A Nonparametric Test Procedure Based on Quantiles for the Right Censored Data

In this study, we propose nonparametric tests using the several quantile statistics simultaneously for the right censored data. First of all, we consider statistics of the quadratic form with estimated covariance matrices. Then we derive the limiting distribution using the large sample approximation theory. Also we consider different forms of statistics such as the maximal and summing types with their limiting distributions. Then we illustrate our procedure with examples and compare performance among tests with empirical powers through a simulation study. Also we comment briefly on some interesting features including re-sampling methods as concluding remarks. Finally in Appendices, we provide proofs for the theoretic results needed for the derivation of the limiting distributions of the proposed test statistics.     

The Development of a Screening Tool for the Adult Children of Alcoholics Traits (STACAT)

In order to develop a valid tool for screening the traits of adult children of alcoholics (ACOA), this study focused on finding common characteristics among ACOA and developing a tool based on those characteristics. An item pool was generated targeting three distinct characteristics discussed in the alcohol literature related to ACOA, and the items were reviewed by a panel of experts. Using data from the sample, a confirmatory factor analysis, t -test and correlation analysis were conducted to gather various validity evidences for the screening tool. Cronbach's coefficient alpha test was used to check the internal consistency of the tool. The evidence of the reliability and validity for the ACOA traits screening tool provide the social work practice with an empirically validated method of measuring these traits in the children of alcoholics.     

Import competition and job displacement: A case study of Korean manufacturing industries

This paper investigates the impact of import competition on job displacement in Korean manufacturing industries. Using a regression model for the period of 1993–2003, the empirical results show that import competition raises the job displacement rate in the Korean manufacturing sector but the elasticity is negligible in its magnitude. Worker characteristics, such as gender, age, job tenure, and education level, proved to be significant in determining the displacement rate. Characteristics of displaced workers in high import-competing industries are also investigated based on the survey data. Workers who lost their jobs in these sectors were slightly older, less educated, and had longer job tenure than the workers in the other groups.     

Single Parenthood and Children’s Reading Performance in Asia

Using the data from Program for International Student Assessment, I examine the gap in reading performance between 15‐year‐old students in single‐parent and intact families in 5 Asian countries in comparison to the United States. The ordinary least square regression analyses show negligible disadvantages of students with a single parent in Hong Kong and Korea, once students’ demographic characteristics and socioeconomic background are held constant. Students in single‐parent families in Indonesia and Thailand outperform their peers in intact families. The negative effect of single parenthood remains significant in Japan, even after parent‐child communication is controlled. Interpreting the weak effect of single parenthood in the Asian countries, I consider extended family systems and the relatively high proportion of widowhood among causes of single parenthood.     

Who is Appointed to What Position? The Politics of Appointment in Quangos of Korea

This study identifies the determinants of appointment of executives in quangos. Using data from 85 quangos in Korea over 15 years between 1993 and 2007, we investigate the degree to which various characteristics of organizational actors affect the choice of executives. Three organizational actors include presidents, sponsoring government departments, and the concerned quangos. Although results vary by executive position, the findings of the empirical analysis with multinomial probit and generalized linear mixed models support the idea that the appointment of quango executives is not the result of presidential choice but that of the interactions among the key organizational actors, with different incentives and resources, on the appointment. Compared to former bureaucrats, presidential allies are more likely to be appointed when presidents have more political support from the National Assembly and it is easier for insiders to be promoted as executives from larger and older quangos with clear legal origins.     

Top Team Diversity,Internationalization and the Mediating Effect of International Alliances*

This study examines the mediating effect of international alliances for the relationship between TMT (top management team) job‐related diversity (educational, functional background, outside industry experience and international exposure) and firm internationalization. We argue that firms with greater TMT diversity will use more international alliances, resulting in higher firm internationalization. Based on a sample of 226 US firms during the period 1988–1994, we find that international alliances partially mediate the relationship between TMT international exposure diversity and firm internationalization. However, we do not find international alliances to mediate the relationships between other forms of TMT diversity and firm internationalization. We discuss implications and directions for future research.     

International and Intersectoral R&D Spillovers in the OECD and East Asian Economies

This study empirically explores international and intersectoral R&D spillover effects on the total factor productivity growth of manufacturing and nonmanufacturing sectors based on a pooled time-series data set of 14 OECD economies and 3 East Asian economies—Korea, Singapore, and Taiwan. The study finds that foreign manufacturing R&D has strong influence on domestic productivity growths of both sectors and that domestic manufacturing R&D has a substantial intersectoral R&D spillover effect on domestic nonmanufacturing productivity growth. The social rates of return to manufacturing R&D are estimated to be two to six times greater than the private rates of return.     

Ridge Regression Estimation for Survey Samples

This paper describes procedure for constructing a vector of regression weights. Under the regression superpopulation model, the ridge regression estimator that has minimum model mean squared error is derived. Through a simulation study, we compare the ridge regression weights, regression weights, quadratic programming weights, and raking ratio weights. The ridge regression procedure with weights bounded by zero performed very well.