Paris West University Nanterre La Défense

About: Paris West University Nanterre La Défense is a education organization based out in Paris, France. It is known for research contribution in the topics: Population & Finite element method. The organization has 895 authors who have published 1430 publications receiving 21712 citations.

Accounting Transparency and the Cost of Capital

Abstract: This paper identifies a negative effect of corporate transparency, and shows that more precise accounting standards can lead to a higher cost of capital. We build a model of a firm raising funds through an IPO to finance a positive NPV project. Due the presence of an informed speculator, increased disclosure through accounting data can increase informational asymmetries in the secondary market, thereby reducing market liquidity. Our uninformed traders are rational liquidity traders that anticipate that they loose because of informed trading. Reduction in market liquidity therefore leads to higher cost of external capital. The ”agency cost” comes from asymmetries among investors. JEL classification: D82, G10, M41

Poisson-type deviation inequalities for curved continuous-time Markov chains

Abstract: In this paper, we present new Poisson-type deviation inequalities for continuous-time Markov chains whose Wasserstein curvature or $\Gamma$-curvature is bounded below. Although these two curvatures are equivalent for Brownian motion on Riemannian manifolds, they are not comparable in discrete settings and yield different deviation bounds. In the case of birth--death processes, we provide some conditions on the transition rates of the associated generator for such curvatures to be bounded below and we extend the deviation inequalities established [An\'{e}, C. and Ledoux, M. On logarithmic Sobolev inequalities for continuous time random walks on graphs. Probab. Theory Related Fields 116 (2000) 573--602] for continuous-time random walks, seen as models in null curvature. Some applications of these tail estimates are given for Brownian-driven Ornstein--Uhlenbeck processes and $M/M/1$ queues.

Reprogrammable Digital Holograms and Multibit Spatial Energy Modulation Using a Reflective Metasurface

Abstract: Holography has been extensively studied as a vital method to tailor wavefronts of electromagnetic waves. Compared to conventional holography, metasurface-based holography generally presents the adv...

Une mesure financière de l’importance de la prime de risque de change dans la prime de risque boursière

Abstract: This study tests an international extension of the Asset Pricing Model (CAPM) based on the coexistence of two risk causes The first cause is linked to the market portfolio and the second one is required by expectations about the variation of exchange rates Through an application to various developed and emerging countries, we show that the exchange risk premium in the ICAPM is statistically and economically significant and contribues to the formation of the total risk premium by using the conditional approach of exchange rate variations