Economic Liberalization and the Antecedents of Top Management Teams: Evidence From Turkish ‘Big’ Business

There has been an increased interest in the last two decades in top management teams (TMTs) of business firms. Much of the research, however, has been US‐based and concerned primarily with TMT effects on organizational outcomes. The present study aims to expand this literature by examining the antecedents of top team composition in the context of macro‐level economic change in a late‐industrializing country. The post‐1980 trade and market reforms in Turkey provided the empirical setting. Drawing upon the literatures on TMT and chief executive characteristics together with punctuated equilibrium models of change and institutional theory, the article develops the argument that which firm‐level factors affect which attributes of TMT formations varies across the early and late stages of economic liberalization. Results of the empirical investigation of 71 of the largest industrial firms in Turkey broadly supported the hypotheses derived from this premise. In the early stages of economic liberalization the average age and average organizational tenure of TMTs were related to the export orientation of firms, whereas in later stages, firm performance became a major predictor of these team attributes. Educational background characteristics of teams appeared to be under stronger institutional pressures, altering in different ways in the face of macro‐level change.     

Multiple facility location on a network with linear reliability order of edges

We study the problem of locating facilities on the nodes of a network to maximize the expected demand serviced. The edges of the input graph are subject to random failure due to a disruptive event. We consider a special type of failure correlation. The edge dependency model assumes that the failure of a more reliable edge implies the failure of all less reliable ones. Under this dependency model called Linear Reliability Order (LRO) we give two polynomial time exact algorithms. When two distinct LRO’s exist, we prove the total unimodularity of a linear programming formulation. In addition, we show that minimizing the sum of facility opening costs and expected cost of unserviced demand under two orderings reduces to a matching problem. We prove NP-hardness of the three orderings case and show that the problem with an arbitrary number of orderings generalizes the deterministic maximum coverage problem. When a demand point can be covered only if a facility exists within a distance limit, we show that the problem is NP-hard even for a single ordering.     

Robust portfolio planning in the presence of market anomalies

In this study, a short-term portfolio modeling formulation is developed using existing anomalies as a single determinant for daily Istanbul Stock Exchange National 100 Composite Index (ISE) and US dollars (USD) returns in a Robust optimization (RO) framework. Using anomalies in planning within an RO framework establishes a balance between risk seeking and risk averse behaviors, as generating profit from anomalies is risky and RO enables to settle down the extreme risk seeking behavior. Applications of the model using various data sets result in real profit generation such that terminal wealth figures increase considerably more than Wholesale Price Index (WPI). This study demonstrates that RO is a viable approach to make use of anomaly information for short-term profits.     

Robust pairwise multiple comparisons under short-tailed symmetric distributions

In one-way ANOVA, most of the pairwise multiple comparison procedures depend on normality assumption of errors. In practice, errors have non-normal distributions so frequently. Therefore, it is very important to develop robust estimators of location and the associated variance under non-normality. In this paper, we consider the estimation of one-way ANOVA model parameters to make pairwise multiple comparisons under short-tailed symmetric (STS) distribution. The classical least squares method is neither efficient nor robust and maximum likelihood estimation technique is problematic in this situation. Modified maximum likelihood (MML) estimation technique gives the opportunity to estimate model parameters in closed forms under non-normal distributions. Hence, the use of MML estimators in the test statistic is proposed for pairwise multiple comparisons under STS distribution. The efficiency and power comparisons of the test statistic based on sample mean, trimmed mean, wave and MML estimators are given and the robustness of the test obtained using these estimators under plausible alternatives and inlier model are examined. It is demonstrated that the test statistic based on MML estimators is efficient and robust and the corresponding test is more powerful and having smallest Type I error.     

Temperament moderates the effects of early deprivation on infant attention

Institutional care has been shown to increase the risk of attention problems in children, but some children are more sensitive to their environment, both for better and for worse. With this in mind, the current study examined the moderating role of temperament (falling reactivity) between early adversity and attention skills. Six- to 15-month-old infants residing in institutions (n = 63) and infants reared by their biological families from low socioeconomic environments (n = 59) were recruited. The infants’ attention skills were measured by calculating the length of time they spent looking at toys. The infants’ temperaments were measured by a subscale of the Infant Behavior Questionnaire (falling reactivity/rate of recovery from distress). The findings were in line with the differential susceptibility theory. Compared to infants with high levels of falling reactivity, infants with lower levels of falling reactivity had better attention skills if they were in a family group, but they had lower attention skills if they were residing in institutions. The attention skills of the infants who had higher scores for falling reactivity did not appear to be affected by the adverse environment.     

Multimodal hub location and hub network design

Through observations from real life hub networks, we introduce the multimodal hub location and hub network design problem. We approach the hub location problem from a network design perspective. In addition to the location and allocation decisions, we also study the decision on how the hub networks with different possible transportation modes must be designed. In this multimodal hub location and hub network design problem, we jointly consider transportation costs and travel times, which are studied separately in most hub location problems presented in the literature. We allow different transportation modes between hubs and different types of service time promises between origin–destination pairs while designing the hub network in the multimodal problem. We first propose a linear mixed integer programming model for this problem and then derive variants of the problem that might arise in certain applications. The models are enhanced via a set of effective valid inequalities and an efficient heuristic is developed. Computational analyses are presented on the various instances from the Turkish network and CAB data set.     

Life Satisfaction and Happiness in Turkey

This research aims to investigate life satisfaction and happiness in Turkey. It extends the previous researches on subjective well-being (SWB) for Turkey by considering both happiness and life satisfaction. The previous researches for Turkey are local studies, and their findings cannot be generalized to the population of Turkish society. Given these facts, the factors that shape individual happiness and life satisfaction amongst Turkish people are determined using a representative survey of sociocultural and political change, World Values Survey (WVS). Some results obtained in this study are similar to typical findings such as a negative age effect, positive influences of income and health status, and a negative effect of unemployment. Contrary to the expectations, middle education has a negative direct effect on life satisfaction among females, and the upper education level is insignificant in the life satisfaction model. By comparing the correlates of happiness and life satisfaction across different years, this research aims to provide insights for policy makers and professionals to improve the perceived lives of Turkish people.

Social supports preferred by the teachers when facing school violence

Objectives

This study aims at examining whether the social support sources of teachers differ depending on the variables of gender and seniority when they encounter violence at school and investigating their opinions on precautions against school violence.

Methods

Data was collected via a questionnaire from a sample of 179 female and 166 male Turkish teachers. Chi-square and Mann-Whitney U tests were used for data analysis.Results: Male and female teachers preferred to share the experience of exposure to verbal (χ² (5) = 22.81, p < .01), physical (χ² (5) = 36.64, p < .01), emotional (χ² (5) = 26.13, p < .01) and sexual violence (χ² (5) = 37.43, p < .01) at school with different social support sources. Male teachers preferred their colleagues as social support sources whereas female teachers preferred their spouses/families. Social support sources which teachers prefer when they face any type of violence other than sexual violence differ due to the length of teaching experience. School administrators and counselors are not among the social support sources of teachers when they were exposed to violence.

Conclusions

Turkish teachers' preferences related to their victimization experiences indicate a need for prevention program encompassing teachers, school counselors and administrators.     

Analyses of Child Sex Abuse Cases in Turkey: A Provincial Case

Sexual abuse is a significant problem, especially for children, but only a limited number of sexual abuse cases involving children are reported to the relevant authorities. One hundred and fifty files recorded in the National Judiciary Information System between 2006–2012 relating to cases of child sexual abuse and considered to be within the scope of Offences Against Sexual Integrity pertaining to Turkish Penal Code were analyzed for this research. Statements of the victims, defendants, and witnesses, together with the minutes issued by law enforcement officers, hospital or forensic reports, and arrest warrants were used to collect data. The average values and percentage test analysis were used to assess data. A large portion of the sexually abused children were determined to be between 14 and 17 years of age, female, and had been abused before, while a majority of the abusers were between 19 and 25 years of age, and all of the abusers identified as male. Most of the cases of abuse were planned and carried out under threat, and a certain number of such crimes resulted in pregnancy, were repeated systematically, and became evident when the mothers of the abused children found out or when a pregnant child was referred to a hospital for childbirth. The sexual abuse of children is a significant problem for Turkish society, just as it is for other societies, and it is recommended that further research be conducted with a broader scope in order to present this issue more clearly and to develop solutions.