Household Headship Among Married Women: The Roles of Economic Power, Education, and Convention

Household headship historically has been equated with being the main economic provider of the household, a position usually occupied by men. This paper uses a change in the United States Census definition of household headship to examine whether headship for married women is associated with being the primary breadwinner in a marriage versus other non-economic explanations. According to microdata from the 1990 United States Census, women who are the main income providers in a marriage are much more likely to be household heads than women in co-provider marriages. There also is support for an egalitarian ideology explanation; that is, when both spouses are highly educated, the wife is more likely than the husband to be household head net of her relative economic independence in that marriage. Yet the force of convention remains strong given the low prevalence of headship among married women. The new census definition was meant partly to reflect the changing economic status of women. However, the reality is that conventional gender behaviors persist in household headship.     

Adoption and Antisocial Personality: Genetic and Environmental Factors Associated with Antisocial Outcomes

The present review critically evaluates evidence from adoption studies on the heritability of antisocial personality, interactions between genetic predispositions and the characteristics of adoptive mothers and fathers, and both the methodological and diagnostic shortcomings of existing studies. The article concludes with directions and suggestions for future research and practice.     

The Persistence of Outmoded Contraceptive Regimes: The Cases of Mexico and Brazil

Two of the most striking characteristics of contraceptive practice in the world today are the wide variation in patterns of use across countries and the tendency of the distribution of use by method to persist or narrow, even as new methods become available. The argument advanced in this article is that the disposition to commit to a reduced range of methods results from positive feedback in the process of contraceptive choice, and follows the logic of path dependence. The positive feedback derives, in large part, from social interaction among both the providers and the users of contraceptive methods. The persistence of outmoded contraceptive regimes is illustrated with the experience of Mexico and Brazil. In each case, it is argued that the conditions, events, and policies in the early stage of the adoption process have had a determinant bearing on the contraceptive practice prevailing in the late 1990s.     

Strategic planning and inflation

The author of this article argues that inflation is a neglected area in corporate planning despite the events of 1974/1975. The planning problem which companies face because of inflation is defined, while acknowledging that it is difficult to solve. Recent experience has shown that inflation has a direct impact on every major area of business. Thus it is essential that there is a meaningful attempt to handle these problems in planning. The author discusses his approach to grasping this nettle.     

德国关于电子电气设备的闭环供应链研究：一种生态效益计算方法

近来关于闭环供应链网络的文献中提出了两个重要问题：（1）如何制定平衡环境和经济效益的优化方案；（2）如何深刻理解二者间的效益背反关系。本文认为，针对环境和经济闭的效益边界及其背反关系进行全面探索，可以有效解决环境保护和经济发展中的效益平衡问题。为了解决求解效益边界的多变量问题，本文设计了一个针对目标函数中的数值进行指数计算的生态效益算法，并在德国电子电气设备闭环供应链设计中进行了实证研究。     

哈尔滨市博物馆利用对策

以哈尔滨市博物馆为研究对象，以不同人群对博物馆的使用需求和行为特征为切入点，通过分析博物馆的区位交通、周边环境及馆内存在的问题，为城市博物馆的建设与管理等方面提出建议，使博物馆能够良性发展，更好地承担起普及知识、教育大众、传承文化的责任。     

Going most of the way: “Technical virginity” among American adolescents

Reports from academic and media sources assert that many young people substitute non-vaginal sexual activities for vaginal intercourse in order to maintain what could be called “technical virginity.” Explanations for technical virginity, however, are based on weak empirical evidence and considerable speculation. Using a sample of 15–19-year-olds from Cycle 6 of the National Survey of Family Growth, we examine technical virginity and its motivations. The results suggest that religious adolescents are less likely than less-religious ones to opt for non-vaginal sex over total abstinence. Abstinence pledgers who are virgins are neither more nor less likely than nonpledgers who are virgins to substitute non-vaginal sex for intercourse. Moreover, religion and morality are actually the weakest motivators of sexual substitution among adolescents who have not had vaginal sex. Preserving technical virginity is instead more common among virgins who are driven by a desire to avoid potential life-altering consequences, like pregnancy and sexually transmitted diseases.