboratory personnel to implement a program.