The existence of large, relatively comfortable, middle and working classes is what has set the advanced capitalist societies apart from most societies throughout history. These classes, while not quite "privileged," offer the hope of opportunity and upward social mobility for those who work hard. Yet in the last 30 years a growing class of "working poor" has emerged who invest many hours working but at wages that keep upward social mobility beyond their grasp. The existence of the working poor, it seems, dispels a key element in the ideology of individualism; they work hard yet do not "get ahead." This study addresses the contradiction presented by the working poor; specifically, do the working poor support the ideology of individualism? Prior research finds that the disadvantaged justify the system that inhibits them from having a better quality of life (Jost, et al. 2003). This study, however, suggests that the working poor are more conscious of the ideology's failure to explain their lack of mobility in a system that promises opportunity to those who work hard. Research data were generated through the use of telephone surveys in five counties in Central Florida with approximately 1571 respondents. Several measures of "working poor" were created; moreover, respondents within these categories tended to disagree with the "work hard, get ahead" ideology. Respondents who viewed their financial situation as getting worse, unable to grasp the "upward mobility" promise of the American Dream, also significantly disagreed with the ideology.

Segregation has many negative consequences for marginalized populations, including poor health, increased poverty, low-quality housing, and limited education and employment opportunities. Scholars have recently recognized access to food as another piece of this “advanced marginality.” This study illuminates how lagging food and transportation infrastructures exacerbates these interlocking inequalities and whether new ride-hail technologies' promise that ride-hail services like Uber and Lyft will help affected populations access food stores with lower prices and higher food quality. As a descriptive understanding of the intersection between food, transportation, and racial residential segregation in Chicago, Illinois, this study analyzes two questions: (1) how often are ride-hail trips crossing food desert census tract boundaries; and (2) are ride-hail trips that cross food desert census tract boundaries accessing food stores? Using spatial analyses of the City of Chicago’s ride-hail transportation data, food store location data, American Community Survey data, and USDA food desert classification data, this study finds that ride-hail services are accessing food desert neighborhoods, but they are doing so at a very low rate, and very few ride-hail rides are used to access food stores after departing from food desert neighborhoods.

Recently, the issue of poverty amongst indigenous people has become a significant topic in literature on social policy and development studies. The literature mainly looks at this issue in terms of an unequal and one-sided relationship between the mainstream society and an indigenous minority group. This thesis seeks insights into the more diversified circumstances and experiences of poverty amongst indigenous people. The following questions are addressed: (1) Why and how is the poverty of indigenous people reproduced over time and space? (2) How can we understand patterns of differentiation between indigenous people? (3) What is the balance between structural opportunity and constraint in the lives of indigenous people? (4) To what extent do people exercise agency to cope with or overcome their poverty situations? The thesis adopts an ethnographic approach, including participant observation and interviews in four villages of Taiwanese indigenous people. It explores the connections between poverty dynamics and diversified patterns of socio-economic action amongst indigenous people. Hogget and Greener¿s model of agency, which contains the essential theoretical views of Giddens (the ability of agents to act) and Bourdieu (the embedded corporeal disposition of human agents) are used to make sense of this exploration. The thesis finds that the actions of indigenous people as human agents are differentiated. Actions are not only motivated by strategic plans and emotions but are also influenced by the agents¿ socio-economic positions, such as their occupations and education and those of their parents. The differentiated socio-economic activities of agents, in turn, have a strong effect on the stratification of their living standards. / World Bank.

<p>This study combines longitudinal and cohort analyses to provide an extensive examination of the nature of postsecondary stratification among Canadian and American universities and students in this era of unprecedented postsecondary expansion, institutional diversification, and rising competition for external research funding. Multiple statistical methods and a range of data sources are employed to analyse new and increasingly important forms of stratification at two levels of analysis: the structural (i.e., universities) and the individual (i.e., students). At the structural level, the results demonstrate that both nations have become more stratified over time. The extent of institutional stratification and rate of growth, however, is much higher in the U.S. At the top end of the U.S. hierarchy, a few '"elite" and larger institutions appear to be winning the majority of contests for economic resources and other independent sources of revenue. In Canada, universities changed only slightly over the span of thirty years, though there is some evidence of mild convergence across nations, particularly in areas where government regulation has become more variable (e.g., endowments, tuitions). At the individual level, even though a wider variety of students from varied social backgrounds are entering into higher education, the analyses reveal a significant degree of inequality in both Canada and the United States. Consistent with existing research, gender remains an important and consistent predictor of school and field of study choices. These educational decisions were also influenced by family background effects, as both parental education and SES exhibited positive and strong influences on institutional selectivity decisions across two U.S. cohorts. For field of study choices, moderate family background effects, strong and consistent academic ability effects and growing academic aspiration effects were found across most analyses, lending support to theories that predict family background has direct and indirect effects on higher education choices. </p> / Thesis / Doctor of Philosophy (PhD)

In clinical trials, placebo response is considered a beneficial effect arising from multiple factors, including the patient’s expectations for the treatment. Due to the presence of placebo response, the classical parallel design often fails to declare an efficacious treatment. The Sequential Parallel Comparison Design (SPCD), a two-stage design where the first stage is a classical parallel trial, followed by another parallel trial among placebo patients from the first stage, was proposed to mitigate the placebo response. In SPCD, in lieu of treatment effect, a weighted average of the mean treatment difference in Stage I among all randomized patients and the mean treatment difference in Stage II among placebo non-responders was proposed as the efficacy measure. However, by mixing two possibly different populations, this weighted average lacks interpretability, the choice of weight remains controversial, and the classification of patients into placebo responders and non-responders via hard criterion-based rule warrants careful consideration. In this work, we first elaborate and study the shortcomings surrounding this efficacy measure, which motivates us to propose causal estimands for clinically meaningful principal strata under the principal stratification framework. To make the estimands identifiable, we invoke a set of assumptions and introduce two sensitivity parameters. Meanwhile, in the absence of a clinically proven criterion for classifying responders and non-responders, we additionally suggest estimating the response status and sensitivity parameters via the Expectation-Maximization (EM) algorithm by treating the principal strata as full latent characteristics. Next, we further refine and alternatively propose a more consistent and sophisticated EM procedure for classification, point estimation, and hypothesis testing. Finally, we evaluate our methods with extensive simulation studies and apply them to an actual SPCD study of antidepressant therapy to assess the benefit of low-dose aripiprazole adjunctive to antidepressant therapy treatment, the ADAPT-A trial. In conclusion, we believe this is an important step toward a more rigorous and transparent approach to evaluating the treatment benefit in the presence of placebo response. / 2025-09-18T00:00:00Z

The dissertation explores recent trends in educational assortative mating in Western countries. In particular, the rise of hypogamy is analyzed, focusing on its causes and consequences. The dissertation aims at providing new evidence on issues concerning the rise of hypogamy at the individual level. As for its causes, changes in the partner market composition are analyzed in a life course perspective as a possible driver of hypogamy, underlining the dynamic nature of its role during the partner search. Moreover, elements from the social psychology field such as the activation of behaviors to find a partner are analyzed. Finally, the dissertation studies how partner choice shapes processes of social reproduction, and in particular educational reproduction. A penalty for hypogamy is found among higher educated women, but it does not persist across generations. The dissertation provides two main contributions to the literature. First, it provides evidence of the relevance of adopting a life-course approach when looking at dynamics of union formation, and in particular hypogamy. Second, it provides evidence of the importance of partner choice for social reproduction processes, especially among women.

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