Multiplication
Infertility Insurance Mandates and Multiple Births
Kasey Buckles
Health Economics, forthcoming
Abstract:
In 2002, 15.4% of women of childbearing age in the USA reported struggles with infertility. Over the past 3 decades, drugs and assisted reproductive technologies have been developed to treat infertility, but treatment is costly. Since 1985, several states have adopted insurance mandates that require providers to cover or offer infertility treatments. In this paper, I examine the impact of strong mandate-to-cover laws on multiple births, which are associated with infertility treatment use. I also investigate whether the laws had heterogeneous treatment effects. Using birth certificate data from 1980-2002, I show that the laws had a small and statistically insignificant impact on multiple birth rates. However, I find that there were over 5300 mandate-induced triplet and higher-order births over the period, for which the delivery costs alone are estimated to be over $900 million. Increases in multiple birth rates are only observed for women over 30 and are greater for women who are married, white, or have a college degree. This is consistent with previous work, which finds that the mandates did not reduce disparities in treatment use.
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Experimental examination of women's selection criteria for sperm donors versus life partners
Debra Zeifman & Jennifer Ma
Personal Relationships, forthcoming
Abstract:
To evaluate factors shaping mate-selection decisions, 2 age groups of women were randomly assigned to hypothetical scenarios wherein they sought a sperm donor or life partner. Respondents were asked to (a) construct an ideal man and (b) rate and rank the importance of traits associated with good genes, parenting ability, partner potential, and economic resources. Women seeking donors valued good genes more and partner potential less than women seeking partners. Younger women sought greater degree of physical resemblance to donors than to partners. Older women showed greater desire to be similar to partners than donors on sociocultural characteristics. The findings suggest women adjust their selection criteria as a function of context and that mate preferences may change as women mature.
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Advancing paternal age and offspring violent offending: A sibling-comparison study
Ralf Kuja-Halkola et al.
Development and Psychopathology, August 2012, Pages 739-753
Abstract:
Children born to older fathers are at higher risk to develop severe psychopathology (e.g., schizophrenia and bipolar disorder), possibly because of increased de novo mutations during spermatogenesis with older paternal age. Because severe psychopathology is correlated with antisocial behavior, we examined possible associations between advancing paternal age and offspring violent offending. Interlinked Swedish national registers provided information on fathers' age at childbirth and violent criminal convictions in all offspring born from 1958 to 1979 (N = 2,359,921). We used ever committing a violent crime and number of violent crimes as indices of violent offending. The data included information on multiple levels; we compared differentially exposed siblings in within-family analyses to rigorously test causal influences. In the entire population, advancing paternal age predicted offspring violent crime according to both indices. Congruent with a causal effect, this association remained for rates of violent crime in within-family analyses. However, in within-family analyses, we found no association with ever committing a violent crime, suggesting that factors shared by siblings (genes and environment) confounded this association. Life-course persistent criminality has been proposed to have a partly biological etiology; our results agree with a stronger biological effect (i.e., de novo mutations) on persistent violent offending.
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Mothers who kill their offspring: Testing evolutionary hypothesis in a 110-case Italian sample
Andrea Camperio Ciani & Lilybeth Fontanesi
Child Abuse & Neglect, June 2012, Pages 519-527
Objectives: This research aimed to identify incidents of mothers in Italy killing their own children and to test an adaptive evolutionary hypothesis to explain their occurrence.
Methods: 110 cases of mothers killing 123 of their own offspring from 1976 to 2010 were analyzed. Each case was classified using 13 dichotomic variables. Descriptive statistics and hierarchical cluster analysis were performed both for cases and variables, and significant differences between clusters were analyzed.
Results: The Italian sample of neonaticides (killings of children within the first day of life) was found to satisfy all evolutionary predictions for an evolved behavioral, emotional and motivational pattern to increase fitness, showing a consistent profile for offending mothers. Relatively young, poor women with no partner kill their offspring non-violently, either directly or through abandonment, and they attempt to conceal the body. These women have no psychopathologies and never attempt suicide after killing their children. All neonaticide cases fall in a single cluster that is distinct from all other offspring killings by mothers. Infanticide (killing of children within the first year of life) and filicide (killing of children after the first year of life) do not significantly differ according to any of the variables measured. The common profile of mothers who have committed infanticide or filicide includes psychopathology, suicide or attempted suicide after killing their children, violent killing of their victims, and no attempt to conceal the victims' bodies. These results suggest that maternal infanticide and filicide represent an improper functioning of adaptation, and their profile are much more variable than those of neonaticide offenders.
Conclusion: Our study confirms that only neonaticide is an adaptive reproductive disinvestment, possibly evolved in the remote past, to increase the biological fitness of the mother by eliminating an unwanted newborn and saving resources for future offspring born in better conditions. Neonaticide is shown to be clearly distinct from infanticide and filicide and therefore should be approached, prevented, and judged differently.
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Alternative Paths to Parenthood: IVF or Child Adoption?
Gulcin Gumus & Jungmin Lee
Economic Inquiry, July 2012, Pages 802-820
Abstract:
This article analyzes the effects of child adoption on the utilization of assisted reproductive technology (ART) in the United States. Using state-level longitudinal data for 1999-2006, we show that ART use is responsive to changes in adoption markets. After controlling for state-specific fixed effects, our estimates reveal that a 10% increase in adoptions leads to a 1.3%-1.5% decrease in the number of ART cycles performed. The responsiveness is higher when we consider infant adoptions, adoptions by older women, and international adoptions, while there is no substitutability between ART and adoption of related children.
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Jeff Davis
Evolution and Human Behavior, forthcoming
Abstract:
This study presents a test of general life history theory by estimating the association between perceived environmental threat (PET) and reproductive outcomes among American youth. Data for the study came from the National Longitudinal Survey of Youth 1997-2009, which consists of a nationally representative sample of youth. Analyses were based on a subsample of N= 4748 respondents who were aged 12-14 years in 1997; reported having no biological children in 1997; and, for females, were not pregnant at the time of the 1997 interview. PET was measured using 11 questionnaire items that asked respondents about experiences with violent assaults from peers, witnessing violent assaults, and nonviolent crime victimization. First childbirth occurred earlier among respondents who reported higher PET in 1997. Average fertility during the study period was also higher among respondents with higher PET. Male and female respondents' reproductive behaviors were similarly associated with PET. However, only among female respondents was the association between PET and fertility moderated by the quality of the household environment.
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David Waynforth
Proceedings of the Royal Society: Biological Sciences, 7 August 2012, Pages 2998-3002
Abstract:
Life-history theoretical models show that a typical evolutionarily optimal response of a juvenile organism to high mortality risk is to reach reproductive maturity earlier. Experimental studies in a range of species suggest the existence of adaptive flexibility in reproductive scheduling to maximize fitness just as life-history theory predicts. In humans, supportive evidence has come from studies comparing neighbourhoods with different mortality rates, historical and cross-cultural data. Here, the prediction is tested in a novel way in a large (n = 9099), longitudinal sample using data comparing age at first reproduction in individuals with and without life-expectancy-reducing chronic disease diagnosed during childhood. Diseases selected for inclusion as chronic illnesses were those unlikely to be significantly affected by shifting allocation of effort away from reproduction towards survival; those which have comparatively large effects on mortality and life expectancy; and those which are not profoundly disabling. The results confirmed the prediction that chronic disease would associate with early age at first reproduction: individuals growing up with a serious chronic disease were 1.6 times more likely to have had a first child by age 30. Analysis of control variables also confirmed past research findings on links between being raised father-absent and early pubertal development and reproduction.
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The Toll of Fertility on Mothers' Wellbeing
Julio Cáceres-Delpiano & Marianne Simonsen
Journal of Health Economics, forthcoming
Abstract:
Using multiple births as source of variation, we study the impact of fertility on the overall wellbeing of mothers. First, using US Census data for the year 1980, we study the impact of number of children on family arrangements, welfare participation and poverty status. Second, using the National Health Interview Survey (NHIS) for the period 1982-2003, we study the impact on a series of health risk factors. The findings reveal, first, that an increase in family size increases the likelihood of marital breakdown. Second, we find evidence that mothers facing an increase in family size are not only more likely to live with other family members such as grandparents, aunts and uncles, they are also more likely to receive help from welfare programs. Third, consistent with an increase in welfare participation, families (mothers) are more likely to fall below the poverty line, and they face a reduction in total family income. The results using NHIS confirm a negative impact of fertility on marriage stability and an increase in welfare participation measured by the likelihood of using Medicaid and for some samples a reduction in the take-up of private health insurance. Finally, we find evidence that a shock in fertility increases the likelihood of mothers suffering from high blood pressure and becoming obese.
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Birth-Cohort Effects in the Association Between Personality and Fertility
Markus Jokela
Psychological Science, forthcoming
Abstract:
The present study investigated whether associations between individuals' personality traits and whether they have children have been modified by birth-cohort effects in the 20th-century United States. Participants were from the Midlife Development in the United States study (n = 6,259) and the Wisconsin Longitudinal Study (n = 3,994) and were born between 1914 and 1974. Data on personality traits of the Five Factor model and fertility history were collected in adulthood. Higher levels of openness to experience in both sexes and higher levels of conscientiousness in women were associated with lower fertility, and these associations strengthened linearly as birth cohorts became younger. In the total sample, high extraversion, low neuroticism, and women's high agreeableness were associated with high fertility rate, but there were no systematic cohort effects. The fertility decisions of people with certain personality traits may be influenced by prevailing societal and cultural circumstances.
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Michael Woodley & Gerhard Meisenberg
Personality and Individual Differences, forthcoming
Abstract:
In this study we attempt to determine whether dysgenic fertility is associated with the Jensen effect. This is investigated with respect to a US population representative sample of 8110 individuals from the National Longitudinal Survey of Youth for whom there exists complete data on IQ and fertility. In addition to the general sample, the sample was also broken out by race and sex so as to examine whether or not the Jensen effect manifested amongst different sub-populations. The method of correlated vectors revealed significant Jensen effects in five of the seven samples, and in all cases the effect was in a direction indicating that subtests with higher g-loadings were associated with larger dysgenic fertility gradients. The magnitude of the difference between Spearman's ρ and Pearson's r was non-significant in all cases, suggesting that biasing factors were minimally influencing the result. This finding suggests that dysgenesis occurs on the ‘genetic g' at the heart of the Jensen effect nexus, unlike the Flynn effect, which is ‘hollow' with respect to g. Finally, the finding is discussed in the context of two converging lines of evidence indicating that genotypic IQ or ‘genetic g' really has been declining over the last century.
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Estimating the Prevalence of Nonpaternity in Germany
Michael Wolf et al.
Human Nature, June 2012, Pages 208-217
Abstract:
The prevalence of nonpaternity in human societies is difficult to establish. To obtain a current and fairly unbiased estimate of the nonpaternity rate in Germany, we analysed a dataset consisting of 971 children and their parents in whom human leukocyte antigen (HLA) typing had been carried out in the context of bone marrow transplantation. In this sample, nine exclusions (0.93%) could be identified on the basis of more than 300 HLA-haplotypes defined by four HLA genes. Given this number of exclusions, a maximum likelihood estimate of the nonpaternity rate in the population of 0.94% was obtained with asymptotic 95% confidence limits of 0.33% and 1.55%, respectively. This result is in accordance with recent surveys as well as findings from Switzerland for a comparable sample, and it suggests that earlier estimates of the nonpaternity rate which were often in excess of 10% may have been largely exaggerated.
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Causes and Consequences of Skewed Sex Ratios
Tim Dyson
Annual Review of Sociology, 2012, Pages 443-461
Abstract:
Slightly more males are born in the world than females. But because male mortality is usually greater, in old age groups there are many more women than men. The situation is particularly stark in the former Soviet Union, where male adult death rates are exceptionally high. In much of Asia, strong son preference has long informed unusually high female child mortality. And the impact of this on population sex ratios has been reinforced by the recent spread of sex-selective abortion. Especially in China, there is an unusually large number of boys relative to girls. Sex ratios are also skewed by migration, most notably male labor migration. Unbalanced sex ratios have many effects. Among other things, research has focused on the consequences of male outmigration for those who are left behind and on the implications of the coming heightened masculinity of young adult populations in Asia, e.g., with respect to marriage and crime.
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Kelly Raley, Yujin Kim & Kimberly Daniels
Journal of Marriage and Family, August 2012, Pages 866-879
Abstract:
The analyses described in this article investigated the association between adolescent fertility expectations and college enrollment (N = 7,838). They also explored the potential impact of fertility expectations and events on college persistence among 4-year (n = 2,605) and 2-year (n = 1,962) college students. The analysis, which used data from the National Longitudinal Survey of Youth 1997 cohort, showed a significant association between expectations for early parenthood and the likelihood of going to a 4-year college or 2-year college for both men and women. In addition, the authors found that pregnancies were associated with an increased risk of college dropout for women; however, if all of the estimated effect of pregnancies on the risk of dropout were causal, they would still not be a major factor contributing to educational attainment because fertile pregnancies among college women are so rare.
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Alain Labrique et al.
Reproductive Health Matters, June 2012, Pages 113-117
Abstract:
As many low- to middle-income countries strive to achieve targets of reduced maternal, neonatal and infant mortality set by the Millennium Development Goals, health system innovations which can accelerate progress are being carefully examined. Among these are technologies and systems which aim to strengthen frontline health workers and the health systems within which they work, by enabling the registration of pregnancies, births and outcomes. Accurate, population-based numerators and denominators can help to improve accountability of the health system to provide expected routine antenatal and post-natal care, as well as emergency support and referral, as needed. The enumeration of women of reproductive age, followed by prospective, voluntary registration of pregnancies has the potential to support governments, health agencies, and the populations they serve, to ensure public health service delivery and to guide informed policies.
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Contraceptive Insurance Mandates and Consistent Contraceptive Use Among Privately Insured Women
Brianna Magnusson et al.
Medical Care, July 2012, Pages 562-568
Introduction: Half of the states in the United States mandate that health insurers cover contraceptives. Health care reform includes recommendations to extend these mandates nationally through the essential benefits package. This study evaluates the association of state-level insurance mandates and consistent contraceptive use among privately insured women aged 15-44.
Study Design: The National Survey of Family Growth (2006-2008) included 2276 privately insured women at risk for unintended pregnancy. Multilevel logistic regression models provided estimates of the association between state-level insurance coverage mandates and consistent contraceptive use.
Results: Among privately insured women, 18% reported a ≥1-month gap in contraceptive use. Compared with women living in states with no mandates, those in states with comprehensive mandates had increased odds of consistent contraceptive use among privately insured women [adjusted odds ratio (aOR), 1.64; 95% confidence interval (CI), 1.08-2.50], but not uninsured women (aOR, 0.77; 95% CI, 0.38-1.55). Partial mandates were not associated with consistent contraceptive use.
Discussion: Consistent contraceptive use among women with private insurance is higher in the states with mandates compared with those without mandates.