Two-dimensional Kolmogorov-type goodness-of-fit tests based on characterisations and their asymptotic efficiencies

In this paper, new two-dimensional goodness-of-fit tests are proposed. They are of supremum type and are based on two different types of characterisations. The first type are those that involve functional equations that the distribution function satisfies, while the second type uses independence of some statistics. The asymptotics of the statistics is studied and Bahadur efficiencies of the tests against some close alternatives are calculated. In the process, a theorem on large deviations of Kolmogorov-type statistics has been extended to the multidimensional case.     

The internalising and externalising problems of adolescents in Croatia: Socio‐demographic and family victimisation factors

This study assessed Croatian adolescents' problems in relation to socio‐demographic characteristics and experienced family violence in early and late adolescence. A national representative sample of 1,780 Croatian students (45.3% males) in two age groups representing early (M = 13.20; SD = 0.42) and late adolescence (M = 18.14; SD = 0.38) participated. The questionnaire included the Youth Self‐Report, modified version of ISPCAN Child Abuse Screening Tool – Children's Version, and socio‐demographic data. Results show that internalising problems were more present in female adolescents, in adolescents who perceived family financial hardship and in those whose biological parents did not live together. More externalising problems were reported in late adolescence by students who were living in large cities and whose families had either low, or above‐average, financial status. Adolescents who have experienced family violence were at higher risk of developing internalising and/or externalising problems.     

Leadership as social identity management: Introducing the Identity Leadership Inventory (ILI) to assess and validate a four-dimensional model

Although nearly two decades of research have provided support for the social identity approach to leadership, most previous work has focused on leaders' identity prototypicality while neglecting the assessment of other equally important dimensions of social identity management. However, recent theoretical developments have argued that in order to mobilize and direct followers' energies, leaders need not only to ‘be one of us’ (identity prototypicality), but also to ‘do it for us’ (identity advancement), to ‘craft a sense of us’ (identity entrepreneurship), and to ‘embed a sense of us’ (identity impresarioship). In the present research we develop and validate an Identity Leadership Inventory (ILI) that assesses these dimensions in different contexts and with diverse samples from the US, China, and Belgium. Study 1 demonstrates that the scale has content validity such that the items meaningfully differentiate between the four dimensions. Studies 2, 3, and 4 provide evidence for the scale's construct validity (distinguishing between dimensions), discriminant validity (distinguishing identity leadership from authentic leadership, leaders' charisma, and perceived leader quality), and criterion validity (relating the ILI to key leadership outcomes). We conclude that by assessing multiple facets of leaders' social identity management the ILI has significant utility for both theory and practice.     

Realizations of the game domination number

Domination game is a game on a finite graph which includes two players. First player, Dominator, tries to dominate a graph in as few moves as possible; meanwhile the second player, Staller, tries to hold him back and delay the end of the game as long as she can. In each move at least one additional vertex has to be dominated. The number of all moves in the game in which Dominator makes the first move and both players play optimally is called the game domination number and is denoted by \(\gamma _g\) . The total number of moves in a Staller-start game is denoted by \(\gamma _g^{\prime }\) . It is known that \(|\gamma _g(G)-\gamma _g^{\prime }(G)|\le 1\) for any graph \(G\) . Graph \(G\) realizes a pair \((k,l)\) if \(\gamma _g(G)=k\) and \(\gamma _g^{\prime }(G)=l\) . It is shown that pairs \((2k,2k-1)\) for all \(k\ge 2\) can be realized by a family of 2-connected graphs. We also present 2-connected classes which realize pairs \((k,k)\) and \((k,k+1)\) . Exact game domination number for combs and 1-connected realization of the pair \((2k+1,2k)\) are also given.     

Unrecognised Cosmopolitans: Mobility and Openness Among Globally Engaged Family Farmers

In contemporary cosmopolitanism research, cities are iconic places where cosmopolitan exchanges and actors find their ‘natural’ milieu. Farmers not only are remarkably absent from this literature but have been depicted as operating with a highly localist and agrarian world view and being strongly connected to the land and the farm through history, biography and family tradition. In this paper, we present findings from a three-year study of entrepreneurial family farmers who are globally engaged and undertake extensive mobility as part of their farm business practices. The paper shows how they readily display some of the key hallmarks of contemporary cosmopolitanism: they are highly mobile and frequently engage in the routineness of international travel; they understand the strategic significance of cultural sensitivities and competencies; and they gain pleasure from engaging with difference. Yet, we suggest that these expressions of cosmopolitanism are also contradictory and, at times, may be understood as either ‘instrumental’, ‘banal’ or ‘engaged’. The paper illustrates how ordinary and everyday cosmopolitan repertoires and sentiments can arise outside the usual settings and among actors not readily acknowledged in the cosmopolitanism literature.     

Hybridity,ethnicity and nationhood: legacies of interethnic war,wartime rape and the potential for bridging the ethnic divide in post-conflict Bosnia and Herzegovina

ABSTRACT

Relying on the biographical narrative Leila, a girl from Bosnia and the recorded narratives by adolescents born of wartime rape in Bosnia and Herzegovina we illustrate the difficulties and symbolic implications associated with negotiating hybrid identities in post-conflict Bosnia and Herzegovina against the dominant post-conflict discourse based on ‘pure’ ethnicities. We argue that in today’s Bosnia and Herzegovina, hybrid identities are marginalized by official politics and societal structures as a legacy of the war. However, they simultaneously embody the symbolic tools through which ethnic divisions could be overcome, envisioning and recalling a multi-ethnic Bosnia and Herzegovina as a supra-national designation.     

The nature of bank money,a case study of transformation in the Czech banking sector

The article examines the nature of bank money on two complementary levels. The first level deals with theoretical considerations. Here, the departure point is Social Positioning Theory, which provides a framework to investigate the nature of money. Within the theory, the paper situates bank money in credit-debt relations, that are themselves integral part of a wider productive-consumptive nexus of the economy. In this perspective, bank money is the relation, accounting economic positions of participating members, resulting from their economic activities realized within the context of the overall society. The second level uses the methods of Oral History and Memory Studies and, through semi-structured interviews, provides empirical material illustrating ideas about the nature of money in a specific historical form. The article thus explores the contrasting experiences of banking in the context of a centrally planned economy and banking in the transformation to a market economy. These two contrasting episodes are illustrative because of the significant change in the form of bank money, which brings to light various aspects of its nature. Moreover, the article utilizes interviews that present the lived experience of bankers with years of involvement in the sector, enriching the perspective on the issue under study.     

Bootstrap Procedures for Online Monitoring of Changes in Autoregressive Models

We compare the behavior of several bootstrap procedures for monitoring changes in the error distribution of autoregressive time series. The proposed procedures are designed to control the overall significance level and include classical tests based on the empirical distribution function as well as Fourier-type methods that utilize the empirical characteristic function, both functions being computed on the basis of properly estimated residuals. The Monte Carlo study incorporates different estimators and a variety of sampling situations with and without outliers.     

Estimating a uniform distribution when data are measured with a normal additive error with unknown variance

The problem of estimating the width of a symmetric uniform distribution on the line together with the error variance, when data are measured with normal additive error, is considered. The main purpose is to analyse the maximum-likelihood (ML) estimator and to compare it with the moment-method estimator. It is shown that this two-parameter model is regular so that the ML estimator is asymptotically efficient. Necessary and sufficient conditions are given for the existence of the ML estimator. As numerical problems are known to frequently occur while computing the ML estimator in this model, useful suggestions for computing the ML estimator are also given.