Browsing by Subject "demography"
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Item A Classic Model in a Low Fertility Context: The Proximate Determinants of Fertility in South Korea and the United States(2011-08-08) Guarneri, Christine E.John Bongaarts' proximate determinants model of fertility has accounted for over 90 percent of variation in the total fertility rate (TFR) of primarily developing nations and historical populations. Recently, dramatically low fertility rates across the globe have raised questions regarding whether this model could be applied to exclusively below-replacement nations. This study follows Knodel, Chamratrithirong, and Debavalya's 1987 analysis of fertility decline in Thailand by conducting in-depth case studies of the proximate determinants in two low fertility countries over time: South Korea, where fertility is well below the level of replacement, and the United States, where fertility has hovered around replacement level for many years. Then, the fertility-inhibiting effect of the proximate determinants is assessed by comparing the quantitative index representing each determinant measured in the 1960s/1970s with its measurement in the 2000s. For both years, I consider the fertility level that would prevail in the determinant's presence as well as the level that would exist in its absence. Finally, I use each of the indices to calculate the TFR and assess how the strength of the model varies over time in the two countries. Ultimately, results indicate that the proximate determinants model does not offer a clean picture of the fertility level in either South Korea or the United States; when trends uncovered by the case studies are compared to the results of the quantitative analysis, a number of inconsistencies are revealed. This suggests that certain components in the model may need to be respecified for more effective application in low-fertility contexts. However, that is not to say that it offers no insight into fertility at all or that it is no longer a useful tool. On the contrary, it is shown that the proximate determinants model holds a lot of potential for analysis in low-fertility nations. The implications of these results, as well as the need for improvements in international data collection efforts, are also discussed.Item Mexican-Origin Interregional Migration from the Southwest: Human, Household, and Community Capital Hypotheses(2010-01-16) Siordia, CarlosThis research addresses the question of what factors lead Mexican-origin individuals living in the U.S. to seek a new residence outside their Southwestern state of residence. The analysis examines three hypotheses: (1) the human capital hypothesis that college graduates have higher odds of migrating out of the core region than those with less than a high school education; (2) the household social capital hypothesis that posits that the presence of a household member born outside the core increases the odds of migration; and (3) the community social capital hypothesis which states that householders residing in an area with community social capital will have higher odds of leaving the core than those living in areas with no community social capital. These hypotheses are investigated using three models: (1) a full model that includes both native- and foreign-born Mexican-origin householders; (2) a native-born model which includes only native-born Southwest householders; and (3) a foreign-born models that includes only foreign-born Mexican-origin householders. By using the Saenzian region-concepts of core, periphery, and frontier, I find: (1) limited support for the human capital hypothesis; (2) consistent support for the household social capital; and (3) no support for the community social capital. The analysis is important to sociological theory and demography because it specifically endeavors to explain how the connections between three kinds of capital?human, household, and community?shape the decision to leave the Southwest for other regions of the country. By computing statistical and theoretical particulars, the thesis ascertains that migration-selectivity theories regarding the general population are useful in theorizing Mexican-origin interregional migration. Findings expand existing sociological literature by theorizing how human, household, and community capital operate under the Saenzian regions to shape the interregional migration of the growing Mexican-origin population of the U.S.Item Predictors of the likelihood of adoption among U.S. women by race and ethnicity(2009-05-15) Klucsarits, Christine ElizabethThis thesis utilizes a series of seven logistic regression models to examine the predictors of the likelihood of adoption among U.S. women based on the National Survey of Family Growth, Cycle 6. The individual characteristics that have been found most influential in determining adoption behavior in past studies were examined, including age at the time of the interview, parity, fecundity status, and socioeconomic status. A special focus was placed upon the relationship between the race and ethnicity of a woman and her adoption behavior, which has received limited attention in the adoption literature. The results of this analysis suggest that the main determinants of adoption are undergoing change. While findings on the relationship between a woman?s age and her likelihood of adoption are consistent with past research, the relationships of parity, marital status, fecundity status and socioeconomic status with adoption behavior each exhibit surprising developments. Additionally, the results of this analysis reveal that race and ethnicity are important variables in terms of the adoption behavior of U.S. women. The implications of these results, as well as the need for more comprehensive adoption data, are also discussed.Item Situating Male Fertility: A Demographic Analysis of Male and Female Fertility in the United States(2012-02-14) Cherry, Robert ChristopherIn this dissertation I investigate whether or not a series of social, demographic, and cultural factors affect fertility differently, in either direction or magnitude, for men and women. This work situates the study of male fertility within the existing demographic literature, models and compares male and female fertility through the use of a variety of dependent and independent variables, discovers which of those variables reveal a difference between the determinants of male and female fertility, and extends understanding of how male fertility should be studied in addition to and alongside female fertility. Although there is a significant literature on the biological and anatomic components of male fertility, there is little work published on the social and cultural factors that affect male fertility. Comparisons of male and female fertility are also lacking within the discipline of demography. The National Survey of Family Growth (Cycle 7) provides survey data on both men and women on a number of social, cultural, and demographic variables used either on their own, or as components in the construction of indicator variables. I present the results of models utilizing both direct and indirect measures of fertility. Three models are direct measures of fertility, and three other indirect models examine behaviors as a measure of exposure to the risk of fertility. Only four of these models were significant under the initial analysis. Within each of the models, the respondent?s age, poverty level, age at first intercourse, and whether the respondent ever married or cohabited presented the most frequent differences, in either direction, magnitude, or both, between males and females. I discuss the implications of the findings presented in the dissertation, as well as the potential for future research using other data or methods.Item The Effects of Woody Plant Management on Habitat Conditions, Plant Demography, and Transplantation Success of the Endangered Orchid Spiranthes parksii Correll(2014-05-09) Bruton, Richard KyleSpiranthes parksii Correll is a federally endangered species endemic to 13 counties of the Post Oak Savanna in Central Texas. Approximately 700 S. parksii are located on the Brazos Valley Solid Waste Management Agency?s (BVSWMA) Twin Oaks landfill property in Grimes County, Texas. The opportunity to study S. parksii was created through the mitigation requirements set forth by the United States Fish and Wildlife Service (USFWS) on the property. Studies were designed to assess the effect of woody plant management on the target species with the overall goal of enhancing the establishment, growth, and reproductive success of S. parksii. Evergreen midstory shrub removal and woody patch clearing to produce varying sized open grassland and woody patches to increase edge effect were studied to determine their influence on habitat for S. parksii. S. parksii were transplanted from at risk areas to permanently protected areas to evaluate potential effective procedures for transplanting of the species. Seasonal variability in S. parksii and Spiranthes spp. numbers were common across all studies, however, flower production in the fall was positively correlated with the summed January through March precipitation. In general, the removal of encroached woody plants resulted in a positive orchid response, though poor herbicide efficacy may limit this treatment effect in the long-term. Transplantation of S. parksii into areas which received woody plant management resulted in at least a 50% survival rate 3 years post-transplant.Item The incidence of death among low-risk populations: a multi-level analysis(Texas A&M University, 2007-09-17) Lewinski, Christi NicoleThis study utilized a multi-level model to examine the impact of religion as an occupation on mortality. Death certificate data were used to examine clergy mortality and compares them to census categorized professionals, counseling professionals and unmarried clergy. Individuals mortality exist in, and is influenced by the state they resided and died in. Because of this, they are not only examined on the individual level, they are also nested in their respective state of death. A series of hierarchical linear models were estimated in order to determine the effects of the different influence levels (individual and state). Findings suggest that clergy have a significant life advantage over professionals and counseling professionals. Married clergy have significant years of life disadvantage when compared to unmarried clergy. Implications of this research are discussed and considerations for future research are presented.Item The Political-Economic and Demographic Causes of Metropolitan Income Inequality and Its Components(2010-07-14) Chen, XIThis research project examines variations in inequality in individual earned incomes across U.S. metropolitan areas. The main analysis includes thirteen explanatory variables from three major perspectives - the political economy perspective, the demand-side perspective and the labor force supply-side perspective. In addition, I applied path models to explain causalities between some independent variables and used the decomposition of the Theil index to show the between-group effects. The results indicate that most demand-side and supply-side factors significantly contribute to variances in metropolitan income inequalities, while the impact of political economic factors are very limited. The paper is organized in the following manner: Chapter I is the introduction; Chapter II reviews literature focusing on the level of earning inequality and its predictors; Chapter III describes data and measures of variables; Chapter IV introduces statistical methods (including OLS regression model, path analysis, and decomposition of the Theil index); Chapter V presents the results of OLS regression model and its explanations; Chapter VI explains path analysis and decomposition analysis and their results; and finally, Chapter VII discusses the current research project and its implications for future studies.