Thesis (Ph. D.)--University of Chicago, Dept. of Mathematics, June 2000. / Includes bibliographical references. Also available on the Internet.

Thesis (doctoral)--Rheinische Friedrich-Wilhelms-Universität Bonn, 1997. / Includes bibliographical references (p. 70-71).

Entrepreneurship has traditionally attracted governments’ attention because of its potential correlation with economic growth. Despite the large amount of research done regarding entrepreneurship, little is known about the relationship between a country’s institutions and its level of entrepreneurship. The purpose of this study is to find out if there are institutional explanations to why some countries seem to promote entrepreneurship better than others. This report examines to what extent institutions derived from Varieties of Capitalism affect the degree of entrepreneurship in a country. The institutions are education, labour regulation, and financing structure. This will be done through a set of regression analysis based on data from a large number of countries. The results of the analysis show that there is a positive correlation between vocational education and the level of entrepreneurship. In contrast to the theory Varieties of Capitalism this study could not find support that labour regulation and financing structure had a direct effect on entrepreneurship. The results indicate that the relationship between institutions and entrepreneurship is complex and that there is need for further examination.

Deux familles d'algèbres noethériennes connexes constituent les objets d'étude de cette thèse ; on les regarde, suivant les idées générales de la géométrie non commutative, comme des anneaux de coordonnées homogènes de certaines variétés projectives. La première famille est celle des variétés toriques quantiques, autrement dit les sous algèbres graduées de tores quantiques. Nous classifions ces algèbres et nous étudions ses propriétés de régularité homologique suivant notamment Artin-Schelter, Zhang et Van den Bergh. La deuxième famille est celle des variétés de drapeaux quantiques et leurs sous variétés de Schubert. Nous démontrons que les algèbres appartenant à cette deuxième famille possèdent une filtration tel que leur graduée associé est une variété torique quantique. Ensuite nous démontrons que les propriétés de régularité homologique des variétés de drapeaux quantiques et des variétés de Schubert se déduisent de celles des variétés toriques quantiques. / The objects of study of this thesis are two families of ”noncommutative varieties”, that is noetherian connected N-graded algebras which, following the general notions of noncommutative geometry, we regard as analogues of homogeneous coordinate rings of certain projective varieties. The first family is that of quantum toric varieties, which are graded subalgebras of quantum tori. We classify these algebras and study their homological regularity properties as defined by Artin-Schelter, Zhang, Van den Bergh, etc. The second family is that of quantum flag varieties and associated algebras, noncommutative analogues of the homogeneous coordinate rings of flag varieties and their Schubert subvarieties. We show that the members of this second family can be endowed with a filtration such that their associated graded algebras are quantum toric varieties. We then show that the homological regularity properties of quantum flag and Schubert varieties can be deduced from those of quantum toric varieties. / Los objetos de estudio de esta tesis pertenecen a dos familias de ”variedades no conmutativas”, es decir álgebras N-graduadas conexas noetherianas a las que consideramos, siguiendo la perspectiva de la geometría no conmutativa, como análogos de anillos de coordenadas homogéneas sobre ciertas variedades proyectivas. La primera familia es la de las variedades toricas cuánticas, subálgebras graduadas de toros cuánticos. Clasificamos estas álgebras y estimados en detalle sus propiedades de regularidad homológica, definidas por Artin-Schelter, Zhang, Van den Bergh, etc. La segunda familia es la de las álgebras conocidas como variedades de banderas cuánticas y otras álgebras asociadas, análogos no conmutativos de las álgebras de coordenadas homogeneas de las variedades de banderas y de sus subvariedades de Schubert. Demostramos que los miembros de esta segunda familia pueden filtrarse de forma que sus álgebras graduadas asociadas son variedades toricas cuánticas. Luego probamos que las propiedades de las regularidad homológica de las álgebras de las variedades de bandera y de Schubert cuánticas se deducen de la propriedades de las variedades toricas cuánticas.

No description available.

Ill. mounted. Bibliography: leaves 125-131.

Thesis (Ph. D.)--University of Chicago, Department of Mathematics, August 2003. / Includes bibliographical references. Also available on the Internet.

LD2668 .T4 1947 P7 / Master of Science

LD2668 .T4 1962 P37

Call number: LD2668 .T4 1965 K46 / Master of Science