Tract- and county-level income inequality and individual risk of obesity in the United States

ObjectivesWe tested three alternative hypotheses regarding the relationship between income inequality and individual risk of obesity at two geographical scales: U.S. Census tract and county.MethodsIncome inequality was measured by Gini coefficients, created from the 2000 U.S. Census. Obesity was clinically measured in the 2003–2008 National Health and Nutrition Examination Survey (NHANES). The individual measures and area measures were geo-linked to estimate three sets of multi-level models: tract only, county only, and tract and county simultaneously. Gender was tested as a moderator.ResultsAt both the tract and county levels, higher income inequality was associated with lower individual risk of obesity. The size of the coefficient was larger for county-level Gini than for tract-level Gini; and controlling income inequality at one level did not reduce the impact of income inequality at the other level. Gender was not a significant moderator for the obesity-income inequality association.ConclusionsHigher tract and county income inequality was associated with lower individual risk of obesity, indicating that at least at the tract and county levels and in the context of cross-sectional data, the public health goal of reducing the rate of obesity is in line with anti-poverty policies of addressing poverty through mixed-income development where neighborhood income inequality is likely higher than homogeneous neighborhoods.     

Economic deprivation and racial segregation: Comparing Superfund sites in Portland, Oregon and Detroit, Michigan

The research presented here weighs the ability of two major explanations of social inequality—Massey and Denton’s racial segregation explanation and Wilson’s emphasis on economic deprivation (concentrated poverty)—to predict environmental inequality. Two sets of logistic regression analyses are used to predict the location of Superfund sites in Portland, Oregon and Detroit, Michigan providing a conditional understanding of environmental inequality within a larger sociological context. The analysis includes a general examination of the two theories in all census tracts in both cities and a set of analyses focusing upon Black neighborhoods in Detroit. The findings indicate that there is support for explanations of environmental inequality that include both racial segregation and economic deprivation, but that the more powerful of the two is economic deprivation. The results suggest that even though African-American neighborhoods disproportionately house Superfund sites, these facilities are more likely to be located in Black neighborhoods that are economically deprived.     

中美贸易中的美方逆差是美方所期望的利益所在

因中美贸易的不平衡,使双方的贸易摩擦明显加剧,美方利用其巨额逆差想谋取更多的经济利益和政治利益。其实,美方的贸易逆差是美方所期望的利益所在,因为这有助于美国抑制通货膨胀、有助于美国的产业升级、有助于美国减缓资源耗竭速度和创造良好的生态环境以及有助于美国运用货币政策手段影响中国的政策。中方在获得经济利益的同时,也存在巨大的风险:对美国经济依赖程度提高、使环境污染加剧、使资源耗竭速度加快、使中国在国际政治舞台上难以摆脱美国的阴影、中国并没有得到预期想要的美国技术。要减少中方的贸易顺差,中方可采取如下策略:向美国出口的商品适当提价、提高出口产品技术含量和档次、提高外商投资的门槛、中国企业应积极去美国投资等。     

Spatial variation in poverty-generating processes: Child poverty in the United States

This study builds on research demonstrating that sub-regions within the United States have different processes that abet poverty and that child poverty is spatially differentiated. We focus on the social attributes of the local area to assess what the geographic place represents in terms of social characteristics, namely racial/ethnic composition and economic structure, and to resolve apparent inconsistencies in poverty research. Using spatial regime and spatial error regression techniques to analyze county census data, we examine spatial differentiation in the relationships that generate child poverty. Our approach addresses the conceptual and technical aspects of spatial inequality. Results show that local-area processes are at play with implications for more nuanced theoretical models and anti-poverty policies that consider systematic differences in factors contributing to child poverty according to the racial/ethnic and economic contexts.     

Non-intact families and diverging educational destinies: A decomposition analysis for Germany,Italy, the United Kingdom and the United States

We examine whether the presence of non-intact families in society is related to increased inequality in educational attainment according to social background, as suggested by the ‘diverging destinies’ thesis. We analyze four countries, Germany, Italy, the United Kingdom, and the United States, that differ in the prevalence of non-intact families and in the strength of the negative association between growing up in a non-intact family and children's educational attainment. We use a Blinder-Oaxaca decomposition approach to calculate a ‘counterfactual’ estimate of differences in educational attainment between socioeconomically advantaged and disadvantaged children in the hypothetical absence of non-intact families. Contrary to the diverging destinies thesis, we find little differences between actual and ‘counterfactual’ levels of inequality in educational attainment in all four countries. Whereas growing-up in a non-intact family affects the individual chances of educational attainment, the overall contribution of non-intact families to aggregate levels of social background inequality appears minimal.     

Investigating the organizational sources of high-wage earnings growth and rising inequality

Recent studies indicate that the growth of earnings inequality in the United States since the late 1970s reflects organizational changes in the process of earnings determination. Existing research primarily focuses on workplace changes that reduce earnings levels for middle- and low-wage workers despite the importance of high-wage gains for rising inequality. This paper investigates how organizational context affects the relationship between occupation and earnings, with a focus on high-wage occupations. The earnings associated with low-wage occupations do not vary across industry groups. By contrast, the earnings advantages associated with high-wage occupations vary across industry groups in relation to the industry’s prevalence of performance pay practices. Pay initiatives that reward individuals for company performance explain much of the inter-industry variance in managerial and professional earnings slopes. The growth of performance-based pay represents an organizational change in earnings determination that may serve as a mechanism of high-wage earnings growth and rising inequality.     

Emerging inequality in effort: A longitudinal investigation of parental involvement and early elementary school-aged children’s learning time in Japan

While studies on effort (e.g., Carbonaro, 2005; Kariya, 2000, 2013) have revealed relationships among students’ effort (e.g., self-reported learning time), socioeconomic status, and school-related factors (e.g., tracking) through secondary education data, whether and how the effort gap emerges and widens in the early years of compulsory education have not been researched. This study investigates the beginning of inequality in effort by using four waves (from first- to fourth-grade students) of the Longitudinal Survey of Babies in the 21st Century, collected in Japan. The results indicate that college-educated parents tend to employ parenting practices that directly and indirectly shape children’s learning time; inequality in effort exists, and it becomes exacerbated partly because of parenting differences in a society with a relatively equal elementary education system.     

Visible and invisible hands intertwined: State-market symbiotic interactions and changing income inequality in urban China

Analyzing the restructured political economy in 21st-century urban China, this project develops a “symbiotic interaction” model and reconceptualizes the state-market relationship to appreciate the changing inequality patterns. As the state and market have formed a long-term, intimate relationship, dynamic state policies interact with the fragmented labor market to redefine a set of socioeconomic capitals and statuses in affecting income inequality. Drawing empirical evidence from the Chinese General Social Survey 2003 and 2013 data, this paper employs linear and unconditional quantile regressions to compare income disparity patterns along both temporal and socio-spatial dimensions. The findings show that multiple key factors, including human capital (e.g., college education), political capital (e.g., party membership), occupational status (e.g., self-employment), and organizational type (e.g., state-owned enterprise), have all changed their economic returns over time and also played different roles for various earning groups. These findings suggest that we should conduct substantive institutional analyses of the evolving state-market relationship and their interplay to achieve a deeper understanding of the reshuffled stratification order in contemporary China. The proposed analytical framework also has broad implications in the research of other transitional economies.     

Using geographically weighted regression for environmental justice analysis: Cumulative cancer risks from air toxics in Florida

Previous quantitative research on environmental justice has been limited by simplistic assumptions used to measure health risks and traditional regression techniques that fail to discern spatial variations in statistical relationships. We address these gaps through a case study that examines: (a) whether potential health risks from exposure to hazardous air pollutants in Florida are related to race/ethnicity and socioeconomic status, and (b) how the significance of statistical associations between health risk and race/ethnicity or socioeconomic status vary across the state. This study integrates census tract level estimates of cumulative cancer risk compiled by the EPA with Census 2000 data and a spatial statistical technique known as geographically weighted regression that allows us to explore spatial variability in analytical results. Our findings indicate that while race and ethnicity are significantly related to cancer risks in Florida, conventional regression can hide important local variations in statistical relationships relevant to environmental justice analysis.     

Migration and metropolitan opportunity structures: A demographic response to racial inequality

This paper examines the impact of racial inequality on black and white migration rates for a sample of metropolitan areas in the United States 1975–1980. A conceptual framework for migration that includes a measure of racial inequality is developed and evaluated. The results indicate that blacks are attracted to areas with lower levels of inequality, but contrary to our expectations, the rate of black out-migration is lower in Standard Metropolitan Statistical Areas with higher levels of racial inequality. In addition, whites seem to be attracted to labor markets where whites have the greatest advantage as measured by occupational inequality, and they are more likely to leave areas where the competition with blacks for jobs is greater. Implications for theory and further research for the comparative study of black and white migration are outlined.     

A dynamic macro social indicator model of changes in marriage, family, and population in the United States: 1947–1974

This paper presents an integrated 21-equation model of how marriage, family, and population conditions, as indexed by macro social indicators, affect each other and are affected by other social, demographic, and economic forces. An opportunity structures theoretical paradigm is applied to the specification of dynamic structural equations for determining changes (both trends and cyclical fluctuations) in marriage formation and dissolution, family and household composition, fertility, mortality, population growth, and population distribution. The equations are estimated on annual national data for the United States during the post-World War II years 1947 to 1972, and then they are used to make conditional forecasts of the values of some of the endogenous variables for 1973 and 1974. It is found that the equations fit the observed data well, lack demonstrable autocorrelation of disturbances, and forecast the 1973 and 1974 values usually with less than 2% error. Strategies are sketched for further refining some of the equations, and it is suggested that this model should be integrated into a larger societal model in order to estimate some of the effects of changes in demographic phenomena on other social conditions.     

American crime drops: Investigating the breaks,dips and drops in temporal homicide

ObjectivesWhile a great deal of attention has been given to the 1990s crime drop, less is known about the more recent decline in homicide rates that occurred in several large U.S. cities. This paper aims to explore whether these represent two distinct drops via statistical evidence of structural breaks in longitudinal homicide trends and explore potentially differing explanations for the two declines. Methods: Using homicide data on a large sample of U.S. cities from 1990 to 2011, we test for structural breaks in temporal homicide rates. Combining census data and a time series approach, we also examine the role structural features, demographic shifts, and crime control strategies played in the changes in homicide rates over time. Results: Statistical evidence demonstrates two structural breaks in homicide trends, with one trend reflecting the 1990s crime drop (1994–2002) and another trend capturing a second decline (2007–2011). Time series analysis confirms previous research findings about the contributions of structural conditions (e.g., disadvantage) and crime control strategies (e.g., police force size) to the crime drop of the 1990s, but these factors cannot account for the more recent drop with the exception of police presence. Conclusions: Although both structural conditions and crime control strategies are critical to the longitudinal trends in homicide rates over the entire span from 1990 to 2011, different factors account for these two distinct temporal trends.     

Social network characteristics and risky sexual and drug related behaviors among homeless young adults

Although research finds high rates of risky sexual and drug related behavior among homeless young people, little research had examined how the characteristics of their social networks encourage or constrain risky behaviors. Based on a sample of 145 homeless young adults in the Midwestern United States, results revealed that having used alcohol with at least one of their network members and the presence of more conflict was associated with engaging in a greater number of sexual risk taking behaviors. Correlates of engaging in a greater number of substance use related behaviors included having older peers within the network, having used illicit drugs with at least one network member, and the presence of more conflict. The presence of a family member in one’s network, however, was associated with fewer sexual and drug related risk behaviors. Overall, the social network characteristics of youth explained significant, additional variance beyond that of youth’s own characteristics and their early family histories.     

Urban density and the metabolic reach of metropolitan areas: A panel analysis of per capita transportation emissions at the county-level

We engage a tension in the urban environment literature that positions cities as both drivers of environmental destruction and loci of environmental protection. We argue that the traditional binary view of cities as either harmful or beneficial is too simplistic; we advance a more nuanced understanding of cities to study their internal and external metabolic effects in terms of carbon emissions from on-road transportation at the county-level across the continental United States between 2002 and 2007. First, utilizing satellite imagery from the National Land Cover Database, we create a novel measure of population density by quantifying the number of people per square mile of impervious surface area. Second, we develop a measure of metropolitan adjacency from the rural classifications datasets published by the USDA. In spatial regression models, we find that while higher density reduces emissions, counties that are geographically isolated from metropolitan areas actually have lower per capita emissions, all else equal. We elaborate on the conceptual, methodological, and practical implications of our study in the conclusion.     

Compensating differentials, labor market segmentation, and wage inequality

Two literatures on work and the labor market draw attention to the importance of non-pecuniary job amenities. Social psychological perspectives on work suggest that workers have preferences for a range of job amenities (e.g. Halaby, 2003). The compensating differentials hypothesis predicts that workers navigate tradeoffs among different job amenities such that wage inequality overstates inequality in utility (Smith, 1979). This paper joins these perspectives by constructing a new measure of labor market success that evaluates the degree to which workers’ job amenity preferences and outcomes match. This measure of subjective success is used to predict workers’ job satisfaction and to test the hypothesis that some degree of labor force inequality in wages is due to preference-based tradeoffs among all job amenities. Findings demonstrate that the new measure predicts workers’ job satisfaction and provides evidence for the presence of compensating differentials in the primary and intermediate, but not secondary, labor markets.     

The impact of suspension on participation in school-based extracurricular activities and out-of-school community service

In recent decades, school suspensions have increased dramatically in the United States. To date, researchers have assessed the consequences of suspensions on adolescents' academic achievement, self-esteem, and psychological well-being. However, few studies have investigated the relationship between school discipline and youths' engagement on in-school and out-of-school activities. In this study, we investigate the relationship between suspension (i.e., in-school suspension, out-of-school suspension, or both) and youth participation in extracurricular activities, both in-school and outside of school, using data from the Educational Longitudinal Study of 2002. Results suggest students who are suspended are less likely to participate in school clubs (e.g., student government, yearbook, band/choir), and are also less likely to participate in volunteer work/community service. This suggests the impact of school discipline extends beyond the schooling context. These results provide insight into how suspensions may function as a ‘pushout’ mechanism for youth by compromising their attachment to school.     

The healthy immigrant (migrant) effect: In search of a better native-born comparison group

This paper evaluates whether immigrants’ initial health advantage over their U.S.-born counterparts results primarily from characteristics correlated with their birth countries (e.g., immigrant culture) or from selective migration (e.g., unobserved characteristics such as motivation and ambition) by comparing recent immigrants’ health to that of recent U.S.-born interstate migrants (“U.S.-born movers”). Using data from the 1999–2013 waves of the March Current Population Survey, I find that, relative to U.S.-born adults (collectively), recent immigrants have a 6.1 percentage point lower probability of reporting their health as fair or poor. Changing the reference group to U.S.-born movers, however, reduces the recent immigrant health advantage by 28%. Similar reductions in the immigrant health advantage occurs in models estimated separately by either race/ethnicity or education level. Models that examine health differences between recent immigrants and U.S.-born movers who both moved for a new job—a primary motivation behind moving for both immigrants and the U.S.-born—show that such immigrants have only a 1.9 percentage point lower probability of reporting their health as fair or poor. Together, the findings suggest that changing the reference group from U.S.-born adults collectively to U.S.-born movers reduces the identified immigrant health advantage, indicating that selective migration plays a significant role in explaining the initial health advantage of immigrants in the United States.     

新经济广义论

新经济发源于美国，盛行于美国，研究时也自然离不开美国，但最终的焦点却不应该是美国，而是其能给我国带来什么好处。另外，新经济的产生与发展的源动力--计算机网络技术作为一个重要的产业往往被人们所重视，可其同其他新技术融合一体对经济的推动作用却往往被人们所忽视，等等一些问题都要求我们改变思维，用广义的方法去研究探讨。     

略述中美对峙时期美国中国学家的活动及其影响

在中关隔绝对峙时期,美国中国学家或专注中国研究,以认识和理解共产主义中国;或就中关关系问题为政府出谋划策,以使政府制定符合现实的对华政策;或致力于公众的中国知识教育,加深公众对中国的了解,消除他们对中国不必要的恐惧和敌视。     

美国非政府环保组织的作用及借鉴研究

美国的疆域和中国大体相当,它的经济发展历程以及与之伴随出现的环境污染也与当代中国极其相似,但是美国面对环境问题日益严重而兴起和发展起来的众多的环保组织却是中国所缺乏的。美国非政府环保组织从最初的保护单一物种、保护单一的区域资源的组织,现在已经发展为保护美国甚至整个地球自然资源的全国性或全球性的组织,成为数量众多,影响巨大的环境利益团体,它在保护自然资源,影响美国环境政策的制定,提高国民的环保意识等方面发挥重要作用。在环境问题和资源保护问题全球化的今天,包括中国在内的发展中国家在发展经济的同时,吸收美国环保组织的经验教训,无疑具有重要的意义。