The potential impact of improvements in contraception on fertility and abortion in western countries

Survey information on fertility intentions, patterns of contraceptive use, contraceptive failures and abortions is used to develop estimates of unwanted births and of unplanned pregnancies for seven countries, by method of contraception. Potential improvements in contraception, leading to more use of highly efficient methods are considered, and several scenarios for improved contraceptive use are presented. The impact each would have on fertility levels and on abortion rates is estimated. Although improvements in contraception will have only a limited impact on fertility — which is already very low — their impact on abortion could be considerable     

Arbeitsteilung,Berufsorientierung und Partnerschaftsstabilität – Ehen und nichteheliche Lebensgemeinschaften im Vergleich*

The central finding of this paper is that the link between the division of labour and the risk of separation differs depending on the type of relationship. Marriages tend to be destabilised by the wife’s participation in the labour force and stabilised by the traditional division of labour. Empirical evidence of this is manifest in a positive effect of the wife’s income and a negative effect of the husband’s relative income on the likelihood of separation. In contrast to this, unmarried long-term relationships are stabilised by egalitarian division of labour. This is evident from the absence of negative effects of an employment of the female cohabiter on stability of relationship. Furthermore, in unmarried cohabitations the relative income of the man increases the risk of a separation. In addition to the income ratio, homogamous attitudes have explanatory value. Cohabitations are stable when both partners are career-oriented. This finding points to an egalitarian gender-role-orientation among unmarried men. It also implies that an egalitarian orientation has an impact on the living arrangement which needs to be accepted by both partners – for instance when family planning and timing of marriage are concerned.     

Rights of Love: the State and Intimate Relationships in Canada and the United States

This article puzzles through the contrasts and paradoxes arisingfrom state practices of relationship recognition in Canada andthe United States. In the Canadian case, the focus is on theassignment of legal status to common-law relationships, regardlessof whether the parties to the relationship desire that status.In the United States, in contrast, legislative attention hasbeen directed at the reinforcement of heterosexual marriage.These differing postures provoke questions regarding the rolesof intimate relationships in governing projects. In particular,what do these postures mean for the autonomy of individualsto construct their personal lives and how do they complicatethe designation "neoliberal" to Canadian and US regimes of governance.     

A Laboratory Training Model for the Development of Effective Interpersonal Communications in Social Work

This laboratory training model developed out of the observed difficulties students were having in bridging the gap between classroom and field. Students were confused and scared in their initial contacts with clients. They needed a neutral setting in which to practice the necessary communications skills.

The paper describes specific methods, techniques, and structure of two laboratories developed to meet these needs along with evaluations and conclusions.     

Extrapolation of Carcinogenicity Between Species: Qualitative and Quantitative Factors

Prediction of human cancer risk from the results of rodent bioassays requires two types of extrapolation: a qualitative extrapolation from short-lived rodent species to long-lived humans, and a quantitative extrapolation from near-toxic doses in the bioassay to low-level human exposures. Experimental evidence on the accuracy of prediction between closely related species tested under similar experimental conditions (rats, mice, and hamsters) indicates that: (1) if a chemical is positive in one species, it will be positive in the second species about 75% of the time; however, since about 50% of test chemicals are positive in each species, by chance alone one would expect a predictive value between species of about 50%. (2) If a chemical induces tumors in a particular target organ in one species, it will induce tumors in the same organ in the second species about 50% of the time. Similar predictive values are obtained in an analysis of prediction from humans to rats or from humans to mice for known human carcinogens. Limitations of bioassay data for use in quantitative extrapolation are discussed, including constraints on both estimates of carcinogenic potency and of the dose-response in experiments with only two doses and a control. Quantitative extrapolation should be based on an understanding of mechanisms of carcinogenesis, particularly mitogenic effects that are present at high and not low doses.