Estimation of variance components in an unbalanced one-way classification

In the unbalanced one-way random effects model the weighted least squares approach with estimated weights is used to develop a relatively simple estimator of variance components. As the number of classes increases, the proposed estimator is seen not only to be best asymptotically normal but also to be asymptotically equivalent to the maximum likelihood estimator.     

Nonlinear Autoregression with Positive Innovations

Use of nonlinear models in analyzing time series data is becoming increasingly popular. This paper considers a broad class of nonlinear autoregressive models where the autoregressive part is additive and the terms are nonlinear functions of the past data. Also, the innovation distribution is supported on the non-negative reals and satisfies a tail regularity condition. The linear parameters of the autoregression are estimated using a linear programming recipe which yields much more accurate estimates than traditional methods such as conditional least squares. Limiting distribution of the linear programming estimators is obtained. Simulation studies validate the asymptotic results and reveal excellent small sample properties of the LPE estimator.     

Comparing waiting times in a multi-stage model: A log-rank approach

A proper log-rank test for comparing two waiting (i.e. sojourn, gap) times under right censored data has been absent in the survival literature. The classical log-rank test provides a biased comparison even under independent right censoring since the censoring induced on the time since state entry depends on the entry time unless the hazards are semi-Markov. We develop test statistics for comparing K waiting time distributions from a multi-stage model in which censoring and waiting times may be dependent upon the transition history in the multi-stage model. To account for such dependent censoring, the proposed test statistics utilize an inverse probability of censoring weighted (IPCW) approach previously employed to define estimators for the cumulative hazard and survival function for waiting times in multi-stage models. We develop the test statistics as analogues to K-sample log-rank statistics for failure time data, and weak convergence to a Gaussian limit is demonstrated. A simulation study demonstrates the appropriateness of the test statistics in designs that violate typical independence assumptions for multi-stage models, under which naive test statistics for failure time data perform poorly, and illustrates the superiority of the test under proportional hazards alternatives to a Mann–Whitney type test. We apply the test statistics to an existing data set of burn patients.     

Generalized confounded row–column designs

Generalized Confounded Row–Column (GCRC) designs for factorial experiments have been introduced and methods of constructing GCRC designs have been discussed. Fractionally replicated GCRC designs have also been constructed. The designs obtained ensure balancing with respect to estimable effects.     

PERSPECTIVE ARTICLE: The impact of Nordic countries’ family friendly policies on employment,wages, and children

The Nordic countries at the same time exhibit a remarkably high participation rate of mothers and a more moderate decline in fertility rates compared to other Western countries. This has been attributed to the fact that the welfare state model and, especially, the family friendly policies chosen in the Nordic countries are unique. In this paper we evaluate the impact of Nordic countries’ family friendly policies on employment, wages and children’s well-being. We demonstrate that, although the ‘Nordic model’ has been successful in boosting female employment, it is a costly solution. Furthermore, family-friendly policies mainly directed towards giving mothers the right to be on long paid maternal leave have adverse effects on women’s wages with consequences for gender equality. Indeed, extensive family-friendly schemes may even have created a ‘system-based glass ceiling’ hindering women’s career progression. There is no evidence however of a trade-off between family-friendly policies and family welfare as effects on child development and children’s well-being of publicly provided child-care are found to be modest or even positive.

Corporate Reputation: Do Board Characteristics Matter?

Our study draws on institutional and signalling theories to postulate relationships between board characteristics and corporate reputation. Based on a sample of 324 firms featured in Fortune's list of most admired corporations in the USA, our findings indicate that board characteristics significantly influence the assessment of firm reputation by the business community. Specifically, we found that firms with a greater proportion of outside directors and those with larger boards exhibited better reputation than those with smaller boards and a higher proportion of insiders. In addition, we observed an inverted‐U relationship between the average tenure of outside directors and corporate reputation. However, contrary to expectations, our findings indicate a negative association between independent leadership structure (i.e. absence of duality) and corporate reputation.     

Maternal Health Care Services in the Himalayas

ABSTRACT

The state of health of the people in developing countries does not show a very good trend. They are faced with the double burden of communicable and noncommunicable diseases as well as other sociocultural factors that need to be addressed, especially in rural areas. The present study was conducted in a rural area with the dual purpose of training the undergraduate medical student in the field and exposing or sensitizing them toward the need of the rural masses and provision of services in the form of medical aid or health education and awareness. It was a camp-based approach where an intense phase was planned for a week and a follow-up phase every month. The present article is the result of the week-long intense phase. The intensive phase is basically the period when this camp was run for 7 days with the involvement of specialists from various departments providing their services. In the next phase there were follow-up activities and services that were provided once a month. The study generated an interest in the students, and they are very keen for the follow-up visits. Because the students were allotted families, the whole village was covered and health awareness was generated, which created demand. This demand was met given the number of patients attending the clinics, of which 57% were females. Furthermore, 77% of the patients reported that they were fully satisfied with the services being provided.     

Participatory action research and researcher’s responsibilities: an experience with an Indigenous community

This paper seeks to explore the relational participatory action research (PAR) frameworks that have been developed to allow non-Indigenous researchers, along with Indigenous co-researcher participants, to learn and honour Indigenous stories. Specifically, in the context of PAR research in the Chittagong Hill Tracts of Bangladesh, we outline: (a) potential challenges between Indigenous research paradigms and Western research paradigms, (b) the situation of the non-Indigenous researcher in relation to the Indigenous community, (c) challenges associated with the non-Indigenous researcher’s selection of a research site, (d) collaboration throughout the research process and (e) the processes of developing and maintaining responsibilities. The aim is not to offer simple answers to such challenges, but to highlight the manner in which such processes can be addressed. This research may provide practical insight for future non-Indigenous researchers working with Indigenous communities through a participatory sharing process with Indigenous co-researcher participants, Elders, leaders, knowledge-holders and youths.     

Managers' Perceptual Errors Revisited: the Role of Knowledge Calibration

Insights from the stream of research on knowledge calibration, which refers to the correspondence between accuracy and confidence in knowledge, enable a better understanding of consequences of inaccurate perceptions of managers. This paper examines the consequences of inaccurate managerial knowledge through the lens of knowledge calibration. Specifically, the paper examines the antecedent role of miscalibration of knowledge in strategy formation. It is postulated that miscalibrated managers who overestimate external factors and display a high level of confidence in their estimates are likely to enact strategies that are relatively more evolutionary and incremental in nature, whereas miscalibrated managers who overestimate internal factors and display a high level of confidence in their estimates are likely to enact strategies that are relatively more discontinuous and disruptive in nature. Perspectives from social cognitive theory provide support for the underlying processes. The paper, in part, explains the paradox of the prevalence of inaccurate managerial perceptions and efficacious performance. It also advances the literature on strategy formation through the application of the construct of knowledge calibration.     

Do Parent Units Benefit from Reverse Knowledge Transfer?

Emerging market multinationals resort to knowledge acquisitions from their overseas subsidiaries to springboard and realize their global ambitions. Drawing from the knowledge‐based view and social capital perspective, this study explores the effects of organizational collaboration and tacitness on multiple dimensions of reverse knowledge transfer (RKT). Data were collected through a survey, from senior and middle level managers of parent Indian multinationals, pertaining to RKT from their overseas subsidiaries. The hypotheses are analysed using partial least squares modelling. The results demonstrate positive effects between the extent and benefits of RKT. Collaboration was found to have a positive influence on both dimensions of RKT. Tacitness also has a positive impact on the benefits from RKT. The implications of the findings and the limitations of the study are discussed along with suggestions for future research.