In the path of heroes: second-generation Tamil-Canadians after the LTTE

This paper explores how second-generation Tamil-Canadian university students have modified their ‘cultural heritage’ in the period after the defeat of the Liberation Tigers of Tamil Eelam (LTTE) in May 2009. Using a generational framework suggested by the work of Karl Mannheim, I show that the events of May 2009 situated second-generation Tamil-Canadian political activism as a response to the ambivalence of their parents to the conflict in Sri Lanka. Second-generation Tamil-Canadians are also shown to have altered the key LTTE symbol of the Maaveerar (great hero) to better fit a transnational social field that is framed by the new realities of post-LTTE Sri Lanka and by intolerance to imported conflict in Canada. I argue that the Tamil second generation is highly engaged with the politics of their cultural identity, and that this engagement may have a lasting influence on transnational Tamil identity and on the political status of the Tamil community within Canada.     

New flexible models generated by gamma random variables for lifetime modeling

In this paper we introduce a new three-parameter exponential-type distribution. The new distribution is quite flexible and can be used effectively in modeling survival data and reliability problems. It can have constant, decreasing, increasing, upside-down bathtub and bathtub-shaped hazard rate functions. It also generalizes some well-known distributions. We discuss maximum likelihood estimation of the model parameters for complete sample and for censored sample. Additionally, we formulate a new cure rate survival model by assuming that the number of competing causes of the event of interest has the Poisson distribution and the time to this event follows the proposed distribution. Maximum likelihood estimation of the model parameters of the new cure rate survival model is discussed for complete sample and censored sample. Two applications to real data are provided to illustrate the flexibility of the new model in practice.     

Generalized Estimation of the BLUP in Mixed-Effects Models: A Comparison with ML and REML

The Best Linear Unbiased Predictor (BLUP) in mixed models is a function of the variance components and they are estimated using maximum likelihood (ML) or restricted ML methods. Nonconvergence of BLUP would occur due to a drawback of the standard likelihood-based approaches. In such situations, ML and REML either do not provide any BLUPs or all become equal. To overcome this drawback, we provide a generalized estimate (GE) of BLUP that does not suffer from the problem of negative or zero variance components, and compare its performance against the ML and REML estimates of BLUP. Simulated and published data are used to compare BLUP.     

Preliminary Development and Validation of the Social and Emotional Health Survey for Secondary School Students

This study reports on the preliminary development and validation of the Social and Emotional Health Survey (SEHS) with a sample of 4,189 (51 % female) California students in Grades 8, 10, and 12. The SEHS was designed to measure the psychological building blocks of adolescents’ positive mental health and is operationalized in the present study by a theoretical model comprised of 12 measured indicators that form four first-order domains (belief-in-self, belief-in-others, emotional competence, and engaged living) that, in turn, contribute to one underlying, second-order meta-construct called covitality. This study was the first to investigate the validity and utility of the adolescent covitality construct, which is conceptualized as the synergistic effect of positive mental health resulting from the interplay among multiple positive-psychological building blocks. Findings from confirmatory factor analyses, invariance analysis, and latent means testing all supported the theoretical model underlying the SEHS, indicating that the second-order covitality model was the best fit for both males and females. Results from a path-modeling analysis indicated that covitality was a strong predictor of students’ subjective well-being (operationalized as a composite of life satisfaction, positive affect, and negative affect), and findings from additional concurrent validity analyses indicated that adolescents’ covitality level was significantly associated with self-reported academic achievement, perceptions of school safety, substance use, and experiences of depressive symptoms. Implications for theory, practice, and future research are discussed.     

从葛逻禄到喀喇汗王朝

葛逻禄是由三个部落组成的联盟,唐代时分属唐朝4个都督府管辖。从766年起葛逻禄成为伊斯兰世界的紧邻,并在中亚形成一种势力。840年蒙古高原的回纥汗国灭亡,回纥散往四方,其一支逃往葛逻禄避难。喀喇汗王朝是葛逻禄统治者接受了回纥汗国阿史那汗族（或“阿夫拉西亚勃家族”的一支）归这一家族所有的可汗职位。在伊斯兰历史著作中有三条关于萨曼王朝的伊斯玛因于893年对西部喀喇汗国战争的报道,它们可以相互补充。此外,这三个报道中还有关于喀喇汗王朝与葛逻禄为同一部族的重要情报。     

Children's influence on household economic activity in Nigeria

This study estimates the effects of children's economic contributions on parents' allocation of time for income-earning activities, care of preschool children, non-income home production, and leisure activities in Ile-Ife, Nigeria. Fathers spent 65% of work time, mothers 20%, and children 15% during the assessment of family time allocation and income contribution. Demographic factors affecting the parents' time for the children include age of parents, age and sex of children and the number of other people living in the household. Economic factors affecting parents' time allocation include education, house value, wealth, and combined income of parents. Major observations noted were the following: 1) children contribute non-negligible amounts of income and time to their families' income-earning activities; 2) they play important roles in non-income home production and child care activities; 3) their presence has a considerable influence on their parent's allocation of time; 4) children appear to stimulate fathers to work longer hours at the expense of leisure; 5) young children reduce mothers' time in income-earning activities and leisure time; 6) older male children substitute for mothers' shorter work time; 7) older female children substitute for mothers' lesser home production time; and 8) older children of both sexes appear to increase mothers' leisure time.     

A macroeconomic potential describing structural change of the economy

For the purpose of describing change in an economy's structure, and addressing issues of transformation, the notion of a time-dependent macroeconomic potential function is introduced. It penalizes deviations from equilibrium (entrepreneurial error) and induces moves toward equilibrium. Thus, from the concept of a potential function is derived the concept of short-term and long-term change forces. We focus here on the long-term structural changes of an economy as distinct from short-term cyclical variations, and we represent economic transformations as phase-transitions between monostable and ambiguous bistable states of the economy. One important feature of the potential function approach is that the parameter of the potential can be determined from empirical data. In particular, the parameters can be regressed for input variables. Hence, a relationship has been established between the structural change force and a set of input variables, some of which are controlled in part by either public or private sector agents. The method has been applied to West German and United States industry data for 1950–1980.     

从"混沌"到"抽象":经济科学研究对象的统一性

经济科学都是以经济活动及其关系作为自己的研究对象的 ;虽然在近 2 0年来经济活动发生了向其他领域的“延伸” ,但它本身的“经济”意义并没有丧失。因此还需要坚定地把握经济活动及其关系对各门具体经济学科所具有的这种统一性。     

World Development and the Restructuring of the Industrial Economies

This paper reports on the joint SPM/CRANEC Catholic University of Milan symposium on “World Development and the Restructuring of Industrial Economies” held at Bellagio, Lake Como, Italy during the week of 10–15 September 1979. The symposium was organized to discuss the adjustments required by the industrialized economies when adapting to the changes inherent in present world development trends, as well as to help define national and international policy measures that might be used to facilitate the restructuring process. This report reviews the key issues, alternative strategies for restructuring, and policy measures for restructuring discussed at the symposium. It also offers some conclusions based on the results of the symposium.