The impact of internal communication on strategic and economic effects in Serbian companies

This paper presents the research results in relation to examining and defining dependences and the impact of internal communication on certain strategic and economic business effects. Serbian companies were the focus of this research. The data were collected by polling 100 managers from 100 companies. Afterwards, multivariate regression and correlation was carried out in the aim of the final determination of requested dependences. This research confirmed a strong positive relation between internal communication and strategic and economic business effects.     

The effect of sociodemographic (mis)match between interviewers and respondents on unit and item nonresponse in Belgium

Interviewer characteristics affect nonresponse and measurement errors in face-to-face surveys. Some studies have shown that mismatched sociodemographic characteristics – for example gender – affect people's behavior when interacting with an interviewer at the door and during the survey interview, resulting in more nonresponse. We investigate the effect of sociodemographic (mis)matching on nonresponse in two successive rounds of the European Social Survey in Belgium. As such, we replicate the analyses of the effect of (mis)matching gender and age on unit nonresponse on the one hand, and of gender, age and education level (mis)matching on item nonresponse on the other hand. Recurring effects of sociodemographic (mis)match are found for both unit and item nonresponse.     

Testing variance components in balanced linear growth curve models

It is well known that the testing of zero variance components is a non-standard problem since the null hypothesis is on the boundary of the parameter space. The usual asymptotic chi-square distribution of the likelihood ratio and score statistics under the null does not necessarily hold because of this null hypothesis. To circumvent this difficulty in balanced linear growth curve models, we introduce an appropriate test statistic and suggest a permutation procedure to approximate its finite-sample distribution. The proposed test alleviates the necessity of any distributional assumptions for the random effects and errors and can easily be applied for testing multiple variance components. Our simulation studies show that the proposed test has Type I error rate close to the nominal level. The power of the proposed test is also compared with the likelihood ratio test in the simulations. An application on data from an orthodontic study is presented and discussed.     

Teaching Black History after Obama

This article is a reflection on the teaching of black history after the Obama presidency and at the dawn of the Trump era. It is both an analysis of the state of the academic field and a primer on how to integrate the past few decades of scholarship in black history broadly across standard K-12 curriculum. It demonstrates the importance of theorizing black history as American history rather than just including African American content in US History courses and offers specific methods that can shift the narrative in this direction even within the confines of a more traditional telling of the American past. Finally, it situates the voluminous work of historians of the black past as critical interventions in pedagogy necessary to challenge today's unrelenting attacks on public education.     

Exotic Place,White Space: Racialized Volunteer Spaces in Honduras

In every year between 2004 and 2012, more than 800,000 Americans reported volunteering internationally (Lough 2013 ). These volunteers are overwhelmingly white (McBride and Lough 2008 ) and entering a largely nonwhite and developing world. This study starts by questioning how racial status informs volunteer/volunteer tourist interactions, both with locals and with other volunteers, in a global context. In‐depth interviews with 23 missionaries, teachers, and volunteers from the United States and Canada reveal that (1) international volunteering is largely motivated by romantic and exotic understandings of the Global South and (2) in spite of a stated interest in cultural immersion, participants’ notions of their whiteness guided their perceptions of Hondurans and their actions as they sought out and retreated to white spaces protected from Honduran influence. These findings further the work of those who have argued first world travelers have homogenized spaces on reserve, by demonstrating that whiteness can be the basis for the construction and maintenance of protected spaces in predominantly nonwhite countries.     

Access is not enough: the impact of emotional costs and self-efficacy on the changes in African-American students’ ICT use patterns

Previous research has examined the impact of computing interventions to reduce digital inequity. However, few studies focus on factors such as inequalities to material access, Internet use patterns, and affective or emotional anxiety. This paper investigates the potential role of emotional costs and computer self-efficacy in the connection between computer use at home and students’ computer use patterns. Data for this research come from pretest and posttest surveys administered to fourth- and fifth-grade African-American students. The results reveal that students’ home computer use is a significant predictor of the change in their information and entertainment usage over the course of the intervention. Students’ emotional costs partially mediate the relationship between home computer use and information-oriented usage over the intervention period. The findings suggest that providing students access to digital devices is not enough to close the digital divide.     

Exact and approximate distributions for linear contrasts of means and variances

A Bayesian analysis is presented for the K-group Behrens-Fisher problem. Both exact posterior distributions and approximations were developed for both a general linear contrast of the K means and the K variances, given either proper diffuse or informative conjugate priors. The contrast of variances is a unique feature of the heterogeneous variance model that enables investigators to test specific effects of experimental manipulations on variance. Finally, important-differences were observed between the heterogeneous variance model and the homogeneous model.     

影响体育系女生跨栏跑的因素及教法构思

针对跨栏跑的技术特点及教学特点,以及目前高校体育系女生实际具备的身体素质和技术能力,对影响其跨栏跑的因素作了分析,并提出了解决方法。     

On the existence of linear trend free block designs

We present a class of counerexamples for a conjecture on the existence or linear trend free block designs we will also prove a considerably weakened version of this conjecture which will determine all combinations of designs parmetres for which the class of linear trend free block designs is non empty.     

外商直接投资对民族地区经济的影响及对策

目前对于民族地区吸收FD I(外商直接投资),学界尚存在着许多错误看法,这些看法片面地夸大外国直接投资给民族地区带来的好处,低估甚至根本抹煞它对民族经济的负面影响。认为FD I对民族地区的经济发展只存在正面效应,因此主张越多越好。笔者认为,对于FD I对民族经济的影响应该从正、反两方面进行考察,应客观地剖析两大利益主体之间的博弈。