Nonstationary panel data analysis: an overview of some recent developments

This paper overviews some recent developments in panel data asymptotics, concentrating on the nonstationary panel case and gives a new result for models with individual effects. Underlying recent theory are asymptotics for multi-indexed processes in which both indexes may pass to infinity. We review some of the new limit theory that has been developed, show how it can be applied and give a new interpretation of individual effects in nonstationary panel data. Fundamental to the interpretation of much of the asymptotics is the concept of a panel regression coefficient which measures the long run average relation across a section of the panel. This concept is analogous to the statistical interpretation of the coefficient in a classical regression relation. A variety of nonstationary panel data models are discussed and the paper reviews the asymptotic properties of estimators in these various models. Some recent developments in panel unit root tests and stationary dynamic panel regression models are also reviewed.     

Computation of percentage points

In this note, it is proved that in computing percentage points of a distribution, Halley's method yields convergent solutions under most conditions, and we demonstrate the efficiency of the method with some examples.     

Simulating the average run length for cusum schemes using variance reduction techniques

Some variance reduction techniques utilizing the total hazard are developed to estimate the average run lengths of the cumulative sum charts through simulation when the process follows a general probability distribution. Particularly, we propose the hazard estimator and the cycle estimator. Simulation results are shown for the exponential case and these estimators are compared with the raw simulation estimator. Applicability to multivariate CUSUM schemes is briefly discussed in the conclusion.     

Complicated narratives of ‘Korean-ness’: towards strategic provisionality in parental involvement

The purpose of this paper is to advance the discourse on parental involvement drawing from Butlerian notion of strategic provisionality. In developing a new approach to understanding cultural differences and their relation to Korean parental involvement, the authors analyze qualitative and quantitative data from five New York metropolitan elementary schools. The authors examine the ways in which ‘Korean-ness’ and Korean parental involvement are discursively constructed and embodied in sociopolitical and historical contexts in the United States. We present two themes related to Korean parental involvement: (a) the double-edged component of respect for teachers and (b) biopolitics related to English language and parental involvement. By challenging normalized understanding about Korean-ness, the authors suggest a different approach to ethnoepistemology in order to enrich discourses concerning parental involvement and ethnic/racial studies.     

Medicare and health care reform

Although Medicare constitutes one of the most popular programs of the federal government, even its most ardent supporters would likely agree that improvements could be made and likely should be part of any package of comprehensive health care reform. While some changes could be made as stand-alone reforms, it would be better to integrate changes for the under 65-population with those for the Medicare program. For example, cost-containment strategies would work best if they applied to the population as a whole rather than creating differences that lead to cost-shifting and possible discrimination across groups. The generosity of services covered also ought to be balanced between Medicare and whatever happens elsewhere. This would allow Medicare's cost-sharing structure to be less severe in terms of hospital and skilled nursing care, for example. Finally, while it is tempting to use reductions in spending on Medicare as a means for helping to finance other expansions, the impact of such changes needs to be carefully assessed before assuming that they would create no lasting problems. This essay examines some of the options and likely consequences for Medicare as part of comprehensive health reform.     

Linear Regression Limit Theory for Nonstationary Panel Data

This paper develops a regression limit theory for nonstationary panel data with large numbers of cross section (n) and time series (T) observations. The limit theory allows for both sequential limits, wherein T→∞ followed by n→∞, and joint limits where T, n→∞ simultaneously; and the relationship between these multidimensional limits is explored. The panel structures considered allow for no time series cointegration, heterogeneous cointegration, homogeneous cointegration, and near-homogeneous cointegration. The paper explores the existence of long-run average relations between integrated panel vectors when there is no individual time series cointegration and when there is heterogeneous cointegration. These relations are parameterized in terms of the matrix regression coefficient of the long-run average covariance matrix. In the case of homogeneous and near homogeneous cointegrating panels, a panel fully modified regression estimator is developed and studied. The limit theory enables us to test hypotheses about the long run average parameters both within and between subgroups of the full population.     

“Involved in something (involucrado en algo)”: Denial and stigmatization in Mexico’s “war on drugs”

This article responds empirically to the question posed by Stan Cohen about “why, when faced by knowledge of others’ suffering and pain—particularly the suffering and pain resulting from what are called ‘human rights violations’—does ‘reaction’ so often take the form of denial, avoidance, passivity, indifference, rationalisation or collusion?”. Our context is Mexico's “war on drugs.” Since 2006 this “war” has claimed the lives of around 240,000 Mexican citizens and disappeared around 60,000 others. Perpetrators include organized criminal gangs and state security services. Violence is pervasive and widely reported. Most people are at risk. Our study is based on qualitative interviews and focus groups involving 68 “ordinary Mexicans” living in five different Mexican cities which have varying levels of violence. It investigates participant proximity to the victims and the psychological defense mechanisms they deploy to cope with proximity to the violence. We found that 62 of our participants knew, directly or indirectly, one or more people who had been affected. We also found one dominant rationalization (defense mechanism) for the violence: that the victims were “involved in something” (drugs or organized crime) and therefore “deserved their fate.” This echoes prevailing state discourses about the violence. We argue that the discourse of “involved” is a discourse of denial that plays three prominent roles in a highly violent society in which almost no-one is immune: it masks state violence, stigmatizes the victims, and sanctions bystander passivity. As such, we show how official and individual denial converge, live, and reproduce, and play a powerful role in the perpetuation of violence.     

Solutions to the Challenge of Meeting Rural Transportation Needs: Middle-Aged and Older Adults’ Perspectives

This study aimed to explore how the aging population in Appalachia manages its transportation and plans for the transition to non-driving and to seek possible solutions to the challenge of meeting rural transportation needs. Four focus groups (N = 38) were conducted, supplemented by a questionnaire, in Appalachian Kentucky. The results showed that few alternative transportation existed except a local paratransit service and informal transportation support. Compared to older adults, middle-aged adults reported a greater willingness to use mobile phones and the Internet to arrange transportation if they were available. Participants also recommended expanding the use of existing transportation in the community – such as church vans – to better meet the aging population’s needs. The findings suggest that partnership between government, non-profit, and private sectors is needed, not solely focusing on a tax-dependent solution. Additionally, information and communication technology-based transportation management system would help maximize the use of scare but existing resources in rural areas.     

Social Workers' Perceptions of Training Preparedness and Social Justice Norms on Workplace Empowerment

This study examined the relationship between (a) social workers' perceptions of preparedness to perform in their professional roles and perceived social justice behaviors at work and (b) workers' sense of workplace empowerment. A sample of 152 currently licensed social workers responded to web or mailed surveys. Respondents were more likely to perceive having workplace empowerment related to meaning in their work if they reported their social work program training prepared them for their professional roles. Perceived social justice behaviors at work were associated with workers' experiencing empowerment related to the impact they had at work. Social workers' sense of training preparedness and experiencing social justice at work can positively influence workers' perceived empowerment. Enforcing the importance of engaging in social justice with clients in social work education, both in class and in field placements, has the potential for long-lasting effects on empowerment in students' future workplaces. Agency-level management should ensure continuity in social justice activities to enhance feelings of workplace empowerment, which may help social workers connect with clients. Future research should examine elements of social work programs that promote feelings of empowerment in order to understand how the same approach can be used in models of continuing education and organizational management.