CEO overconfidence and the influence on firm innovation: s study about well-established multinationals during 2008-2016

Previous research has mainly investigated the effect of CEO overconfidence on financial outcomes. However, only little research has been conducted about the influence of CEO overconfidence on firm innovation. Moreover, no studies have examined when CEO background characteristics such as tenure and power distance, influence the latter relationship. Consequently, the purpose of this master’s thesis is to analyze the impact of CEO overconfidence on firm innovation, and to explore whether tenure and power distance influence this relationship. Using shareholder letters to measure overconfidence, the results indicate that over the 2008-2016 period, CEO overconfidence positively influences firm innovation for well established-multinationals active in non-innovative industries. Nonetheless, for well-established multinationals in innovative industries, there exists no relationship between CEO overconfidence and innovation. Furthermore, in line with the theoretical research, the findings demonstrate a negative moderating impact of tenure in both innovative and non-innovative industries. Unlike CEO tenure, the influence of CEO power distance could not be investigated due to correlational issues with both CEO overconfidence and CEO tenure. By highlighting the importance of CEO overconfidence in explaining a valuable organizational outcome such as firm innovation and by unveiling the moderating impact of CEO tenure, the thesis contributes to the existing upper-echelons and tone-at-the-top literature

Relationship between martensitic plate size and austenitic grain size in martensitic transformations

A systematic experimental analysis based on an assessment of the mean martensite plate size (hplate) in sub-grain domains was implemented to characterize the martensite morphology in polycrystalline Cu-based shape memory alloys. In the grain size range below 100μm, a linear relationship between the average width of the martensite plates and the mean grain size was obtained for a thermal-induced martensitic transformation. This evaluation allows us to perform an analysis of how microstructural length scales affect the martensitic transformation.Fil: la Roca, Paulo Matías. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaFil: Isola, Lucio Manuel. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; ArgentinaFil: Vermaut, Ph.. Institut de Recherche de Chimie Paris; Francia. Centre National de la Recherche Scientifique; Francia. Université Pierre et Marie Curie; FranciaFil: Malarria, Jorge Alberto. Consejo Nacional de Investigaciones Científicas y Técnicas. Centro Científico Tecnológico Conicet - Rosario. Instituto de Física de Rosario. Universidad Nacional de Rosario. Instituto de Física de Rosario; Argentin

High In-content InGaN layers synthesized by plasma-assisted molecular-beam epitaxy: growth conditions, strain relaxation and In incorporation kinetics

We report the interplay between In incorporation and strain relaxation kinetics in high-In-content InxGa1-xN (x = 0.3) layers grown by plasma-assisted molecular-beam epitaxy. For In mole fractions x = 0.13-0.48, best structural and morphological quality is obtained under In excess conditions, at In accumulation limit, and at a growth temperature where InGaN decomposition is active. Under such conditions, in situ and ex situ analysis of the evolution of the crystalline structure with the growth thickness points to an onset of misfit relaxation after the growth of 40 nm, and a gradual relaxation during more than 200 nm which results in an inhomogeneous strain distribution along the growth axis. This process is associated with a compositional pulling effect, i.e. indium incorporation is partially inhibited in presence of compressive strain, resulting in a compositional gradient with increasing In mole fraction towards the surface

Approche physique du procédé d’enduction grande vitesse (EGV) d’un filament de carbure de silicium SiC par un alliage de titane liquide

Le procédé EGV consiste à faire passer un filament de SiC au travers d’un bain de titane liquide. Ce procédé bien qu’économiquement rentable induit des artéfacts : déstabilisation de la gaine liquide (formations de gouttes), mauvais mouillage du filament ; effets qu’il convient de maîtriser ou limiter. Cette pluridisciplinarité nous a portés à analyser le problème par voie numérique ainsi qu’expérimentale (dispositif modèle) pour approcher le système industriel par l’étude de cas modèles