Residential segregation in metropolitan established immigrant gateways and new destinations, 1990-2000

In the 1990s, many immigrants bypassed established gateways like Los Angeles, New York, Chicago, and Miami to create new immigrant destinations across the US. In this paper, we examine how segregation and spatial assimilation might differ between established gateways and new destinations among the 150 largest metropolitan areas. Using data from the 1990 and 2000 censuses, we calculate levels of dissimilarity for Hispanics and Asians by nativity for these two gateway types. Our findings show that segregation levels are consistently lower in new destinations. However, Hispanics in new destinations experienced significant increases segregation during the 1990s, suggesting a convergence in residential patterns by destination type. Nevertheless, in both destinations the native-born are less segregated than the foreign born—consistent with immigrant spatial incorporation. Finally, socioeconomic indicators are generally consistent with predictions of spatial assimilation.     

Three Ways to Be Happy: Pleasure,Engagement, and Meaning—Findings from Australian and US Samples

This study examined the contributions of orientations to happiness (pleasure, engagement and meaning) to subjective well-being. A sample of 12,622 adults from the United States completed on-line surveys measuring orientations to happiness, positive affect, negative affect, and life satisfaction. A sample of 332 adults from Australia also completed these surveys as well as a measure of the big five factor personality traits. Hierarchical regressions generally supported the hypothesis that the three orientations to happiness predict subjective well-being (satisfaction with life, positive affect and negative affect) beyond sociodemographic variables and personality. Meaning and engagement explained the greatest variance in all three components of subjective well-being. Overall, these findings support the importance of a eudaimonic approach in addition to the hedonic approach to achieving happiness. Moreover, findings were relatively consistent in both the Australian and US samples. Some of these data were presented at the 8th Australian Centre on Quality of Life Conference, Melbourne, Australia.     

Measures of association for nominal categorical variables

This paper reviews existing measures of association for nominal categorical variables, and presents some alternative measures of association, which are symmetric and flexible enough to find partial and multiple association.     

Analytical binomial lookback options with double-exponential jumps

We study the problem of the convergence of the adjusted binomial lookback option in double-exponential jump diffusion models. By using the results of [Dai, M., (2000). A modified binomial tree method for currency lookback options. Acta Mathematica Sinica, 16, 445–454; Kou, S., & Wang, H. (2004). Option pricing under a double exponential jump diffusion model. Management Science, 50, 1178–1192] and [Park, H.S., Kim, K.I., & Qian, X. (2009). A Mathematical modeling for the Lookback option with jump diffusion using Binomial tree method. Journal of Computational and Applied Mathematics, preprint], we show the equivalence between the adjusted binomial tree method and the explicit difference scheme. The convergence is also theoretically proved through the notion of viscosity solution. Numerical results coincide with the theoretical results.     

Convergence rates of generalization errors for margin-based classification

This paper develops a general approach to quantifying the size of generalization errors for margin-based classification. A trade-off between geometric margins and training errors is exhibited along with the complexity of a binary classification problem. Consequently, this results in dealing with learning theory in a broader framework, in particular, of handling both convex and non-convex margin classifiers, among which includes, support vector machines, kernel logistic regression, and ψ$\psi$-learning. Examples for both linear and nonlinear classifications are provided.     

The Role of Migration and Single Motherhood in Upper Secondary Education in Mexico

We investigated the link between migration, family structure, and the risk of dropping out of upper secondary school in Mexico. Using two waves of the Mexican Family Life Survey, which includes 1,080 upper secondary students, we longitudinally modeled the role of family structure in the subsequent risk of dropping out, focusing on the role of migration in single motherhood. We found that children living without a father because of international migration or divorce or separation are at a greater risk relative to children in 2‐parent households. Economic characteristics of the household provide a partial explanation for children living in single‐mother households because of divorce or separation but do not explain the greater risk of dropping out for children with fathers in the United States.     

Parental Attachment Among Korean–American Adolescents

The present study examined the relationship between parental care and control perceived by Korean–American adolescents, and further investigated the relationships between parental attachment styles and mental health measures including self-esteem, depression, and social support. The relationship between parental care and parental control resulted in a significantly negative correlation. Parental care showed significantly positive correlations with self-esteem and social support, and a negative correlation with depression. Parental control showed a significantly negative correlation with self-esteem, and a significantly positive correlation with depression. The analysis demonstrated that optimal parenting showed significantly higher self-esteem, lower depression, and higher social support than the other groups.     

反思韩国儒家文化的当代表现

受中国文化的影响和自身选择及发展之需,韩国形成了一个比中国还要典型的儒家文化社会。从20世纪60年代开始,韩国加快了现代化进程,在政治、经济、文化等方面取得了较大进步,这其中必然有儒家思想的积极因素在起作用。但韩国对儒家思想从来没有彻底予以反思。从古至今,韩国社会不仅注重形式和拘泥于名分,而且受儒家观念影响强化了韩国人的家国意识和集体意识,过分强调血缘、地缘、学缘,极度强化男尊女卑的理念等等。这些因素都不利于当代多元化社会的健康发展,并成为韩国进入名副其实的先进国家的障碍。最近,中国社会出现了儒家文化复兴热潮,对于这种儒学热,我们应该理性看待,要吸取历史的教训,有选择地继承。     

Regional source apportionment of PM2.5 in Seoul using Bayesian multivariate receptor model

Seoul, the capital city of Korea with over 10 million residents, has been experiencing serious air pollution problems. Previous studies on source apportionment of PM2.5 in Seoul are based on measurements of chemical compositions of PM2.5 from a single monitoring site. In this paper, we analyse PM2.5 concentration data collected from multiple sites in 24 districts of Seoul and estimate regional source profiles using Bayesian multivariate receptor model. The regional source profiles provide information for the identification of major PM2.5 sources as well as the regions relatively more seriously affected by each source than other regions. These regional characteristics relevant to PM2.5 can help establish effective, customised, region-specific PM2.5 control strategies for each region rather than general strategies that apply to every region of Seoul.     

Conditional optimal spacing in exponential distribution

In this paper, we propose the conditional optimal spacing defined as the optimal spacing after specifying a predetermined order statistic. If we specify a censoring time, then the optimal inspection times for grouped inspection can be determined from this conditional optimal spacing. We take an example of exponential distribution, and provide a simple method of finding the conditional optimal spacing.