Intergroup Behaviour and Ethnicity: A Social Psychological Perspective

Humans exist not only as unique individuals, but also as members of social groups that are formed on the basis of ethnicity, gender, age and so forth. Reflecting this duality are interpersonal and intergroup modes of behaviour, respectively. Thus, humans can act in terms of their personal self and treat others as individuals (interpersonal behaviour); they can also act in terms of group membership and relate to others as members of this or that group (intergroup behaviour). In a mixed marriage, for example, the couple's behaviour toward each other is ‘normally’ interpersonal, but can become intergroup when war breaks out between their respective ethnic groups. Contrary to common sense, factors more minimal than a war are often sufficient to trigger intergroup behaviour. Indeed, seemingly interpersonal encounters are in fact intergroup. How does behaviour shift from interpersonal to intergroup, and with what consequences? To address these questions, I outline a social psychological perspective based on social identity theory and conclude with a discussion on the enigmas of ethnicity.     

Unequal returns to social capital: the study of Malays in Singapore through a network lens

Using the concepts of ‘social capital deficit’ and ‘return deficit’, this study considers the social network aspects of social disadvantage among Malays in Singapore, as compared to Singaporean Chinese. Analysing a 2005 representative survey, we find Malays have less social capital than Chinese, a social capital deficit partly explained by their lower educational attainment. We find no return deficit in earnings: that is, every additional unit of social capital increases earnings equally for Chinese and Malays. However, we find return deficits in education: every additional unit of social capital (e.g. ties to educated parents) increases educational attainment more for Chinese than Malays. In all, this study offers a social capital explanation for Malay ‘plight’, complementing the more conventional explanations of human and economic capital.     

A PANIC Attack on Unit Roots and Cointegration

This paper develops a new methodology that makes use of the factor structure of large dimensional panels to understand the nature of nonstationarity in the data. We refer to it as PANIC—Panel Analysis of Nonstationarity in Idiosyncratic and Common components. PANIC can detect whether the nonstationarity in a series is pervasive, or variable‐specific, or both. It can determine the number of independent stochastic trends driving the common factors. PANIC also permits valid pooling of individual statistics and thus panel tests can be constructed. A distinctive feature of PANIC is that it tests the unobserved components of the data instead of the observed series. The key to PANIC is consistent estimation of the space spanned by the unobserved common factors and the idiosyncratic errors without knowing a priori whether these are stationary or integrated processes. We provide a rigorous theory for estimation and inference and show that the tests have good finite sample properties.     

Language, Power, and Intergroup Relations

Language is a communication medium for turning a power base into influence. But more than that, the creation of power and its maintenance or change can also occur in and through language. In the present article, we discuss some of the dynamic links between language and power to underscore their relevance to the study of intergroup relations. In particular we address the means by which low-power groups might achieve power, and how those who are in high-power positions might retain and subvert acts of power. In doing this, we counterpose our discussion with research that addresses these same issues from a static and individualistic approach to power. Our central argument is that the latter work lacks theoretical facility for describing and understanding the aforementioned dynamic processes of power, and moreover, that its application may unwittingly serve to reify and cement existing control relationships.     

日本杨贵妃传说的流变及思想史考察

日本有相当多关于唐代杨贵妃东渡日本的传说。一些日人相信这些东渡日本的传说,而且还提供文献及遗迹作佐证。杨贵妃在日本是个千面佛,以日本神祇、观音、天仙、政治家、难民及女刺客等不同身份出现。日本的杨贵妃传说虽然流于荒诞,但背后有丰富的历史意义,有助我们了解中国文化如何在日本被本地化。在日本流传的诸多杨贵妃传说中,热田神宫版最具创意及影响力,在日本思想史及中日文化交流史都很有意义。将杨贵妃当作是日本天神的化身,以保护日本是集中古以来流行的本地垂迹说及护国思想。这种思想将中国传入的东西本地化,将中国的东西挪用,变成日本自己的东西。日本中世以至近世热田神宫的杨贵妃传说令中国人眼中的红颜祸水摇身一变成为护国神明。日人崇拜杨贵妃并非因为她是中国人或是基于中国崇拜的心理,而是因为她是日本神祇的化身,所以与民族认同不但没有冲突,反而强化民族主义。     

Determining the Number of Factors in Approximate Factor Models

In this paper we develop some econometric theory for factor models of large dimensions. The focus is the determination of the number of factors (r), which is an unresolved issue in the rapidly growing literature on multifactor models. We first establish the convergence rate for the factor estimates that will allow for consistent estimation of r. We then propose some panel criteria and show that the number of factors can be consistently estimated using the criteria. The theory is developed under the framework of large cross‐sections (N) and large time dimensions (T). No restriction is imposed on the relation between N and T. Simulations show that the proposed criteria have good finite sample properties in many configurations of the panel data encountered in practice.     

Asymptotic Comparison Between Constant-stress Testing and Step-stress Testing for Type-I Censored Data from Exponential Distribution

By running the life tests at higher stress levels than normal operating conditions, accelerated life testing quickly yields information on the lifetime distribution of a test unit. The lifetime at the design stress is then estimated through extrapolation using a regression model. In constant-stress testing, a unit is tested at a fixed stress level until failure or the termination time point of the test, while step-stress testing allows the experimenter to gradually increase the stress levels at some pre-fixed time points during the test. In this article, the optimal k-level constant-stress and step-stress accelerated life tests are compared for the exponential failure data under Type-I censoring. The objective is to quantify the advantage of using the step-stress testing relative to the constant-stress one. A log-linear relationship between the mean lifetime parameter and stress level is assumed and the cumulative exposure model holds for the effect of changing stress in step-stress testing. The optimal design point is then determined under C-optimality, D-optimality, and A-optimality criteria. The efficiency of step-stress testing compared to constant-stress testing is discussed in terms of the ratio of optimal objective functions based on the information matrix.     

Uniform Tail Asymptotics for the Sum of Two Correlated Classes with Stochastic Returns and Dependent Heavy Tails

Consider a continuous-time risk model with two correlated classes of insurance business and risky investments whose price processes are geometric Lévy processes. By assuming that the correlation comes from a common shock, and the claim sizes are heavy-tailed and pairwise quasi-asymptotically independent, we investigate the tail behavior of the sum of the stochastic present values of the two correlated classes, and a uniform asymptotic formula is obtained.     

Is brief daily body–mind–spirit practice desirable for staff who provide services for elderly people? Two pilot studies with care and professional workers

A symptoms-focused approach had only limited short-term effects in addressing burnout. A new trend is toward a positive approach in fostering well-being in the workplace. The current study piloted a daily body–mind–spirit practice programme which provided a 15-minute small-group meeting with staff who provide services for elderly people, towards the end of every workday for one month at two study sites. Repeated measures of burnout, daily spiritual experience (DSE) and engagement were taken at pre-intervention, post-intervention (the intervention lasted for one month) and one month after intervention. The two groups, home help workers and professional staff respectively, showed different patterns in burnout reduction and increase of DSE.