When is a family a family? Evidence from survey data and implications for family policy

This article examines the correspondence between common assumptions about the American family and actual patterns. The assessment is based on national data on individuals, households, and families. Findings indicate that the coresident nuclear model should be considereda model rather thanthe model of family. Past as well as current marital ties need to be considered in defining “family,” and divorce rather than death should be the expected cause of losing the main breadwinner in the family, except among elderly women. Parent-child ties to either young or adult children often span separate households. Coresidents can include individuals other than nuclear family members, and change rather than stability is the modal pattern in living arrangements. Rather than shaping concepts of the family from a single mold, policy makers and researchers are better advised to recognize the diversity and fluidity in family and household structures. Her major research interests include economics of the family, intergenerational transmission, intergenerational transfers, labor economics, and poverty and welfare. She received her Ph.D. in Economics from the University of Michigan in 1977.     

Love,Marriage and the Division of Labor*

In this questionnaire study young engaged men and women were asked about the importance of love in marriage and the meaning of the concept “love.” Marital goals and criteria for mate choice were also explored. A highly consistent image of marriage as an institution in which to realize a comprehensive companionship with a partner of compatible temperament and life goals emerged. These findings have demonstrable implications for existing theoretical formulations concerning the dysfunctional aspects of the love marriage in contemporary American society in which it is contended that “romantic idealization” during courtship leads to a high incidence of dissatisfaction and disruption. Findings from numerous studies are assimilated to present an alternative explanation for marital conflict in the context of the modern division of labor in which the spheres of work and the family are poorly integrated, particularly in view of sharp role segregation by sex.     

打造高效利用能源的供应链

随着能源价格、能源储备，以及气候变化等问题逐渐在全球范围内引起关注，越来越多的公司开始把注意力转向一个长久不为人重视，但能源消耗却是最为严重的地方——供应链。简单来说，供应链是一个集生产和分销于一体的网络，它包括原料采购、产品制造、运输、分销、消费和废物处理等各个环节。     

The social regulation of grief

This article explores the social regulation of grief as a function of normative criteria that assign differential social merit to different kinds of major relationship losses. Grief scholarship has been built largely on conventional assumptions about intimate attachment and its loss that overlook the possibility that the loss of an intimate other may not confer a socially legitimate right to grieve. This suggests the importance of understanding both the grief role and the subjective experience of grief itself as socially constructed. The social regulation of grief is examined in terms of the loss of de-moralized intimate relationships — those that are socially undervalued as well as those that are socially devalued, or stigmatized.     

Wheelchair coasting downhill is a reliable work task

OBJECTIVE: To measure test-retest reliability of physiological responses during submaximal wheelchair downhill and horizontal treadmill ergometry. DESIGN: A test-retest design was used on a convenience sample. Four male and three female non-wheelchair users, (22-43 years of age) propelled or coasted in a wheelchair under steady-state conditions. Four minute work bouts were performed at 1, 2, 3, and 4 km/hr. (0.62, 1.24, 1.86 and 2.5 mph, respectively) at 0 degrees, -2 degrees, and -4 degrees. Subjects were studied twice under each of the 12 conditions. Six tests were performed daily, with testing occurring over four days. Dependent variables included oxygen consumption, minute ventilation and heart. Intraclass correlation coefficients were determined for each set of paired tests. RESULTS: Intraclass correlation coefficients were high for absolute VO_{2}(R=0.84-0.99), V_{E} (R=0.86-0.98) and HR (R=0.95-1.0) over the range of 4 speeds and 3 inclinations studied. On average, % differences from test 1 to test 2 were less than 3%. CONCLUSION: At the treadmill speeds and inclinations (positive and negative) studied in this investigation, untrained wheelchair users responded in a physiologically reliable manner.     

Families With Young Children: A Review of Research in the 1990s

Research conducted in the past decade on families with young children concentrated on 5 broad topics: (a) the transition to parenthood; (b) the importance of maternal sensitivity for children's attachment security and subsequent adjustment and social competence; (c) the effectiveness of particular parenting styles and practices; (d) interparental, familial, and broader societal factors influencing parenting behaviors and child adjustment; and (e) the impact of family structure and household composition on children's well‐being. Our review documents substantial diversity in family structures, parenting arrangements, and childrearing values and practices both within and across ethnic and racial groups. Collectively, the evidence suggests that in most families with young children, parents and children seem to be doing well. We conclude that substantial work is required to expand the study of families with young children beyond mother‐child dyads in White, middle‐class, two‐parent, first‐marriage families.     

Parental Conformity Expectations' Effect on Twins' and Singletons' Parent–Adolescent Relationships: Associations With Change in Adjustment From Middle Childhood to Adolescence

Growing use of in vitro fertilization (IVF) has resulted in an elevated twin birth rate, and a burgeoning population of IVF twins who are now aging into adolescence and beyond. This study tests a model examining whether parental conformity expectations have differential effects on twins' versus singletons' parent–adolescent relationship satisfaction, and if this effect is indirectly associated with relative changes in twins' and singletons' internalizing and externalizing behavior from middle childhood to adolescence. Using a sample of 278 IVF twins and singletons, path models demonstrate that twin status and conformity expectations interact to influence parent–adolescent relationships. Although there was an association between twin status and mother–adolescent relationship satisfaction among parents with high conformity expectations (r = .25, p < .01), this relationship was nonsignificant among parents with low conformity expectations (r = .05, p = .85). The differential effect of conformity expectations on parent–adolescent relationship satisfaction for twins and singletons was indirectly associated with relative changes in twins' and singletons' externalizing behavior from middle childhood to adolescence. Results demonstrate that higher levels of parental conformity expectations may not have the same effect on adolescent twins and singletons.