Some properties of a linear combination CUSUM statistic for controlling a multivariate mean vector

We develop a class of new multivariate procedures for monitoring quality by detecting a change in the level of a multivariate process. Following the ideas of S.N. Roy, we first consider a linear combination statistic which results from projecting the multivariate observations onto a unit vector and then maximizing a selected univariate statistic over all directions.     

Generation,Displacement, and Deservedness among Karen Refugees in California

In this article, we draw on ethnographic interviews with sixteen Karen refugees living in San Diego, California to explore how experiences of exile, displacement, and resettlement differ along generational lines and complicate straightforward dichotomies between “involuntary refugees” and “economic migrants”. While older‐generation Karen experienced political violence and displacement first‐hand, younger‐generation Karen were born in refugee camps in Thailand and usually experienced violence and displacement through its impacts on extended families. Across both generations, Karen exerted agency in exile, displacement, and diaspora. The older generation used stays in refugee camps strategically as a means of economically supporting family members in Burma, while the younger generation view resettlement in the US as a way of achieving educational aspirations. This research points to the importance of generation as a dimension of refugee experience and to the problem of reinforcing victimhood within refugee communities rather than acknowledging refugee agency and resilience.     

Functional Ability,Neighborhood Resources and Housing Satisfaction among Older Adults in the U.S.

The purpose of this study was to explore neighborhood resources that influence the housing satisfaction of older adults. The study included 10,146 participants from the 2009 panel of the American Housing Survey who were 65 years and older. Hierarchical regression modeling was performed to examine older adults’ perceptions of neighborhood resources and consequently the role these resources play in predicting housing satisfaction among community dwelling and residents of assisted living, controlling for age, sex, ethnicity, education, and housing maintenance. In addition, three levels of physical functioning among residents of assisted living were examined. Results showed that there were differences in housing satisfaction by residences and levels of physical functioning. Subjective evaluations of neighborhoods and the near surrounds were significant predictors of housing satisfaction. Results of the study suggest that policy makers and housing professionals need to continue to consider the role of supportive neighborhoods and social environments in promoting successful aging particularly for frail older adults.     

Causal inferences from many experiments

The underlying statistical concept that animates empirical strategies for extracting causal inferences from observational data is that observational data may be adjusted to resemble data that might have originated from a randomized experiment. This idea has driven the literature on matching methods. We explore an un-mined idea for making causal inferences with observational data – that any given observational study may contain a large number of indistinguishably balanced matched designs. We demonstrate how the absence of a unique best solution presents an opportunity for greater information retrieval in causal inference analysis based on the principle that many solutions teach us more about a given scientific hypothesis than a single study and improves our discernment with observational studies. The implementation can be achieved by integrating the statistical theories and models within a computational optimization framework that embodies the statistical foundations and reasoning.     

On the Cusum test for parameter changes in garch(1,1) Models

This paper considers the problem of testing parameter constancy in GARCH(1,1) models. A cusum of squares test is propesed in analogy Of Incl´n and Tiao (1394)'s statistic. its limiting distribution is derived via using the invariance principle for mixingaie sequences obtained by McLeish(1975). Simulation results are illustrated to demonstrate the validity of the cusum test.     

论萧颖士、李华的文学思想

萧颖士、李华在韩愈与柳宗元之前早已提到过唐代古文运动的中心思想--"尚古"、"宗经"、"载道",并且和韩、柳一样提倡了魏晋以前的古文;萧、李所提到的古文理论稍微不同,萧颖士认为魏晋以前的文人及其文章,虽不完全合于六经,但勉强称得上是追求尚古的文人及其文章,还不忘记取舍于老庄、释典的思想观念,同时也不强求"微旨",而李华在"尚古"与"宗经"上只重视六经的传统;再就"载道"而言,萧颖士反映了韩、柳般的载道思想,而李华在载道上结合道德,强调了道德文学论.     

Ambient temperature,birth rate,and birth outcomes: evidence from South Korea

Population and Environment - The effects from rising temperatures, a symptom of climate change, have become a significant concern. This study finds that one additional day with a maximum...