The periodogram regression:correction and comments

Ratios of periodogram and spectral density at different harmonic frequencies are independent if the frequency zero is approached slowly enough. This is an asymptotically relevant condition for the periodogram regression to work with fractionally integrated series. In finite samples, however, this theoretical condition should be ignored as we illustrate experimentally.     

Maternal and Child Anxiety: Do Attachment Beliefs or Children's Perceptions of Maternal Control Mediate Their Association?

This study tested a model of the association between maternal and child anxiety that views mother and child attachment beliefs and children's perceptions of maternal control as mediators of the association. The study was conducted with mothers and their children aged 6 to 17 (N = 88). Maternal anxiety was significantly associated with child anxiety and maternal anxious attachment beliefs, whereas child anxiety was associated with maternal anxious attachment beliefs, child insecure attachment beliefs, and children's perceptions of maternal control. Maternal anxious attachment beliefs mediated the association between maternal and child anxiety; however, child attachment beliefs and children's perceptions of maternal control did not. The influence of age and gender is also addressed. The findings are discussed in terms of elucidating the role of attachment beliefs and children's perceptions of maternal control on the association between maternal and child anxiety.     

Border Lines: Indigenous Peoples in Genocide Studies*

L'histoire des peuples autochtones ne figure pas parmi les sujets qui sont traités dans la recherche comparée en génocide. Les auteures examinent l'approche conceptuelle qui a conduit à cette lacune en s'attardant à la terminologie employée et à la distinction qu'impose la typologie du génocide entre génocide idéologique et génocide provoqué par l'expansion d'un groupe aux dépens d'un autre, et en soulignant l'importance qui est rattachée dans cette même typologie à la logique qui motive les régimes coupables de génocide. On examine également la relation qui existe entre génocide des peuples autochtones et ceux des autres peuples, ceci en relation avec trois critères d'analyse, soit la réaction des persécutés, le processus de guérison et la quête de justice. À la suite de cet examen, on démontre qu'une approche plus globale dans l'étude comparée du génocide, approche qui reconnaîtrait l'enver-gure des génocides des peuples autochtones, serait à l'avantage des chercheurs. Enfin, les auteures font remarquer que l'approche foncièrement européenne dans la recherche en génocide a pour effet de circonscrire le débat. The experiences of indigenous peoples have been left outside the framework of comparative genocide research. We first discuss conceptual reasons for this omission, focussing on the role of genocide definitions, ideological vs. developmental distinctions in genocide typologies, and the emphasis in genocide typologies on the motivations of perpetrators. We then illustrate the relation between indigenous genocides and other genocides by examining three important foci of genocide studies: responses, healing and justice. From these comparisons and contrasts, we conclude that a broader comparative approach that acknowledges the importance of indigenous genocides would contribute significantly to genocide studies. Finally, we note that adherence to European world views in genocide studies limits the potential for constructive analysis.     

Two-stage approaches to the analysis of occupancy data I: the homogeneous case (analysis of occupancy data)

Abstract

Occupancy models are used in statistical ecology to estimate species dispersion. The two components of an occupancy model are the detection and occupancy probabilities, with the main interest being in the occupancy probabilities. We show that for the homogeneous occupancy model there is an orthogonal transformation of the parameters that gives a natural two-stage inference procedure based on a conditional likelihood. We then extend this to a partial likelihood that gives explicit estimators of the model parameters. By allowing the separate modeling of the detection and occupancy probabilities, the extension of the two-stage approach to more general models has the potential to simplify the computational routines used there.     

Ratio tests under limiting normality

We propose a class of ratio tests that is applicable whenever a cumulation (of transformed) data is asymptotically normal upon appropriate normalization. The Karhunen–Loève theorem is employed to compute weighted averages. The test statistics are ratios of quadratic forms of these averages and hence scale-invariant, also called self-normalizing: The scaling parameter cancels asymptotically. Limiting distributions are obtained. Critical values and asymptotic local power functions can be calculated by standard numerical means. The ratio tests are directed against local alternatives and turn out to be almost as powerful as optimal competitors, without being plagued by nuisance parameters at the same time. Also in finite samples they perform well relative to self-normalizing competitors.     

Asymptotic normal tests for integration in panels with cross-dependent units

The asymptotically normal, regression-based LM integration test is adapted for panels with correlated units. The N different units may be integrated of different (fractional) orders under the null hypothesis. The paper first reviews conditions under which the test statistic is asymptotically (as T→∞) normal in a single unit. Then we adopt the framework of seemingly unrelated regression [SUR] for cross-correlated panels, and discuss a panel test statistic based on the feasible generalized least squares [GLS] estimator, which follows a χ ²(N) distribution. Third, a more powerful statistic is obtained by working under the assumption of equal deviations from the respective null in all units. Fourth, feasible GLS requires inversion of sample covariance matrices typically imposing T>N; in addition we discuss alternative covariance matrix estimators for T<N. The usefulness of our results is assessed in Monte Carlo experimentation.     

The influence of perceived shared risk in crisis communication: Elaborating the situational theory of publics

The study explored whether perceived shared experience with a media portrayal could influence various cognitions—such as concern, sense of personal involvement, and desire to learn more—that are important for behavior change. This research used the situational theory of publics in order to evaluate whether perceived shared risk is an antecedent to the factors leading to communication behavior. In general, the findings from this experiment supported the idea that shared risk experience with portrayals in news coverage has the potential to influence problem recognition, involvement recognition, and a new variable that combines information seeking and processing: that of information gaining.     

Measuring Knowledge,Attitudes and Behaviours Concerning Sustainable Development among Tenth Grade Students in Manitoba

In this paper we present standardized measures of tenth grade students’ knowledge, attitudes and behaviours concerning sustainable development as those concepts are understood in the United Nations Educational, Scientific and Cultural Organization, and we test the hypothesis that knowledge and favourable attitudes toward SD lead to favourable behaviours. Using a fairly representative random sample of 1,551 tenth grade students from the province of Manitoba, Canada, we crafted 3 indexes. There is a 20-item Index of Knowledge of SD with a good Cronbach alpha = 0.89, a 15-item Index of Attitudes Favourable Toward SD with alpha = 0.84 and a 15-item Index of Behaviours Favourable Toward SD with an alpha = 0.83. About 21% of the variation in our Behaviours Index scores could be accounted for by our Knowledge Index and Attitudes Index scores.     

Sports fans as crisis communicators on social media websites

Previous research has analyzed how organizations publicly respond in crisis situations. This study addresses a sports crisis, the University of Miami NCAA investigation, as an avenue for exploring how fans become surrogates for organizational crisis responses via the social media entity, Twitter. Using Coombs's (2007) strategy for reputation repair, analysis of 75 highly identified Miami fans with over 42,000 Twitter followers shows that fans were most likely to engage in (a) ingratiation, (b) reminder, (c) attack the accuser, and (d) divert attention as primary methods of coping with the scandal. New methods for reputation repair were also found within the analysis and implications for organizations, academic institutions, sports research, and crisis communication theory are articulated.