Universal versus contextual effects on TQM: a triangulation study using neural networks

The objective of this study is to extend previous research on total quality management (TQM)-context-performance relationships and ‘fit’ using multiple methods. We combine artificial neural networks (ANNs) with structural equation modelling (SEM) to analyse several hypotheses and propositions. This is the first study in this area of research that utilises ANNs and a triangulation technique in the presence of several contextual factors. The SEM analyses suggest that company size and industry type may have contingency effects on some of the TQM practices and/or TQM-performance relationships. However, the ANN models have shown that these two contingency factors do not moderate TQM outcomes, implying that all organisations can benefit from TQM regardless of size and type. As well, these models show that formal TQM implementation and/or ISO certifications do not add any predictive power to the ANN models except in one case: TQM implementation and/or ISO certification added to organisational effectiveness and customer results to predict financial and market (F&M) results. The results further indicate that even though implementing TQM alone has a bigger impact on F&M results than obtaining ISO certification alone, combining the two will have an even greater impact on these results. Joint implementation leads to greater improvements in organisational effectiveness, which, in turn, has a positive effect on customer results and consequently F&M results. This is a unique finding within the context of moderator effects on TQM-performance relationships.     

Mixed integer programming formulations for clustering problems related to structural balance

In this work, we study graph clustering problems associated with structural balance. One of these problems is known in computer science literature as the correlation-clustering (CC) problem and another (RCC) can be viewed as its relaxed version. The solution of CC and RCC problems has been previously used in the literature as tools for the evaluation of structural balance in a social network. Our aim is to solve these problems to optimality. We describe integer linear programming formulations for these problems which includes the first mathematical formulation for the RCC problem. We also discuss alternative models for the relaxed structural balance and the solution of clustering problems associated with these new models. Numerical experiments are carried out with each formulation on a set of benchmark instances available in the literature.     

Optimal Dynamic Upgrading in Revenue Management

We consider a revenue management problem involving a two compartment aircraft flying a single leg, with no cancellations or over‐booking. We apply the practice of transforming a choice revenue management model into an independent demand model. Within this assumed independent model, there are two sets of demands, business and economy, each with multiple fare class products. A business passenger can only be accepted into business. An economy passenger can be accepted into economy or upgraded into business. We define a two‐dimensional dynamic program (DP) and show that the value function is sub‐modular and concave in seat availability in the two compartments. Thus the bid prices are non‐decreasing with respect to these state variables. We use this result to propose an exact algorithm to solve the DP. Our numerical investigation suggests that in contrast to standard backward induction, our method could be included in production revenue management systems. Further, when the economy compartment is capacity constrained, we observe a substantial monetary benefit from optimal dynamic upgrading compared to the static upgrading procedures currently used in practice.     

Vygotsky’s Anomalous Spinozism

Abstract

This article exposes sources and influences of Spinoza in some of Vygotsky’s works, keeping in mind its meaning for the creation of a “new man” in Soviet Socialism. We try to understand the features of Vygotsky´s reading of Spinoza in an active dialogue with contemporary studies of 17th-century philosophy and its consequences for a materialist psychology. In this direction, we discuss references to Spinoza done by Vygotsky in the context of the latter’s argumentative style as well as studies of Engels, Plekhanov and Deborin as possible sources in Vygotsky´s approach to Spinoza. Paraphrasing Negri´s take on Spinoza as the “wild anomaly” of the 17th-century, we argue that Vygotsky performed an anomalous reading of Spinoza. In spite of the similarities with Deborin´s view of the modern philosopher, Vygotsky had plans that were more ambitious for Spinozist materialism and determinism. We trace the anomalous way in that the latter´s materialism reveals itself as one of randomness and contingency, against a rigidly structured projection of state, society, or model of human beings. We cannot figure out exactly which “model of man“ Vygotsky had in mind in his take on Spinoza, but we are able to recognize some core aspects in his reasoning. Roughly, these include the unity between mind and body, which can take the most diverse forms in the common body of multitude; the bases of consciousness in the affection; the integration, in the psychological systems, of affect, will, and desire; and the Spinozan ethics as a reference to life.     

The queen bee: A myth? The effect of top-level female leadership on subordinate females

We investigate the effect of female leadership on gender differences in public and private organizations. Female leadership impact was constructed using a quasi-experiment involving mayoral elections, and our research used a sample of 8.3 million organizations distributed over 5600 Brazilian municipalities. Our main results show that when municipalities in which a woman was elected leader (treatment group) are compared with municipalities in which a male was elected leader (control group) there was an increase in the number of top and middle female managers in public organizations. Two aspects contribute to the results: time and command/role model. The time effect is important because our results are obtained with reelected women – in their second term – and the command/role model (the queen bee phenomenon is either small, or non-existent) is important because of the institutional characteristics of public organizations: female leaders (mayor) have much asymmetrical power and decision-making discretion, i.e., she chooses the top managers. These top managers then choose middle managers influenced by female leadership (a role model). We obtained no significant results for private organizations. Our work contributes to the literature on leadership by addressing some specific issues: an empirical investigation with a causal effect between the variables (regression-discontinuity design – a non-parametric estimation), the importance of role models, and how the observed effects are time-dependent. Insofar as public organizations are concerned, the evidence from our large-scale study suggests that the queen bee phenomenon may be a myth; instead, of keeping subordinate women at bay, our results show that women leaders who are afforded much managerial discretion behave in a benevolent manner toward subordinate women. The term “Regal Leader” instead of “Queen Bee” is thus a more appropriate characterization of women in top positions of power.     

Domestic violence among male and female patients seeking emergency medical services

Gender differences among a cohort of injured patients seeking emergency medical services were examined with respect to their experiences as perpetrators and/or victims of domestic violence. Contextual issues, including violence initiation, emotional and behavioral responses to partner-initiated violence, and injury frequency and severity were analyzed. Women reported male partner-initiated violence more frequently than men reported female partner-initiated violence. Behavioral responses to partner initiated violence varied. Women were more likely to report using force back and to involve law enforcement. Women were more likely to be injured in a domestic assault over their lifetime, within the last year, and at the time of recruitment. Comparison of injury severity revealed that women reported higher rates of injuries than men in all possible severity categories. Women also reported experiencing more fear than men during partner-initiated violence, as well as being subjected to larger numbers of dominating and controlling behaviors, and greater intimidation secondary to their partner's size. Understanding contextual differences in partner violence for women and men has significant implications for policy development, identification, treatment, and referral of patients identified as living in violent relationships.     

Do Marriage Preparation Programs Really Work?: A Canadian Experiment*

This paper reports on the development, implementation, and evaluation of an innovative marriage preparation program. The program used a small discussion-group format, had pre- and post-wedding sessions, and emphasized the importance of communication patterns and conflict resolution. It was hypothesized (1) that spouses who took part in such a program would be less likely to engage in destructive conflict with each other than those who had not taken part; and, (2) that spouses who took part in the program would seek assistance in solving either individual or marital problems more readily than those who did not take part. The data supported both hypotheses.