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本論文從兩個方面研究了1996年美國福利制度改革對單身母親的影響。首先，本文研究了在SSI和AFDC/TANF兩個政府福利計劃之間是否存在替代效應。其次，本文研究了福利制度改革是否令到更多的單身母親變得邊緣化(沒有參與工作亦沒有領取政府福利)，以及研究她們的長期生活情況。利用美國三個具代表性的調查數據庫, difference-in-difference分析以及logistic回歸分析方法，本文有以下四點結論:（一）SSI和AFDC計劃之間並不存在替代效應；（二）對AFDC/TANF計劃實行五年的領取期限令到部分單身母親變得邊緣化；（三）在年福利改革之後，被邊緣化的單身母親在食物消費上並沒有發生太大的變化；（四）被邊緣化的單身母親傾向將她們多餘的時間分配在個人娛樂方面而不是在家務和照顧小孩上面。雖然年的福利改革成功地減少了領取/計劃的人數，但政策制定者仍需注意改革令到更多的單身母親變得邊緣化，同時應制定相關政策來幫助她們。 / This paper studies the effect of the 1996 welfare reform on single mothers, focusing on two important aspects. First, it examines the existence of programme substitution between SSI and former AFDC/TANF recipients after the reform. Second, it examines the prevalence of single mothers who were disconnected from government assistance and the job market since the reform and evaluates their long-term well-being. Using three major nationally representative surveys, difference-in-difference analysis, and logistic regression models, I arrive at four main findings. First, I find no evidence of a programme substitution effect between AFDC/TANF and SSI. Second, the five-year time limit policy is suggested as being responsible for part of the increase in the disconnected rate among single mothers. Third, disconnected single mothers did not face a food insecurity problem after welfare reform. Fourth, disconnected single mothers allocate much more time to personal entertainment than to productive activities such as housework and child care. While the 1996 welfare reform has succeeded in reducing AFDC/TANF caseloads, policy makers should pay attention to its effects on the disconnectedness of single mothers and help such women leave their disconnected status. / Detailed summary in vernacular field only. / Hoi, Kam Un. / Thesis (M.Phil.)--Chinese University of Hong Kong, 2012. / Includes bibliographical references (leaves 59-62). / Abstracts also in Chinese. / Abstract --- p.ii / 摘要 --- p.iii / Acknowledgements --- p.iv / Chapter 1 --- Introduction --- p.1 / Chapter 2 --- The AFDC Programme and the 1996 Welfare Reform --- p.3 / Chapter 3 --- Literature Review --- p.5 / Chapter 3.1 --- Employment of single mothers --- p.5 / Chapter 3.2 --- Welfare programme substitution --- p.6 / Chapter 3.3 --- Disconnectedness --- p.9 / Chapter 4 --- Data and Methodology --- p.13 / Chapter 4.1 --- Data sources and description --- p.13 / Chapter 4.2 --- DID analysis --- p.14 / Chapter 4.3 --- Logistic regression methodology --- p.15 / Chapter 5 --- Existence of programme substitution --- p.18 / Chapter 6 --- Change in the number of disconnected single mothers --- p.19 / Chapter 6.1 --- A national picture of single mothers --- p.19 / Chapter 6.2 --- Empirical results --- p.21 / Chapter 6.3 --- Why black single mothers are less likely to be disconnected --- p.22 / Chapter 6.4 --- The separate effects of time limit policy on disconnectedness --- p.23 / Chapter 7 --- Change in the well-being of disconnected single mothers --- p.24 / Chapter 7.1 --- Food consumption --- p.24 / Chapter 7.2 --- Time allocation --- p.26 / Chapter 8 --- Discussion and Policy Implications --- p.29 / Chapter 9 --- Conclusion --- p.31

He, Xiaoyue. / "July 2011." / Thesis (M.Phil.)--Chinese University of Hong Kong, 2011. / Includes bibliographical references. / Abstracts in English and Chinese. / Chapter 1. --- Introduction --- p.1 / Chapter 1.1. --- Background --- p.1 / Chapter 1.2. --- Theoretical Model --- p.4 / Chapter 2. --- Literature Review --- p.7 / Chapter 3. --- Data and Methodology --- p.12 / Chapter 3.1. --- Data --- p.12 / Chapter 3.2. --- Methodology --- p.13 / Chapter 3.3. --- Definition of Key Variables --- p.14 / Chapter 4. --- Descriptive Results of DID Analysis --- p.15 / Chapter 5. --- Regression Approach --- p.20 / Chapter 6. --- Time Allocation of Single Mothers of Differing Education Levels --- p.25 / Chapter 7. --- Changes in Leisure Inequality Among Single Mothers --- p.31 / Chapter 8. --- Single Mothers by Demographic Characteristics --- p.33 / Chapter 8.1. --- Single Mothers by Race --- p.33 / Chapter 8.2. --- Single Mothers by Age --- p.35 / Chapter 9. --- Discussion and Policy Implications --- p.36 / Chapter 10. --- Conclusion and Directions for Further Research --- p.39 / Tables and Figures --- p.42 / Appendices --- p.62 / References --- p.82