The Economic Impacts of a Terrorist Attack on the U.S. Commercial Aviation System

We use data on air passenger travel expenditures per passenger as well as statistical analysis of the air traffic lost for the two-year aftermath of the September 11, 2001, attacks to estimate direct demand losses for air transportation services. These are used along with a national input-output model to assess the full costs of these losses. Depending on assumptions made, the full losses to the U.S. economy were between $214.3 and $420.5 billion. These estimates are similar to those from other studies of such an event, and suggest that the high costs of effective countermeasures may be justified.     

Robust difference-based outlier detection

Abstract

In this paper, we propose an outlier-detection approach that uses the properties of an intercept estimator in a difference-based regression model (DBRM) that we first introduce. This DBRM uses multiple linear regression, and invented it to detect outliers in a multiple linear regression. Our outlier-detection approach uses only the intercept; it does not require estimates for the other parameters in the DBRM. In this paper, we first employed a difference-based intercept estimator to study the outlier-detection problem in a multiple regression model. We compared our approach with several existing methods in a simulation study and the results suggest that our approach outperformed the others. We also demonstrated the advantage of our approach using a real data application. Our approach can extend to nonparametric regression models for outliers detection.     

Sex-role attitudes and employment status as predictors of perceived life satisfaction among married women in Korea

The focus of this exploratory study is on reexamining the relationship between sex role attitudes and the employment status of married women in Korea, and exploring the nature and extent of women's sex role attitudes and employment status on their life satisfaction (marriage, family, work). Multicluster sampling was used to select 418 women from the city of Seoul. The Attitudes toward Women Scale (AWS) (Spence and Helmreich) was used to measure the concept of sex role attitudes. Life satisfaction was measured by 3 questions: ALLSAT, a general feeling; IGA for the general effect based on Osgood's semantic differential scales; and work status and voluntariness. Background characteristics are given. The results revealed that there was an independent relationship between sex role attitudes and employment status. Based on willingness to work groups (4), those who worked involuntarily had the most conservative sex role attitudes, and those involuntarily nonworking had the most liberal attitudes. When education background was controlled for, there were no significant differences between working and nonworking women and sex role attitudes. There was little relationship observed between sex role attitudes and overall satisfaction. When controlling for employment status, however, sex role attitudes and the relationship to work satisfaction was statistically significant among fulltime housewives, who had conservative attitudes. In fact, fulltime housewives reported greater satisfaction with their role as homemaker than those with liberal sex role attitudes. Women's attitudes and their actual roles has a greater influence on women's life satisfaction than sex role attitudes. Overall, working women are more satisfied with work and overall life than are nonworking women, when the mean satisfaction scored all 6 indicators are used in a 1 way analysis of variance. There were no significant differences in satisfaction with marriage or family life between working and nonworking women. When the intervening variable willingness to work is introduced, this plus employment status affects life satisfaction. The discrepancy between women's sex role attitudes and their work status produces the greatest dissatisfaction. The multiple regression of background variables affecting sex role attitudes shows that parent's encouragement for a woman to work has the strongest effect. Educational attainment has a positive effect on sex role attitudes, and among less well education has a negative effect and positive effect among those well educated, Husband's income is significantly higher than that for working women. Another model expressing reciprocal relations between marriage, family and work satisfaction was generated. Improvements are suggested for future research.     

“I Can Provide for My Children”: Korean Immigrant Women’s Changing Perspectives on Work Outside the Home

Whether immigrant women’s introduction to paid labor empowers them with greater autonomy or exacerbates their oppression has been debated variously in the scholarship on gender and migration. In this paper, the author examines Korean immigrant women’s perspectives on work outside the home after migration. Based on in-depth interview data, the paper emphasizes Korean women’s own interpretations of work and motherhood, and highlights the ways in which they define and redefine work in relation to other aspects of their post-migration experiences. The analysis finds that income producing work is not empowering in and of itself, but contingent upon other post-migration challenges such as economic downward mobility and women’s changed roles as working mothers. Furthermore, women’s perception of work fluctuates over time. The findings suggest that paid work should not be simply interpreted as an empowering change, but the linkage between work and other aspects of immigrant women’s post-migration realities needs to be more closely examined.

Symbolic Appropriation of the Internet: Modernity, Peasant Bodies, and the Image of Familial Intimacy in China’s Nongjiale Tourism Online Advertisements

The peasantry is probably the last social category that researchers of technology and society readily associate with the use of high technologies such as the Internet. But in China recently, tens of thousands of peasant entrepreneurs, engaged in a unique form of rural tourism popularly called nongjiale (delights in farm guesthouses), have adopted the Internet as a medium for advertising their farm guesthouses. This paper is an anthropological study of how Chinese peasant entrepreneurs’ adoption of the Internet is engrained in the broader material and symbolic orders of contemporary Chinese society. By exploring the way in which the Chinese peasants are idiosyncratically involved with the Internet, it also questions whether STS (Science, Technology, and Society) concepts such as users and non-users, developed essentially within Euro-American contexts, are adequate to explain the symbolic appropriations of high-tech in pursuit of modernity in China today.

Logspline Density Estimation under Censoring and Truncation

ABSTRACT. In this paper we consider logspline density estimation for data that may be left-truncated or right-censored. For randomly left-truncated and right-censored data the product-limit estimator is known to be a consistent estimator of the survivor function, having a faster rate of convergence than many density estimators. The product-limit estimator and B-splines are used to construct the logspline density estimate for possibly censored or truncated data. Rates of convergence are established when the log-density function is assumed to be in a Besov space. An algorithm involving a procedure similar to maximum likelihood, stepwise knot addition, and stepwise knot deletion is proposed for the estimation of the density function based upon sample data. Numerical examples are used to show the finite-sample performance of inference based on the logspline density estimation.     

Analysing the Welfare State in Poland, the Czech Republic, Hungary and Slovenia: An Ideal-Typical Perspective

This article applies ideal-typical welfare state theory in analysing the recent transition and the current position of welfare state systems in Eastern Central Europe, taking the cases of Poland, the Czech Republic, Hungary and Slovenia. The article argues that Eastern Central European welfare state systems have returned to their historical and cultural roots of welfare state formation and development, to the time before the onset of state socialism in Soviet times. First, social security policies and social and labour laws were established when the vast bulk of Eastern Central European countries were member states of the Austro-Hungarian Empire, sharing the same political economy, legal system and culture. Over the last 20 years, the socialist system of employment-based social services and benefits has been replaced with Bismarckian-type social security policy and systems. While there are major alterations here and there – in ideal-typical perspective – the four countries under scrutiny share all the major traits of Continental European (Christian Democratic) welfare regimes .     

论王维诗中的同病相怜之情

王维基于自己坎坷不平的“悲剧性”遭遇,往往在诗歌创作中对一些身处不幸的人表示深切的同病相怜之情：首先是对贫寒志士、不幸女子以及不遇将军的悲怨处境表达深厚的同情,以此寄托自己怀才不遇的感慨和幽怨。其次是对那些解印归田、拂衣归山的隐士吐露仰慕和向往的真情,而且表示相从归隐的意愿。