Estimation of parameters of a polynomial model under intra class correlation structure for incomplete longitudinal data

The problem of analyzing and modeling incomplete longitudinal data arising from clinical and epidemiological studies are discussed, A method for handling arbitrarily missing observations under the intra class correlation structure and a polynomial model is developed. Explicit expressions for likelihood equations and information matrix for a second degree polynomial model are provided. The method is illustrated through an example.     

An empirical examination of the science–technology relationship in the biotechnology industry

Understanding how a firm's scientific capability influences its technology development has important implications on the firm's research and development (R&D) strategies. However, the current literature reveals a puzzling outcome in its empirical investigations on the science–technology relationship. While many studies show the positive influence of a firm's scientific capability on its technological performance, a few others indicate that if a firm focuses its attention more on cutting edge science, its overall technological performance will suffer. We suggest that these findings can be reconciled by conceptualizing and measuring the scientific capability of the firm differently. This paper attempts to demonstrate how different notions of scientific capability are associated with different performance outcomes. Furthermore, a firm's scientific capability facilitates the integration of new knowledge to produce valuable technologies when a firm broadens its search for new knowledge. The paper highlights the nuances of conceptualizing and measuring the firm's scientific capability in two different ways: number of scientific publications and non-patent references. The findings also shed light on the mechanism through which science accelerates technological progress inside a firm.     

Gender in Social Work Education and Practice in India

Social work as a profession is committed to the creation of an equal and just society. Social work pedagogy combines an analysis of psychosocial, economic and political contexts and methods of active intervention and administration of social welfare. Gender sensitization and awareness is an integral component of social work education and training in India. Through conscious efforts students are enabled to imbibe the concept of gender, to look at women not only as individual entities but also in relation to men, and the way relations between the two are socially constructed. This paper examines the integration of a gender perspective in social work education and practice and explores how this may play a part in enabling students to ‘unlearn’ their gender stereotypes imbibed during socialization. The paper draws on case study examples of some projects in India.     

Extended Producer Responsibility for E‐Waste: Individual or Collective Producer Responsibility?

We investigate the implications of collective and individual producer responsibility (CPR and IPR, respectively) models of product take‐back laws for e‐waste on manufacturers’ design for product recovery (DfR) choices and profits, and on consumer surplus in the presence of product competition. We show that IPR offers superior DfR incentives as compared to CPR, and provides a level competitive ground. CPR may distort competition and allow free‐riding on DfR efforts to reduce product recovery costs. Thus, manufacturer preferences for IPR or CPR may differ because of the free‐riding implications under CPR, with even high‐end manufacturers having incentives to free‐ride under certain competitive conditions. The policy choice between IPR and CPR is not clear cut from an economic welfare perspective. This choice involves a comparison between the effects of superior recovery cost reduction through improved DfR under IPR and the operational cost‐efficiency under CPR.     

Variance partitioning in multilevel logistic models that exhibit overdispersion

Summary.  A common application of multilevel models is to apportion the variance in the response according to the different levels of the data. Whereas partitioning variances is straightforward in models with a continuous response variable with a normal error distribution at each level, the extension of this partitioning to models with binary responses or to proportions or counts is less obvious. We describe methodology due to Goldstein and co-workers for apportioning variance that is attributable to higher levels in multilevel binomial logistic models. This partitioning they referred to as the variance partition coefficient. We consider extending the variance partition coefficient concept to data sets when the response is a proportion and where the binomial assumption may not be appropriate owing to overdispersion in the response variable. Using the literacy data from the 1991 Indian census we estimate simple and complex variance partition coefficients at multiple levels of geography in models with significant overdispersion and thereby establish the relative importance of different geographic levels that influence educational disparities in India.     

对方代理，为己所用

雇用代理人的好处尽人皆知。但是,谈判专家常常忽略可以想方设法将对方的代理人变为我方的有利条件在有关谈判的文章中,出于各种原因,人们常会建议你选用代理人代表你来讨价还价。诸如离婚律师或地产经纪这样的代理人,可能在你不熟悉的领域拥有特定的专业技     

Engineering manpower planning in an airline

Next to the crew on the flight deck of an aircraft, the engineers and technicians form the core of the manpower requirement of an airline. The aviation industry is a specialised one. There are mandatory requirements regarding the airworthiness of an aircraft and certification of engineers and technicians working on or inspecting an aircraft. The requirements of Engineers and Technicians cannot be directly met from the products available from Engineering Colleges and Technical Institutes. Furthermore, 3–4 years of experience in aviation industry is a prerequisite laid down by Civil Aviation Departments for obtaining their licence or approval to work as Engineers and Inspectors in Inspection Organisations. Hence planning of Engineering manpower requirements well in advance is a must for an Airline. The objective of this paper is to discuss the long term planning for engineering manpower resource, in an airline.     

The Influence of ISO 9000 Certification on Process Compliance

This article examines the influence of ISO 9000 certification on plant‐level process compliance, which arguably is its first‐order, targeted performance dimension. The empirical setting is the medical device manufacturing industry. Process compliance is measured through Food and Drug Administration inspections of manufacturing plants. We control for several observable factors that possibly affect process compliance by matching certified plants with non‐certified plants. Using longitudinal data, we find plants that obtained certification in the earlier diffusion period (early‐certified plants) tend to have significantly better process compliance than a matched, non‐certified control group of plants. The compliance difference between early‐certified plants and their matched control group is greater than the compliance difference between late‐certified plants and their matched control group. We also find deterioration in process compliance over time after certification. Because we capture longitudinally the first‐order effects of ISO 9000 on process compliance, this study provides a useful baseline for assessing causality in ISO 9000‐performance linkages. Also, we explain, in part, the inconsistencies observed in related ISO 9000 literature examining the performance effects of certification. Further, this research offers managerial insights on the dynamics of certification and process compliance with time, and highlights the need for continued vigilance post certification.     

Rabbi Engagement with the Peace Process in the Middle East*

Objectives. Support for Israel has been a hallmark issue of the Jewish lobby in American politics. But what do Jewish religious leaders think about U.S. policy toward Israel and the peace process, and how often do they address these issues? Methods. Using a sample of more than 400 rabbis drawn from the four major movements of American Judaism in the fall of 2000, we investigate rabbi views of and speech about foreign affairs, especially about Israel. Results. Contrary to conventional wisdom, we find considerable diversity in opinion among rabbis (if not public speech), particularly on issues concerning Israel and the peace process. Conclusions. We conclude that the Jewish community—really, several communities organized by movement—is hearing a diversity of opinions about the peace process. We argue that reference group theory and movement socialization help explain this diversity.