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: Computer science & Politics. The organization has 895 authors who have published 1430 publications receiving 21712 citations.

Do the highest-paid CEOs affect the accounting conservatism? An empirical investigation in France

Abstract: How to cite this paper: Aguir, A., Alqatan, A., & Bzeouich, B. (2021). Do the highest-paid CEOs affect the accounting conservatism? An empirical investigation in France. Journal of Governance & Regulation, 10(2), 96–107. https://doi.org/10.22495/jgrv10i2art9 Copyright © 2021 The Authors This work is licensed under a Creative Commons Attribution 4.0 International License (CC BY 4.0). https://creativecommons.org/licenses/by/

Did foreign exchange holding influence growth performance during the global financial crisis

Abstract: In a context of increased foreign exchange reserves holding from emerging and developing countries, this paper investigates the diminishing return of reserves holding assumption over the most severe phase of the global financial crisis (2008Q1-2010Q4). Relying on a Panel Smooth Transition Regression model, we highlight the differential effect of the accumulation of foreign exchange reserves for a set of financial vulnerabilities variables. Specifically, while reserve accumulation is effective above a critical threshold to cope with vulnerabilities related to the financial channel, we show that it becomes less effective beyond a certain threshold for domestic bank vulnerabilities.

Spectral Shrinkage of Tyler's $M$ -Estimator of Covariance Matrix

Abstract: Covariance matrices usually exhibit specific spectral structures, such as low-rank ones in the case of factor models. In order to exploit this prior knowledge in a robust estimation process, we propose a new regularized version of Tyler's $M$ -estimator of covariance matrix. This estimator is expressed as the minimizer of a robust $M$ -estimating cost function plus a penalty that is unitary invariant (i.e., that only applies on the eigenvalue) that shrinks the estimated spectrum toward a fixed target. The structure of the estimate is expressed through an interpretable fixed-point equation. A majorization-minimization (MM) algorithm is derived to compute this estimator, and the $g$ -convexity of the objective is also discussed. Several simulation studies illustrate the interest of the approach and also explore a method to automatically choose the target spectrum through an auxiliary estimator.

Sur le caractère inadéquat du « résidu de Solow » et la sous-estimation des progrès de productivité

Abstract: Le « residu de Solow » [1957] est une mesure largement utilisee des progres de productivite. Cette contribution propose une vision critique de la methode standard, met en evidence cinq raisons a la sous-evaluation des gains de productivite par les estimations traditionnelles et fait quelques propositions d’amelioration des procedures habituelles.

A Limit Theorem for Mean Magnetisation in the Sherrington-Kirkpatrick Model with an External Field

Abstract: Some properties of mean magnetization (i.e., mean spin) are established in the case of a SK model with an external field, and a central limit theorem is proved.