Search results for "IAA"
showing 10 items of 3445 documents
Donsker-Type Theorem for BSDEs: Rate of Convergence
2019
In this paper, we study in the Markovian case the rate of convergence in Wasserstein distance when the solution to a BSDE is approximated by a solution to a BSDE driven by a scaled random walk as introduced in Briand, Delyon and Mémin (Electron. Commun. Probab. 6 (2001) Art. ID 1). This is related to the approximation of solutions to semilinear second order parabolic PDEs by solutions to their associated finite difference schemes and the speed of convergence. peerReviewed
Extremal polynomials in stratified groups
2018
We introduce a family of extremal polynomials associated with the prolongation of a stratified nilpotent Lie algebra. These polynomials are related to a new algebraic characterization of abnormal subriemannian geodesics in stratified nilpotent Lie groups. They satisfy a set of remarkable structure relations that are used to integrate the adjoint equations.
Existence, uniqueness and Malliavin differentiability of Lévy-driven BSDEs with locally Lipschitz driver
2019
We investigate conditions for solvability and Malliavin differentiability of backward stochastic differential equations driven by a L\'evy process. In particular, we are interested in generators which satisfy a locally Lipschitz condition in the $Z$ and $U$ variable. This includes settings of linear, quadratic and exponential growths in those variables. Extending an idea of Cheridito and Nam to the jump setting and applying comparison theorems for L\'evy-driven BSDEs, we show existence, uniqueness, boundedness and Malliavin differentiability of a solution. The pivotal assumption to obtain these results is a boundedness condition on the terminal value $\xi$ and its Malliavin derivative $D\xi…
A systematic narrative review of prosociality in educational leadership
2018
Organizational scholars have vigorously and long studied being prosocial in defining ‘prosociality’ as motivation, behavior, and impact to help or benefit others. This study attempts to provide an overview of previous studies that have approached the elements of being prosocial in educational leadership contexts. However, most of the prosocial elements in education are not explicitly defined as prosociality and have not yet been systematically studied. Thus, this study explored the research questions: (a) What elements could be involved in prosociality within educational leadership? (b) Who could be involved in the process of prosociality in educational leadership? The final corpus of this …
Work-related stress of elementary school principals in Finland: Coping strategies and support
2021
The present study aimed to investigate elementary school principals’ self-reported causes of work-related stress, their coping strategies to deal with stress and the support they need for their leadership. Seventy-six principals filled in the questionnaire, which included open-ended questions. Qualitative content analysis was used to analyse the data. The results showed that the main sources of stress were workload, interpersonal conflicts, a lack of resources and internal pressures. Moreover, principals used emotion-focused, problem-focused and social coping to deal with stress. Additionally, principals reported a need for problem-focused support and social support for their leadership. T…
Work-Related Social Media Use : The Mediating Role of Social Media Communication Self-Efficacy
2022
Social media use has become an indispensable part of knowledge work. Employees posting work-related content on social media are considered credible sources of information and have significant importance for how stakeholders, such as potential customers and future employees, perceive the organization. Therefore, employees’ ability to communicate about their work on social media has become a competitive advantage both for individual employees and for their organizations, especially in the professional service sector. Hence, understanding the role of employees’ ability to use these social media professionally is crucial for understanding the communicative behaviors of contemporary knowledge wo…
‘You really are a great big sister’ – parasocial relationships, credibility, and the moderating role of audience comments in influencer marketing
2020
This study examines the moderating role of audience comments in influencer marketing. A YouTube vlog entry by a social media influencer featuring the endorsement of a brand was studied, and an experimental design featuring two conditions related to audience comments was created. The results indicate that a parasocial relationship with the influencer builds the perceived credibility of the influencer, while comments by other audience members moderate the effect. Influencer credibility positively affects brand trust and purchase intention. The findings enhance the understanding of the role of an active audience in influencer marketing. peerReviewed
Social Cognition and Socioecological Predictors of Home-Based Physical Activity Intentions, Planning, and Habits during the COVID-19 Pandemic
2020
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The Structure of Group Identification
2017
The concept of group identification has been widely discussed in the fields of social psychology and social ontology. The debate has been somewhat unbalanced, however. The structure, nature, and experiential status of groups have been assessed widely and from several perspectives. Instead, the concept of identification as received considerably less attention. This is why the ongoing debate threatens to be misled by various conceptual ambiguities. These ambiguities concern first and foremost the target, structure, and temporal nature of identification. The present article offers a philosophical analysis of the concept and clarifies the conceptual ambiguities haunting the debate. peerReviewed
Pääministeri Alexander Stubb Twitterissä : henkilökuva ja itsensä esittämisen strategiat
2016
Tämän tieteellisen tutkielman tarkoituksena oli kuvata ja ymmärtää pääministeri Alexander Stubbin henkilökuvan hallintaa Twitterissä. Tavoitteena oli vastata siihen, millainen henkilökuva Alexander Stubbista hänen twiittiensä perusteella muodostuu, ja mitä itsensä esittämisen strategioita Alexander Stubbin twiiteistä voidaan tunnistaa. Tutkimusaineisto koostui Alexander Stubbin käyttäjätililtä loka- ja joulukuussa 2014 julkaistuista twiiteistä, joita oli 312 kappaletta. Tutkimusaineiston analysoinnissa on käytetty laadullista, aineistolähtöistä sisällönanalyysiä sekä teoriasidonnaista analyysiä. Teoriasidonnaisen analyysin käytöllä pyrittiin ohjaamaan vastausten etsimistä tutkimustehtävää a…