Tukey’s M-estimator of the Poisson parameter with a special focus on small means

We treat robust M-estimators for independent and identically distributed Poisson data. We introduce modified Tukey M-estimators with bias correction and compare them to M-estimators based on the Huber function as well as to weighted likelihood and other estimators by simulation in case of clean data and data with outliers. In particular, we investigate the problem of combining robustness and high efficiencies at small Poisson means caused by the strong asymmetry of such Poisson distributions and propose a further estimator based on adaptive trimming. The advantages of the constructed estimators are illustrated by an application to smoothing count data with a time varying mean and level shifts.     

FOOD PRICES,WAGES, AND WELFARE IN RURAL INDIA

With soaring food prices in recent years has come alarm about rising poverty in the developing world. Less appreciated, however, is that many of the poor in agricultural economies may benefit from higher wages. This study finds that wages for manual labor in rural India, both within and outside agriculture, rose faster in districts growing more of those crops with large producer price run‐ups over the 2004–2009 period. Based on a general equilibrium framework that accounts for such wage gains, rural households across the income spectrum are found, contrary to more conventional welfare analysis, to benefit from higher agricultural prices. (JEL Q17, Q18, F14)     

Between Egyptian "national purity" and "local flexibility": prostitution in al-Mahalla al-Kubra in the first half of the 20th century

This article traces prostitution in al-Mahalla in the first half of the 20th century as a regulated urban practice until the trade was outlawed in Egypt in 1949. Studying prostitution during this period of exceptionally rapid growth and transformation not only provides a window on a particular type of illicit sexuality and public morality in a colonial context, it also gives us a hint as to gender relations and inter-communal relations on the invisible marginalized part of a provincial local community, and how it was socially transformed. I argue that the regulation of prostitution in Egypt in 1882 and 1905 created a sphere for a power contest between the colonial state and the local community, between nationalist discourse and the local way of life, and between public morality and private space. While nationalist discourse constructed one virtuous nation, the local community accepted the licensed prostitution quarter, and resisted secret prostitution. The people of the town actively and continually shifted boundaries on what was public and what was private, what was the state's responsibility and what was communal liability.     

Challenges facing women leaders in Saudi Arabia

As a result of increasing enrolment of women in all levels of education and various fields of employment and aspects of public life in Saudi Arabia, the last 10 years witnessed a growing participation of women in senior management positions and in the decision-making process in public and private sectors. Recent developments indicate a clear strategic direction of policy makers and development plans in Saudi Arabia towards an even greater role for women in public life and into top leadership positions in public domains. In spite of the considerable role of women in Saudi society, evidence suggests that women in leadership positions are facing a different reality from their male counterparts due to organizational, personal and cultural challenges that impede their effectiveness as leaders. Through a survey of 160 women leaders, this article attempts to identify the challenges that women leaders face in government sectors in Saudi Arabia. Findings indicate that the main challenges are: structural challenges, lack of resources and lack of empowerment, while cultural and personal challenges ranked last, contrary to common perception. The study ultimately provides a set of recommendations with implications for leadership development in general, in order to address challenges that women leaders face and enhance their leadership role.     

Quantitative Risk Assessment of Human Salmonellosis in Canadian Broiler Chicken Breast from Retail to Consumption

The current quantitative risk assessment model followed the framework proposed by the Codex Alimentarius to provide an estimate of the risk of human salmonellosis due to consumption of chicken breasts which were bought from Canadian retail stores and prepared in Canadian domestic kitchens. The model simulated the level of Salmonella contamination on chicken breasts throughout the retail‐to‐table pathway. The model used Canadian input parameter values, where available, to represent risk of salmonellosis. From retail until consumption, changes in the concentration of Salmonella on each chicken breast were modeled using equations for growth and inactivation. The model predicted an average of 318 cases of salmonellosis per 100,000 consumers per year. Potential reasons for this overestimation were discussed. A sensitivity analysis showed that concentration of Salmonella on chicken breasts at retail and food hygienic practices in private kitchens such as cross‐contamination due to not washing cutting boards (or utensils) and hands after handling raw meat along with inadequate cooking contributed most significantly to the risk of human salmonellosis. The outcome from this model emphasizes that responsibility for protection from Salmonella hazard on chicken breasts is a shared responsibility. Data needed for a comprehensive Canadian Salmonella risk assessment were identified for future research.     

Social resources and Arab women’s perinatal mental health: A systematic review

Background

Women’s mental health in the perinatal period is understudied worldwide and in Arab countries especially.

Rise of the Regulatory Welfare State? Social Regulation in Utilities in Israel

This article explores the relation between economic liberalization, regulation and welfare. It asks how the state regulates, delays or prevents service disconnection due to debt and arrears, and what this kind of policy implies regarding the use of regulation as a form of social policy. This is done through a comparative study of the electricity and water sectors in Israel after liberalization. It finds that after initial economic reform, both sectors saw a growth in regulation intended to compensate for the social effects of reform, in what may be termed the ‘regulatory welfare state’. However, this form of social protection has been residual and incoherent. The article argues that trying to separate economic reform from its social consequences is unrealistic and may lead to adverse social and economic results. Second, findings raise concerns regarding the potential of the regulatory welfare state to deliver effective and fair social policy.     

Online scheduling with rejection and reordering: exact algorithms for unit size jobs

We study an online scheduling problem with rejection on \(m\ge 2\) identical machines, in which we deal with unit size jobs. Each arriving job has a rejection value (a rejection cost or penalty for minimization problems, and a rejection profit for maximization problems) associated with it. A buffer of size \(K\) is available to store \(K\) jobs. A job which is not stored in the buffer must be either assigned to a machine or rejected. Upon the arrival of a new job, the job can be stored in the buffer if there is a free slot (possibly created by evicting other jobs and assigning or rejecting every evicted job). At termination, the buffer must be emptied. We study four variants of the problem, as follows. We study the makespan minimization problem, where the goal is to minimize the sum of the makespan and the penalty of rejected jobs, and the \(\ell _p\) norm minimization problem, where the goal is to minimize the sum of the \(\ell _p\) norm of the vector of machine completion times and the penalty of rejected jobs. We also study two maximization problems, where the goal in the first version is to maximize the sum of the minimum machine load (the cover value of the machines) and the total rejection profit, and in the second version the goal is to maximize a function of the machine completion times (which measures the balance of machine loads) and the total rejection profit. We show that an optimal solution (an exact solution for the offline problem) can always be obtained in this environment, and determine the required buffer size. Specifically, for all four variants we present optimal algorithms with \(K=m-1\) and prove that in each case, using a buffer of size at most \(m-2\) does not allow the design of an optimal algorithm, which makes our algorithms optimal in this respect as well. The lower bounds hold even for the special case where the rejection value is equal for all input jobs.     

作为中国文学之《圣经》: 麦都思、王韬与“《圣经》委办本”

在 19世纪,中国最大的一项翻译工程大概要算是《圣经》翻译了。从 19世纪 20年代到60年代,先后有五种《圣经》中译本由新教宣教会完成并出版问世。本文所讨论之《圣经》委办本,亦涉及许多传教士和他们的中国助手。围绕《圣经》中译之方法,传教士之间发生了激烈争吵。争论的焦点主要集中于究竟是绝对忠实于希伯来和希腊原文,还是要保证中国读者能够读懂接受。争论的第二个焦点在于中译本的文言水平(白话《圣经》中译本是稍晚才出现的) :究竟是用受教育者能接受的标准文言,还是用初识文墨之人亦能读懂的更粗浅的文言 .有关读者接受以及标准文言使用之话题的挑起者,乃传教士麦都思,他期待能够完成一部可以被称为中国文学的《圣经》中译本。在 1843年至 1854 年间完成的“《圣经》委办本”中,麦都思最终几乎将自己的理想付诸实施。此目标的基本要求就是要找到中国协作者,协作者能够将传教士及其中国助手的工作转化成让人接受的中国散文。麦都思最初的人选为王昌桂,他是一位教授中国经典的儒生,但在新约《圣经》完成之前已去世。麦都思继而聘用了他当时尚年轻的儿子王韬,王韬协助完成了整部《圣经》,同时还写了一些宣教小册子,并修订了一部圣歌集。王韬的译者经历亦让我们对其早期思想的发展有了诸多了解。     

Evaluating Potential Environmental Variables and Active Aging in Older Adults for Age-Friendly Neighborhoods in Malaysia

As Malaysia's population is aging rapidly, and since there is no specific housing policy for the elderly, it is vital that neighborhoods meet the different needs of elderly for active aging to maintain their quality of life. This study aims to investigate the neighborhood environmental variables, the outcome active aging, and potential variables that inhibit active aging in the elderly that lead to their quality of life. It examined quality-of-life determinants that are influenced by the existence of certain neighborhood characteristics. In the study, 385 older adults aged 60+ years residing in two different cities in Malaysia were surveyed. Multiple regression was used to explore how much variance in active aging variables the neighborhood environmental factors explained as a group. The results showed that permeability, accessibility, and facilitators to walking are key determinants of active aging. There is a need to improve the physical design of the neighborhoods with regard to these three factors.