The Role of Time Use Behaviors in the Risk of Obesity among Low-Income Mothers.

OBJECTIVES: Childrearing responsibilities create additional demands on women's time and effort, especially in low-income families. We explore whether childrearing demands and differences in time use increase the risk of overweight and obesity for women in different income brackets. METHODS: We use data for women ages 18-55 years from the 2006-2008 and 2014-2015 American Time Use Surveys (N = 17,914). We predict whether women engage in particular activities using logistic regression and, among those who do particular activities, we predict the minutes spent in various activities using ordinary least squares models. We also predict women's risk of overweight or obesity using logistic regression. All models examine conditional relationships between income level and motherhood status. RESULTS: Replicating prior research, we find a greater risk of overweight and obesity for mothers with low (odds ratio, 1.66; p < .001) and subpoverty (odds ratio, 1.93; p < .001) incomes compared with mothers with moderate/upper incomes and all child-free women. Motherhood and income status jointly predict women's time use, but including these time use behaviors in models of overweight and obesity does not attenuate the significantly higher risks for mothers with low and subpoverty incomes. CONCLUSIONS: Mothers experiencing economic hardship are at greater risk of overweight and obesity relative to other women. Additional research is warranted, however, because differences in time use do not explain this important health disparity.

Accelerated Aging: The Role of Socioeconomic, Social, Demographic, and Biological Factors on Bone Mineral Density.

We investigate socioeconomic, social, demographic, and biological variables that are associated with chronic stress in the body to assess whether they have an effect on bone mineral density (BMD) as an indicator of accelerated aging. Multiple regression models were derived from data in the Midlife in the United States: A National Longitudinal Study of Health and Well-Being, Waves 1 (1995-1996) and 2 (2004-2006). Three BMD variables were used as outcomes: femoral, femoral neck, and spine T scores. The sample included 333 men and women aged 34-80. Poverty and C-reactive protein were related to BMD for spine T scores, partially consistent with hypotheses. But, marital status, perceived support of a partner, and education were not associated. Friend strain was discovered to have a relationship with BMD. More variables, and from a broader context, need to be examined together to understand what affects reduced BMD, given the high costs of accelerated aging.

A multifaceted analysis of social stressors and chronic inflammation.

Chronic stress has been linked to negative health outcomes, including increased inflammation, which can be measured by high-sensitivity C-reactive protein (CRP). Prior research has focused almost exclusively on relationships between individual social and demographic stressors and CRP. The objective of this study is to assess the role of multiple potential stressors simultaneously to determine which key stressors are related to risk of high CRP, given that sustained stress and resulting inflammation may have long-term health implications. We hypothesized that negative social and environmental factors would be associated with high CRP. Data from two waves of Midlife in the United States were used to predict high CRP with variable selection procedures and logistic regression. Results indicated females, those with greater BMI, those with improvements in family strain, and those with higher A1c had a greater risk of high CRP. There was limited evidence that negative social factors were associated with CRP to the extent seen in prior literature. A key advantage of the study was testing multiple potential determinants of chronic stress and inflammation simultaneously, advancing the existing literature. Results demonstrate the potential usefulness of a multifaceted approach to evaluating the risk of chronic inflammation and high CRP.

A couple-level analysis of participation in physical activity during unemployment.

There is a well-documented negative correlation between unemployment and health. Yet, little research has examined how unemployment relates to participation in physical activity, and few researchers have considered how an individual's unemployment may affect the health of their spouse or partner. The purpose of this study is to answer three questions: 1. Is one's own unemployment associated with changes in physical activity participation? 2. Is one's partner's unemployment associated with changes in physical activity participation? 3. Do changes in physical activity behaviors associated with unemployment differ by gender? This study uses nationally representative, longitudinal data on couples in the United States, covering the period 1999-2013. These data, obtained from the Panel Study of Income Dynamics, are used to estimate fixed-effects models of the relationships between one's own, and one's partner's, unemployment and participation in physical activity. I find that for men unemployment is not associated with changes in physical activity time. For women, own unemployment is associated with increases in physical activity, whereas a partner's unemployment is associated with decreases in physical activity. I argue that unemployed women, unlike men, are able to take advantage of the increased availability of time through reduced labor supply to invest in their health during unemployment, which could have positive long-run consequences. Results suggest the importance of studying unemployment and health at the household level and suggest a need for further investigation into gender differences in unemployment and health.

Does Specialization Explain Marriage Penalties and Premiums?

Married men's wage premium is often attributed to within-household specialization: men can devote more effort to wage-earning when their wives assume responsibility for household labor. We provide a comprehensive evaluation of the specialization hypothesis, arguing that, if specialization causes the male marriage premium, married women should experience wage losses. Furthermore, specialization by married parents should augment the motherhood penalty and the fatherhood premium for married as compared to unmarried parents. Using fixed-effects models and data from the NLSY79, we estimate within-gender differences in wages according to marital status and between-gender differences in the associations between marital status and wages. We then test whether specialization on time use, job traits, and tenure accounts for the observed associations. Results for women do not support the specialization hypothesis. Childless men and women both receive a marriage premium. Marriage augments the fatherhood premium but not the motherhood penalty. Changes in own and spousal employment hours, job traits, and tenure appear to benefit both married men and women, although men benefit more. Marriage changes men's labor market behavior in ways that augment wages, but these changes do not appear to occur at the expense of women's wages.

Unemployment in Families: The Case of Housework.

Unemployment has consequences for individuals, but its impacts also reverberate through families. This paper examines how families adapt to unemployment in one area of life-time in housework. Using 74,881 observations from 10,390 couples in the Panel Study of Income Dynamics, we estimate fixed effects models and find that individuals spend between 3 and 7 hours more per week in housework when unemployed than when employed, with corresponding decreases of 1 to 2 hours per week in the housework hours of unemployed individuals' spouses. We are the first to show that unemployment is associated both with a reallocation of housework to the unemployed spouse and an increase in the family's total household production time. The results also provide evidence for gender differences in adjustments to the division of labor during unemployment, with wives' unemployment associated with an increase in housework hours that is double the increase for unemployed husbands.

Ethnic enclaves and the earnings of immigrants.

A large literature in sociology concerns the implications of immigrants' participation in ethnic enclaves for their economic and social well-being. The "enclave thesis" speculates that immigrants benefit from working in ethnic enclaves. Previous research concerning the effects of enclave participation on immigrants' economic outcomes has come to mixed conclusions as to whether enclave effects are positive or negative. In this article, we seek to extend and improve upon past work by formulating testable hypotheses based on the enclave thesis and testing them with data from the 2003 New Immigrant Survey (NIS), employing both residence-based and workplace-based measures of the ethnic enclave. We compare the economic outcomes of immigrants working in ethnic enclaves with those of immigrants working in the mainstream economy. Our research yields minimal support for the enclave thesis. Our results further indicate that for some immigrant groups, ethnic enclave participation actually has a negative effect on economic outcomes.

Money Isn't Everything: Wives' Earnings and Housework Time.

The autonomy perspective of housework time predicts that wives' housework time falls steadily as their earnings rise, because wives use additional financial resources to outsource or forego time in housework. We argue, however, that wives' ability to reduce their housework varies by household task. That is, we expect that increases in wives' earnings will allow them to forego or outsource some tasks, but not others. As a result, we hypothesize more rapid declines in wives' housework time for low-earning wives as their earnings increase than for high-earning wives who have already stopped performing household tasks that are the easiest and cheapest to outsource or forego. Using fixed-effects models and data from the Panel Study of Income Dynamics, we find considerable support for our hypothesis. We further conclude that past evidence that wives who out-earn their husbands spend additional time in housework to compensate for their gender-deviant success in the labor market is due to the failure to account for the non-linear relationship between wives' absolute earnings and their housework time.