排序方式: 共有35条查询结果,搜索用时 0 毫秒
1.
Heeju Sohn 《Population research and policy review》2017,36(2):181-201
Health insurance coverage varies substantially between racial and ethnic groups in the United States. Compared to non-Hispanic whites, African Americans and people of Hispanic origin had persistently lower insurance coverage rates at all ages. This article describes age- and group-specific dynamics of insurance gain and loss that contribute to inequalities found in traditional cross-sectional studies. It uses the longitudinal 2008 Panel of the Survey of Income and Program Participation (N = 114,345) to describe age-specific patterns of disparity prior to the Affordable Care Act (ACA). A formal decomposition on increment–decrement life tables of insurance gain and loss shows that coverage disparities are predominately driven by minority groups’ greater propensity to lose the insurance that they already have. Uninsured African Americans were faster to gain insurance compared to non-Hispanic whites, but their high rates of insurance loss more than negated this advantage. Disparities from greater rates of loss among minority groups emerge rapidly at the end of childhood and persist throughout adulthood. This is especially true for African Americans and Hispanics, and their relative disadvantages again heighten in their 40s and 50s. 相似文献
2.
Kitae Sohn 《Journal of Labor Research》2010,31(2):124-145
Using the National Education Longitudinal Study, this paper investigates the role of cognitive and noncognitive skills in
overeducation. The results indicate that noncognitive skills as well as cognitive skills substitute for education but the
substitutability decreases with an increasing level of attained education. Also, both types of skills are positively related
to wages, and their returns depend on number of years of required education. In contrast, they play a modest role in job satisfaction
and in receiving trainings. Finally, workers who have attained more education than their cognitive and noncognitive skills
predict behave just like overeducated workers. 相似文献
3.
The multiprocess dynamic model provides a good framework for the modeling and analysis of the time series that contains outliers arid is subject to abrupt changes in pattern. In this paper we extend the multiprocess dynamic generalized linear model to allow for a known non-linear parameter evolution and predictor functions. This is done by approximating the non-linear function by a linear function based on a first order Taylor series expansions. This model has nice properties such as insensitivity to outliers and quick reaction to abrupt changes of pattern. 相似文献
4.
5.
For ranking and selection problems, the true probabiIity of a correct selection P(CS) is unknown even if a selection is made under the indifference-zone approach. Thus to estimate the true P(CS) some Bayes estimators and a bootstrap estimator are proposed for two normcal populations with common known variance. Also a bootstrap estimator and a bootstrap confidence interval are proposed for normal populations with common unknown variance. Some comparisons between proposed estimators and some other known estimators are made via Monte Carlo simulations. 相似文献
6.
Jessie J. Giglio Paula M. Wolfteich William K. Gabrenya Mary L. Sohn 《Journal of child sexual abuse》2013,22(4):396-412
Child sexual abuse changes the lives of countless children. Child sexual abuse victims experience short and long term negative outcomes that affect their daily functioning. In this study, undergraduate students' perceptions of CSA were obtained using vignettes with an adult or child perpetrator and a general questionnaire. Results indicated participants receiving the child-on-child vignette were less likely to rate the vignette as abuse, saw the abuse as less severe, and assigned less blame to the perpetrator than participants reading the adult-on-child vignette. On a general questionnaire, male participants saw child-on-child abuse as less severe and more encouraged by society than did female participants. The information can be utilized by professionals in treatment planning and preventing revictimization at disclosure. 相似文献
7.
The aim of this paper is to examine the association of individual demographic variables and area characteristics with the characteristics of sexual partners of American adolescents. Data for the study were drawn from the National Longitudinal Study of Adolescent Health. The data indicate that the community characteristics of ethnic or racial composition of the population and region were most strongly related to the ethnicity or race of the partner. Regional differences in the ethnicity or race of partners were significant even after controlling for the ethnic or racial composition of the community. Differences in partner's age, grade, neighborhood, and school or residence were not related to school and community characteristics. In addition, the individual characteristics of age, gender, and race or ethnicity were also related to ethnicity or race of partner. 相似文献
8.
9.
A growth curve analysis is often applied to estimate patterns of changes in a given characteristic of different individuals. It is also used to find out if the variations in the growth rates among individuals are due to effects of certain covariates. In this paper, a random coefficient linear regression model, as a special case of the growth curve analysis, is generalized to accommodate the situation where the set of influential covariates is not known a priori. Two different approaches for seleaing influential covariates (a weighted stepwise selection procedure and a modified version of Rao and Wu’s selection criterion) for the random slope coefficient of a linear regression model with unbalanced data are proposed. Performances of these methods are evaluated by means of Monte-Carlo simulation. In addition, several methods (Maximum Likelihood, Restricted Maximum Likelihood, Pseudo Maximum Likelihood and Method of Moments) for estimating the parameters of the selected model are compared Proposed variable selection schemes and estimators are appliedtotheactualindustrial problem which motivated this investigation. 相似文献
10.