Relationship of income and childlessness

ABSTRACT

We investigated the impact of diabetes on US life expectancy by sex and race/ethnicity using a prospective cohort study design. Cohorts were drawn from 1997 to 2009 waves of the National Health Interview Survey and linked to death records through December 31, 2011. We combined data on the prevalence of diabetes among decedents with estimates of the hazard ratios of individuals diagnosed with diabetes to calculate population attributable fractions (PAFs) by age, sex, and race/ethnicity at ages 30 and above. These estimates were then applied to deaths in the official US life table for 2010 to estimate effects of diabetes on life expectancy.

Diabetes was responsible for a reduction of 0.83 years of life expectancy for men at age 30 and 0.89 years for 30-year-old women. The impact was greatest among Black women at 1.05 years. Estimates based on traditional demographic and actuarial methods using the frequency with which a disease appears as an underlying cause of death on death certificates produced a reduction in life expectancy at age 30 of only 0.33 years.

We conclude that diabetes is substantially reducing US longevity and that its effect is seriously underestimated when using data on underlying causes of death.     

Divorce in Ethiopia: the impact of early marriage and childlessness

Forty-five per cent of first marriages in Ethiopia end in divorce within 30 years, and two-thirds of women who divorce do so within the first 5 years of marriage. This paper looks at two factors that may have an impact on the risk of divorce in Ethiopia: early age of first marriage, and childlessness within the first marriage. Data used were from the 1990 National Family and Fertility Survey conducted by the Government of Ethiopia. A total of 8757 women of reproductive age (15-49) were analysed. Life table analysis was used to determine the median age at first marriage, first birth and the median duration of marriage. Cox models were analysed to determine the differentials of divorce. The results of this analysis showed that both early age at marriage and childlessness have a significant impact on the risk of divorce. An inverse relationship was found between age at marriage and risk of divorce. Having a child within the first marriage also significantly reduced the risk of divorce. In addition, several cultural and socioeconomic variables were significant predictors of divorce.     

Family background, schooling and childlessness in Australia

Using data from Wave 1 of the Household Income and Labour Dynamics in Australia (HILDA) survey, this paper analyses the extent to which childlessness among Australian women aged 40-54 years varies according to the size and type of family in which they were brought up, and the level and type of schooling they had. Multilevel logistic analysis shows that having been educated in a non-government school, having stayed at school to year 12, having a small number of siblings, at age 14 having a father who was either dead or absent, at age 14 having a father who was employed in a professional occupation, or being a migrant from North or West Europe, North America, East Asia or South-East Asia, all are significantly associated with higher rates of childlessness among women in the 40-54 years age range. The effects of these early lifecourse variables on marital and socioeconomic status in later life, and hence on childlessness, are also considered. The implications of the findings for fertility trends and for Australia's public debate are discussed.     

Correlates of voluntary childlessness in a select population

In order to determine a sociological profile of voluntarily childless couples, 72 couples who had applied to the Association for Voluntary Sterilization for help in obtaining surgical sterilizations were surveyed. No pretense is made that this sample is representative of all childless couples, but this study provides the first step of such research. The average couple in this group was living in a large metropolitan area, about 30 years old, and had been married about 5 years. They tended to be of high socioeconomic status and claimed no religious affiliation. Most had been contracepting for several years, usually with the pill, and were not likely to have had a miscarriage or abortion. Population concerns and health considerations were found to be the 2 most mentioned reasons for these couples' desired childlessness. Other reasons included career commitments, lifestyle, or economic desires. Less common motivations for childlessness included dislike of children and fear of pregnancy. Before significant research on voluntary childlessness can be conducted, some accurate means of selecting a representative sample must be developed.     

Voluntary childlessness among American men and women in the late 1980's.

Most studies of childlessness in the United States have relied on unrepresentative, opportunistic samples collected in a variety of ways. Thus, the relationship of various correlates to childlessness is not well known. Some studies have focused on demographic variables, but have not examined attitudinal factors associated with childlessness--something the opportunistic samples have been able to do. In this paper we examine both attitudinal and demographic factors associated with childlessness in the United States. The data used in this paper are from the National Survey of Families and Households collected in 1987 and 1988. The data set includes both demographic data, perceived advantages and disadvantages of having children, and attitudinal data about related social issues. Overall, the rate of voluntary childlessness was not high. Only 3.5 per cent of the men and 2.8 per cent of the women reported that they were childless and did not expect to have children. Only one category of people (unmarried men and women over the age of 35) had rates that exceeded ten per cent. A combined variable of age and marital status was the best predictor of childlessness. A scale of reasons or justifications for having children was the next best predictor. In addition, attendance at religious services, number of hours the respondents desired to work and education (for women only) were related to childlessness. Those who scored highly on measures of support for traditional families and support of extended families also tended to have lower rates of childlessness. Occupational status, religious denomination, and race, on the other hand, were not significantly related to childlessness. Measures of gender equality, religious fundamentalism, and support for mothers working were also not related to childlessness.     

Dispossession and empowerment in the ethnography of Palestinians in the occupied territories

This article is a review of two recent ethnographies on Palestinians in the West Bank: Resistance, Repression, and Gender Politics in Occupied Palestine and Jordan, by Frances Hasso (2005), and Law, Violence and Sovereignty Among West Bank Palestinian by Tobias Kelly (2006). Hasso examines the significant and unique role of women in organizing the Democratic Front for the Liberation of Palestine in the Occupied Territories, as compared to Jordan, while Kelly examines the jurisdictional and practical problems of labor disputes for male workers in a West Bank village. The two books exemplify how ethnographies of Palestinians in the Occupied Territories oscillate between documenting dispossession and empowerment.     

Factors in the incidence of childlessness in Canada: An analysis of census data

The impact of the 1918 influenza pandemic on human fertility has been subject to significant scholarly debate. The current study characterizes the inter-temporal association between excess deaths during the pandemic and the subsequent birth deficit by identifying the length of time between these two phenomena using cross-correlations of monthly death and birth data from Taiwan from 1906 to 1943. The analysis demonstrates a strong and negative correlation between deaths (d) at time t and births (b) at time t + 9 (r_db(9) = –0.68, p < .0001). In other words, a significant drop in births was observed nine months after pandemic mortality peaked. The findings suggest that the 1918 influenza pandemic impacted subsequent births primarily through the mechanism of reduced conceptions and embryonic loss during the first month of pregnancy rather than through late-first-trimester embryonic loss.     

Factors in the incidence of childlessness in Canada: an analysis of census data

Due to the difficulties involved in attempting to determine the relative proportion of involuntary childlessness and of voluntary childlessness in a given population, many investigators insist that the problem can only be examined in small-scale studies using intensive psychological interviewing techniques. A method for assessing the causes of childlessness in a population using census materials is described. If a distinction is made between psychological and physiological causes, instead of between intentional and unintentional causes, it is possible to assess the relative importance of these causes using large-scale investigation techniques. Physiological causes include all physiological conditions which produce sterility. Psychological causes include both psychosomatic infertility and the voluntary decision not to have children. The method involves using the minimum rate of childlessness in a population group known to place a high value on fertility as an estimate of the rate of physiological childlessness in the population. This estimate is then subtracted from the childlessness rate observed in other population groups in the same society in order to determine the degree of psychological childlessness in these other population groups. This method was used to assess the causes of childlessness in Canada. Census materials were used to determine the minimum rate of childlessness among rural women in Quebec. Since this group is primarily Catholic and places a high value on children, its childlessness rate provides an estimate of the proportion of sterile couples in the population. This rate was then subtracted from the childlessness rates for urban Canadian women, and the remainder provided an estimate of psychological childlessness among urban women. Age of marriage was controlled for since rural women married at younger ages. Study findings were 1) the proportion of childlessness among urban women declined over the years as 15.2% of the women over 45 years old were childless while only 10.8% of the women, aged 30-44, were childless; 2) the proportion of physiological childlessness declined from 6.6% among women over 45 years old to 4.6% among women, aged 30-44; and 3) approximately 50% of the cases of childlessness among urban women were due to psychological factors. These findings do not support the contentions of some investigators that 10% of the population is sterile and that psychological childlessness is rare. Study findings were presented in tabular form.     

Involuntary childlessness: a neglected problem in poor-resource areas

¹ Correspondence address. Nieuwe Prinsengracht 130, Gebouw G, 1018 VZ Amsterdam, The Netherlands. E-mail: f.vanbalen{at}uva.nl/vabalen{at}hotmail.com Childlessness is analysed on the individual, the national andthe international level. On the individual level five categoriesof consequences are described: grief and sadness; social isolationand stigma; restricted rights; religious effects and economicaspects. The first category concerns individual feelings andthe others are socio-cultural effects in broad-sense. In developingcountries childlessness has consequences on individual and socio-culturallevel. In the West consequences are mostly restricted to individualfeelings. In poor-resource areas there are limited possibilitiesfor modern biomedical treatment. Traditional medicine, withits easy access and cultural acceptation, is a serious ‘competitor’.On the national level there are few incentives and possibilitiesfor development of adequate infertility treatment. Though localand national authorities might be sensitive to the problem,allocation of funds is mostly determined by international agencies,which consider other issues more important. On the internationallevel Western perceptions about the urgency of health issuesare still dominant. In the Western world there is little interestand understanding in the problem of ‘barrenness amongplenty’ because a focus on population growth reductionand on other problems. Also, the perception of childlessnessas an individual problem, makes it difficult to change thisattitude. Possibilities for change are discussed.     

Shapes and sizes of badger territories

We examine closely the models, methods and conclusions of Doncaster and Woodroffe (1993; Oikos 66: 88–93 who argued that den or main sett sites of clans of badgers, Meles meles , are particularly important in determining territory shape and size, and hence influence the size of social group. We consider a realistic alternative hypothesis which allows the key assertion by Doncaster and Woodroffe to be directly tested. We show that a Dirichlet tessellation model that does not give a major role to the main setts fits data from several studies – two of those considered by Doncaster and Woodroffe, and a more recent and extensive one – significantly better than Doncaster and Woodroffe's model. For the majority of territories, especially in the most extensive data set, differences in territory shape and size under the two models are substantial, suggesting that a different biological mechanism is at work, as well as or instead of dependence on main sett locations.     

Communal defense of territories and the evolution of sociality

The evolution of group living has attracted considerable attention from behavioral ecologists working on a wide range of study species. However, theoretical research in this field has been largely focused on cooperative breeders. We extend this line of work to species that lack alloparental care (hereafter termed "noncooperative species") but that may benefit from grouping by jointly defending a common territory. We adopt a demographically explicit approach in which the rates of births and deaths as well as the dispersal decisions of individuals in the population determine the turnover rates of territories and the competition for breeding vacancies thus arising. Our results reveal that some of the factors thought to affect the evolution of cooperative breeding also affect the evolution of group living in noncooperative species. Specifically, high fecundity and low mortality of resident individuals both increase the degree of habitat saturation and make joining an established group more profitable for nonresidents (floaters). Moreover, if floaters can forcefully take over territories, the degree of habitat saturation also affects the chance that residents become targets of takeovers. In this situation, communal defense of territories becomes an important benefit that further promotes the evolution of group living.