Search results for "relation"
showing 10 items of 10542 documents
Spectral density of the correlation matrix of factor models: a random matrix theory approach.
2005
We studied the eigenvalue spectral density of the correlation matrix of factor models of multivariate time series. By making use of the random matrix theory, we analytically quantified the effect of statistical uncertainty on the spectral density due to the finiteness of the sample. We considered a broad range of models, ranging from one-factor models to hierarchical multifactor models.
On periodic radical groups in which permutability is a transitive relation
2007
Abstract A group G is said to be a PT - group if permutability is a transitive relation in the set of all subgroups of G . Our purpose in this paper is to study PT -groups in the class of periodic radical groups satisfying min- p for all primes p .
Co-jumps and Markov Counting Systems in Random Environments
2020
Motivated by the analysis of multi-strain infectious disease data, we provide closed-form transition rates for continuous-time Markov chains that arise from subjecting Markov counting systems to correlated environmental noises. Noise correlation induces co-jumps or counts that occur simultaneously in several counting processes. Such co-jumps are necessary and sufficient for infinitesimal correlation between counting processes of the system. We analyzed such infinitesimal correlation for a specific infectious disease model by randomizing time of Kolmogorov’s Backward system of differential equations based on appropriate stochastic integrals.
Imprimitive groups highly transitive on blocks
2004
We classify imprimitive groups acting highly transitively on blocks and satisfying conditions common in geometry. They can be realized as suitable subgroups of twisted wreath products.
A Note on Symmetry in Job Contact Networks
2007
Since the seminal work of Granovetter (1995), the sociological literature highlighted the importance of social relationships, like friends, relatives and acquaintances, as sources of information on jobs in labor markets. Such importance is also confirmed by a number of empirical studies.3 More recently, economists have devoted considerable attention to this topic,4 so that the study of individual and aggregate economic outcomes produced by the presence of social relationships in labor markets is becoming a fruitful research area in economics.
Business Communication and Social Media: Tendencies, Problems and Future in Latvia
2013
Such internet social media as blogs and micro-blogs, social networks, content communities, forums and wikis in Latvia are gaining more popularity among users. It also motivates companies to communicate in this environment. Brands are creating their profiles in social networks, blogging and communicating in forums and publishing video. However, crucial issue here is whether all Latvian companies use social media in their communication pursuant to the specifics of this environment.
Some Quantitative Aspects of Stability Management Strategy in a Bank
2012
Abstract The stability of commercial bank system is the result of balanced development, which can be characterised by equilibrium and security over a longer period of time. The history of commercial bank system development indicates that reaching and sustaining this qualitative and quantitative state requires regulations and management. One of the most important parts of commercial bank management system is correctly chosen strategy in the circumstances of a changing environment. Strategy gives a possibility to look into the future of the commercial bank, forecast its goals, areas, scale and potential operational results in relation to resource sources and expenses. Nowadays a commercial ba…
Assessing the Enlargement and Deepening of the European Union
2008
This paper estimates a theoreticallymotivated gravity model to examine the effect of the European Union (EU) on trade and whet her the order of entry has affected the trade performance of member countries. Additionally, we analyse the impact of the diffe rent phases of EU integration on trade. The results show that both original countries and successive enlargements boost intra-b loc trade. Moreover, the results suggest that the deepening in the integration process has led to more trade creation among members. Finally, only the latter ph ase of the European integration process (the single currency) has increased trade with non-members.
The Marketisation of Higher Education: Antecedents, Processes, and Outcomes
2021
This chapter explores the ideological antecedents, processes, and outcomes of the marketisation of higher education, with an emphasis on business schools in particular. The chapter begins with a discussion of the theory of Scandinavian New Institutionalism in the context of higher education, explaining how ideologies spread across nations and fields through adoption and adaptation. It then elaborates the ideologies of neoliberalism and managerialism, and their relation to New Public Management. The chapter continues by elucidating the processes which are related to marketisation—namely commodification, corporatisation, and de-professionalisation. It then enumerates the various outcomes of t…
Una mirada a los requisitos de la obtención de la nacionalidad española por residencia
2014
Vivimos en un mundo globalizado y la movilidad de las personas es identificativo de la modernidad, por esta razón la obtención de la nacionalidad española por residencia constituye un tema de importancia en el entorno social, económico, político y jurídico español. Para un extranjero adquirir la nacionalidad es un largo camino transitado más de espinas que de rosas, por ello este tema requiere ser visto con toda la seriedad que sea posible. El objetivo de este trabajo es reseñar algunas de las doctrinas de la jurisprudencia más actualizada en la materia, en relación a los requisitos exigidos para la obtención de la nacionalidad española. Partiendo de la premisa, que cuando un extranjero lle…