Private benefits extraction in closely-held corporations: the case for multiple large shareholders

This paper investigates how multiple large shareholders share control and extract private benefits in closely-held corporations. We find that ownership structures with multiple large shareholders are common and very stable. Moreover, they seem to be, to a large extent, exogenously given. The structure of the controlling group of shareholders has a very significant impact on performance. Performance improves as the control group's ownership stake increases and, for a given ownership stake, as the number of members increases. The economic significance of the effects indicates that minority expropriation is a very important problem in closely-held firms

Gradings of null-filiform and naturally graded filiform Leibniz algebras

In the paper we describe all gradings admitting on null-filiform and naturally graded filiform Leibniz algebras.Comment: 9 page

Animación a la lectura en bibliotecas universitarias con el apoyo de las TIC

Reading, technology, ITC, university, library and reading promotion are the title words. They are mixed for building a picture about their conections, their continuities or their disruptive characters by examples, readings, activities

Leibniz algebras of Heisenberg type

We introduce and provide a classification theorem for the class of Heisenberg-Fock Leibniz algebras. This category of algebras is formed by those Leibniz algebras L whose corresponding Lie algebras are Heisenberg algebras Hn and whose Hn-modules I, where I denotes the ideal generated by the squares of elements of L, are isomorphic to Fock modules. We also consider the three-dimensional Heisenberg algebra H3 and study three classes of Leibniz algebras with H3 as corresponding Lie algebra, by taking certain generalizations of the Fock module. Moreover, we describe the class of Leibniz algebras with Hn as corresponding Lie algebra and such that the action I × Hn ! I gives rise to a minimal faithful representation of Hn. The classification of this family of Leibniz algebras for the case of n = 3 is given

Nombres geográficos sevillanos en el Nuevo Mundo

Disertación leida en la Sesión del día 21/VI/1987

Rasgos biográficos e ideológicos de José de San Martín

Disertación leída en la Sesión del 22-11-1991