Socioeconomic Disadvantage and Early Childbearing

We examine the empirical relationship between socioeconomic disadvantage and rates of early childbearing. First, we use data from the Panel Study of Income Dynamics (PSID) to confirm a strong correlation at the individual level - women who grow up "disadvantaged" are much more likely to give birth as teens. Then we aggregate Vital Statistics microdata from 1968 through 2003 to conduct a cohort-based analysis of the relationship between rates of socioeconomic disadvantage of a birth cohort and the cohort's subsequent early childbearing experiences. Our cohort level analysis implies an even tighter intergenerational correlation between rates of background disadvantage and early childbearing. But, when our analysis econometrically controls for fixed state and year of birth effects in the model to account for cultural and other differences across cohorts, the relationship between rates of disadvantage and early childbearing is found to be quite modest. For example, the elasticity of early childbearing rates by age 18 with respect to the probability of being born to a mother under age 18 is only 0.05. This suggests that broader, societal forces are far more important in determining rates of early childbearing than rates of socioeconomic disadvantage per se.

Subsidized Contraception, Fertility, and Sexual Behavior

This paper examines the impact of recent state-level Medicaid policy changes that expanded eligibility for family planning services to higher income women and to Medicaid clients whose benefits would expire otherwise. We begin by establishing that the income-based policy change led to a substantial increase in the number of program recipients. We then examine Vital Statistics birth data from 1990 to 2003 and determine that it also reduced overall births to non-teens by about two percent and to teens by over four percent. Our estimates suggest a nearly nine percent reduction in births to women age 20-44 made eligible by the policy change. We supplement our state-level analysis with an investigation of individual-level data from the 1988, 1995, and 2002 National Surveys of Family Growth (NSFG) to examine the impact of these policies on sexual behavior and contraceptive use. Evidence from this analysis suggests that the reduction in fertility associated with raising income thresholds for eligibility was accomplished via greater use of contraception. Our calculations indicate that allowing higher income women to receive federally-funded family planning cost on the order of $6,800 for each averted birth.

Income Inequality and Early Non-Marital Childbearing: An Economic Exploration of the "Culture of Despair"

Using individual-level data from the United States and a number of other developed countries, we empirically investigate the role of income inequality in determining rates of early, non-marital childbearing among low socioeconomic status (SES) women. We present robust evidence that low SES women are more likely to give birth at a young age and outside of marriage when they live in more unequal places, all else held constant. Our results suggest that inequality itself, as opposed to other correlated geographic factors, drives this relationship. We calculate that differences in the level of inequality are able to explain a sizeable share of the geographic variation in teen fertility rates both across U.S. states and across developed countries. We propose a model of economic “despair” that facilitates the interpretation of our results. It reinterprets the sociological and ethnographic literature that emphasizes the role of economic marginalization and hopelessness into a parsimonious framework that captures the concept of “despair” with an individual’s perception of economic success. Our empirical results are consistent with the idea that income inequality heightens a sense of economic despair among those at the bottom of the distribution.

Alien Registration- Kearney, Jennie B. (Auburn, Androscoggin County)

https://digitalmaine.com/alien_docs/31092/thumbnail.jp

One-Dimensional Directed Sandpile Models and the Area under a Brownian Curve

We derive the steady state properties of a general directed ``sandpile'' model in one dimension. Using a central limit theorem for dependent random variables we find the precise conditions for the model to belong to the universality class of the Totally Asymmetric Oslo model, thereby identifying a large universality class of directed sandpiles. We map the avalanche size to the area under a Brownian curve with an absorbing boundary at the origin, motivating us to solve this Brownian curve problem. Thus, we are able to determine the moment generating function for the avalanche-size probability in this universality class, explicitly calculating amplitudes of the leading order terms.Comment: 24 pages, 5 figure

Media Influences on Social Outcomes: The Impact of MTV’s 16 and Pregnant on Teen Childbearing

Abstract: This paper explores how specific media images affect adolescent attitudes and outcomes. The specific context examined is the widely viewed MTV franchise, 16 and Pregnant, a series of reality TV shows including the Teen Mom sequels, which follow the lives of pregnant teenagers during the end of their pregnancy and early days of motherhood. We investigate whether the show influenced teens ’ interest in contraceptive use or abortion, and whether it ultimately altered teen childbearing outcomes. We use data from Google Trends and Twitter to document changes in searches and tweets resulting from the show, Nielsen ratings data to capture geographic variation in viewership, and Vital Statistics birth data to measure changes in teen birth rates. We find that 16 and Pregnant led to more searches and tweets regarding birth control and abortion, and ultimately led to a 5.7 percent reduction in teen births in the 18 months following its introduction. This accounts for around one-third of the overall decline in teen births in the United States during that period

Potential health impacts of heavy metals on HIV-infected population in USA.

Noninfectious comorbidities such as cardiovascular diseases have become increasingly prevalent and occur earlier in life in persons with HIV infection. Despite the emerging body of literature linking environmental exposures to chronic disease outcomes in the general population, the impacts of environmental exposures have received little attention in HIV-infected population. The aim of this study is to investigate whether individuals living with HIV have elevated prevalence of heavy metals compared to non-HIV infected individuals in United States. We used the National Health and Nutrition Examination Survey (NHANES) 2003-2010 to compare exposures to heavy metals including cadmium, lead, and total mercury in HIV infected and non-HIV infected subjects. In this cross-sectional study, we found that HIV-infected individuals had higher concentrations of all heavy metals than the non-HIV infected group. In a multivariate linear regression model, HIV status was significantly associated with increased blood cadmium (p=0.03) after adjusting for age, sex, race, education, poverty income ratio, and smoking. However, HIV status was not statistically associated with lead or mercury levels after adjusting for the same covariates. Our findings suggest that HIV-infected patients might be significantly more exposed to cadmium compared to non-HIV infected individuals which could contribute to higher prevalence of chronic diseases among HIV-infected subjects. Further research is warranted to identify sources of exposure and to understand more about specific health outcomes