TEACHING THE PRODUCTION/OPERATIONS MANAGEMENT CORE COURSE: INTEGRATING LOGISTICS PLANNING ACTIVITIES

This paper discusses the benefits of restructuring the introductory undergraduate production and operations management (pom) course to improve its pedagogical effectiveness and to better convey the importance of integrating logistics planning activities. The introduction of a dynamic integrative semester-long case study which involves students in applying pom concepts and tools through a simulation game is reported.     

Attitudes and beliefs about mental health among African American older adults suffering from depression

Depression among older adults is a major public health concern leading to increased disability and mortality. Less than 3% of older adults utilize professional mental health services for the treatment of depression, less than any other adult age group. And despite similar rates of depression, African Americans are significantly less likely to seek, engage and be retained in professional mental health services than their white counterparts. Cultural differences in the way depression symptoms are manifested, defined, interpreted and labeled may in part explain some of these racial differences in help-seeking behaviors. Focus group methodology was utilized to identify and explore attitudes and beliefs about depression and mental health treatment utilization among 42 older African Americans who had recently suffered a major depressive episode. Thematic analysis of identified six overarching themes: (a) perceptions of depression, (b) the African American experience, (c) seeking treatment as a last resort, (d) myths about treatment, (e) stigma associated with seeking treatment and (f) culturally appropriate coping strategies. We discuss implications for practice, education and research.     

The identity curation game: digital inequality,identity work,and emotion management

ABSTRACT

The research examines an understudied facet of digital inequality: how digital inequality impacts identity work and emotion management. The analysis reveals how unequal access to digital resources shapes how well youths are able to play what I call the identity curation game. Digital resources determine youths’ ability to succeed in this game that is governed by three implicit rules: (1) constantly update or be sidelined, (2) engage in constant reciprocated identity-affirming interactions, and (3) maintain a strategy of vigilance to remove traces of failed identity performances. This article draws on Symbolic Interactionism and pays particular attention to Hochschild’s theory of emotion management. Drawing on these frameworks, the findings reveal how under-resourced youths experience connectivity gaps that disrupt their ability to play the identity curation game, as well as the resulting emotional consequences. Under-resourced youths manage distinctive negative emotions arising from connectivity gaps that hinder their digital identity work, as well as engaging in distinct kinds of suppressive work to police their own emotions including longing, envy, shame, frustration, and stigmatization. In making these linkages, the research reveals the cascading effects of digital inequality among youths where constant connectivity is the sine qua non of social inclusion.     

Collective memory: September 11th now and then

In the new millennium, newspapers in Brazil, France, and the United States have transformed their digital editions to facilitate reader participation and exchange. This research explores how these venues were used by readers to discuss 9/11/01. Over ten years have passed since September 11, 2001 in which the events have been interpreted and reinterpreted over time. Drawing data from 2001 and 2011, the analysis compares immediate understandings of the events with similar commentary on the anniversary a decade later. The data are drawn from three internationally recognized newspapers: O Estado de São Paulo, Le Monde, and The New York Times. This study examines differing interpretations of the events from both longitudinal and comparative cultural perspectives. Using a comparative case study approach, the research explores how Brazilian, French, and Americans congregate in digital spaces to debate September 11th in 2001 and again in 2011. In comparing the discourse in each forum, the study identifies commonalities and differences across the three case studies. The work explores how ideological discourse is used in the immediate aftermath of 9/11/01 and ten years later in 2011. In so doing, the work sheds light on the stability and enduring nature of identity work and identity categories in digital discourse fora.     

Cointegration in Fractional Systems with Unknown Integration Orders

Cointegrated bivariate nonstationary time series are considered in a fractional context, without allowance for deterministic trends. Both the observable series and the cointegrating error can be fractional processes. The familiar situation in which the respective integration orders are 1 and 0 is nested, but these values have typically been assumed known. We allow one or more of them to be unknown real values, in which case Robinson and Marinucci (2001, 2003) have justified least squares estimates of the cointegrating vector, as well as narrow‐band frequency‐domain estimates, which may be less biased. While consistent, these estimates do not always have optimal convergence rates, and they have nonstandard limit distributional behavior. We consider estimates formulated in the frequency domain, that consequently allow for a wide variety of (parametric) autocorrelation in the short memory input series, as well as time‐domain estimates based on autoregressive transformation. Both can be interpreted as approximating generalized least squares and Gaussian maximum likelihood estimates. The estimates share the same limiting distribution, having mixed normal asymptotics (yielding Wald test statistics with χ² null limit distributions), irrespective of whether the integration orders are known or unknown, subject in the latter case to their estimation with adequate rates of convergence. The parameters describing the short memory stationary input series are √n‐consistently estimable, but the assumptions imposed on these series are much more general than ones of autoregressive moving average type. A Monte Carlo study of finite‐sample performance is included.     

The benefits and costs of U.S. employer COVID-19 vaccine mandates

In 2021, the Biden Administration issued mandates requiring COVID-19 vaccinations for U.S. federal employees and contractors and for some healthcare and private sector workers. These mandates have been challenged in court; some have been halted or delayed. However, their costs and benefits have not been rigorously appraised. This study helps fill that gap. We estimate the direct costs and health-related benefits that would have accrued if these vaccination requirements had been implemented as intended. Compared with the January 2022 vaccination rates, we find that the mandates could have led to 15 million additional vaccinated individuals, increasing the overall proportion of the fully vaccinated U.S. population from 64% to 68%. The associated net benefits depend on the subsequent evolution of the pandemic—information unavailable ex ante to analysts or policymakers. In scenarios involving the emergence of a novel, more transmissible variant, against which vaccination and previous infection offer moderate protection, the estimated net benefits are potentially large. They reach almost $20,000 per additional vaccinated individual, with more than 20,000 total deaths averted over the 6-month period assessed. In scenarios involving a fading pandemic, existing vaccination-acquired or infection-acquired immunity provides sufficient protection, and the mandates’ benefits are unlikely to exceed their costs. Thus, mandates may be most useful when the consequences of inaction are catastrophic. However, we do not compare the effects of mandates with alternative policies for increasing vaccination rates or for promoting other protective measures, which may receive stronger public support and be less likely to be overturned by litigation.     

A Comparative Study of Arm‐Restraint Methodology: Differential Effects of Mother and Stranger Restrainers on Infants' Distress Reactivity at 6 and 9 Months of Age

This study examined both differential patterns and the stability of infants' (N = 70) distress reactivity across mother and stranger arm‐restraint conditions when infants were 6 and 9 months of age. Reactivity measures included observational variables for the rise, intensity, and duration of infant distress as well as motor activities associated with escape behaviors. Correlation analyses revealed that infant behaviors during arm restraint were modestly stable across conditions and over time; however, mean comparisons also showed that infants' distress responses appear to be sensitive to protocol parameters (whether restrainer is mother or stranger). At 6 months of age, infants cried more during maternal restraint than with strangers and exhibited escape behaviors more frequently with mothers. Findings further indicate that infants' distress reactivity undergoes developmental alterations from 6 to 9 months of age, with infants crying more quickly, reaching peak intensity of distress faster, and displaying more distress at 9 months compared to 6 months. These changes in infants' reactivity were particularly accentuated during maternal compared to stranger restraint conditions at 9 months of age.     

The educational attainment of young women: Role model effects of female high school faculty

To test for the presence of role model effects of female high school faculty and professional staff on young women in high school, we estimate several models of educational attainment for young women using data from the National Longitudinal Survey of Youth. Exposure to female high school faculty and professional staff has a positive impact on the educational attainment of young women. This result, combined with our finding that female faculty and professional staff have no significant impact on the educational attainment of young men, supports a female role model hypothesis.