Bayes Estimation Based on Random Censored Data for Some Life Time Models Under Symmetric and Asymmetric Loss Functions

Censored data arise naturally in a number of fields, particularly in problems of reliability and survival analysis. There are several types of censoring; in this article, we shall confine ourselves to the right randomly censoring type. Under the Bayesian framework, we study the estimation of parameters in a general framework based on the random censored observations under Linear-Exponential (LINEX) and squared error loss (SEL) functions. As a special case, Weibull model is discussed and the admissibility of estimators of parameters verified. Finally, a simulation study is conducted based on Monte Carlo (MC) method for comparing estimated risks of the estimators obtained.     

阿中新闻、文化合作建言

阿拉伯国家与中国正建立全面合作伙伴关系,双方政治合作取得了丰硕成果.然而阿中新闻与文化合作相对滞后,它在一定程度上阻碍了阿中全面合作伙伴关系的发展.因此,加强双方在此领域的合作与交流具有重要性和紧迫性.     

Hotelling’s T2 control chart with double warning lines

Recent studies have shown that the T ² control chart with variable sampling intervals (VSI) and/or variable sample sizes (VSS) detects process shifts faster than the traditional T ² chart. This article extends these studies for processes that are monitored with VSI and VSS using double warning lines (T ² —DWL). It is assumed that the length of time the process remains in control has exponential distribution. The properties of T ² —DWL chart are obtained using Markov chains. The results show that the T ² —DWL chart is quicker than VSI and/or VSS charts in detecting almost all shifts in the process mean.     

Subjective discount rates among Israeli Arabs and Israeli Jews

In this study, we compare the subjective discount rate for Israeli Jews and Arabs. All the subjects were bank customers, who were asked to bid and ask prices for delayed fixed amounts and for lotteries. The two populations live in the same country under the same laws. Nevertheless, according to the literature, Israeli Arabs seem to be a discriminated minority, who exhibit traits of a traditional collectivist culture, while Israeli Jews are a majority, who exhibit traits of an individualistic culture. As a discriminated minority, Israeli Arab may suffer from lower trust and as a result, according to the “trust” hypothesis, exhibit higher subjective discount rates and higher risk aversion. On the other hand, according to the “cushion” hypothesis, a collectivist society such as Israeli Arabs, provides a safety net for the individual and as a result, he will exhibit lower subjective discount rates and lower risk-aversion. The experimental findings show that the subjective discount rate and risk aversion of Israeli Arabs are significantly higher than that of Israeli Jews. Moreover, higher percent of Israeli Jews are at the low range of the discount rates (below 10%) and lower percent of Israeli Jews are at the high range of discount rate (above 20%) compared to Israeli Arabs. This is consistent with the “trust” hypothesis. For Israeli Jews, the discount rates are closer to the bank interest rate, while Israeli Arabs rates are much higher particularly for receipt. The dispersion of the distribution of discount rate is much larger for Arabs than for Jews.     

The Role of Social Networks in the Recruitment of Youth in an Islamist Organization in Pakistan

Drawing on data from 40 qualitative interviews, this article examines how young people are connected with one influential Islamist student organization in Pakistan. It provides deeper insight into the micro-level mechanisms and processes by which new members are approached and drawn closer to the particular organization. Findings reveal that young people who joined this organization did not necessarily do so because of their ideological affinity, political or social grievances or because of macro-level events occurring in the national or global arena, such as the U.S.-led war on terror. Rather, they predominantly ended up in the organization because of their friends and acquaintances who were activists in the organization.     

Professional and Functional Alternative Social Workers: A Case Study of Malaysia

The objective of this study was to compare “professional” (PW) and “functional alternative” (FA) social workers. The findings suggested that there were no significant differences between PWs and FAs in intervention, evaluation methods, work ethics, and values. The PWs, in clients' eyes, were better at delivering services, while FAs' services were more satisfactory to the clients. While PWs were supposed to be “professional,” FAs were more “professional” than PWs in their performance despite their lack of recognition as “professional social workers”. These critical findings should encourage academics and practitioners for further discussion on conceptual implications of both practices and expand future research.