In this article, tests for globalization and contagion are separated using an ex ante definition of crises, and contagion tests are neutralized with respect to globalization effects. A large database is constructed to study the stability of correlation matrices for four asset classes: equities,...

Bitcoin is a major virtual currency. Using weekly data over the 2010-2013 period, we analyze a Bitcoin investment from the standpoint of a U.S. investor with a diversified portfolio including both traditional assets (worldwide stocks, bonds, hard currencies) and alternative investments...

This paper is the first to draw a global picture of worldwide microfinance equity by taking full advantage of daily quoted prices. We revisit previous findings showing that investors should consider microfinance as a self-standing sector. Our results are threefold. First, microfinance has become...

This paper defines a “crisis-robust portfolio” that satisfies the minimal crisis-to-quiet time volatility ratio. This type of portfolio is less demanding for the investor than a regime-wise asset allocation. Although general, the concept of a crisis-robust portfolio is especially pertinent...

The market portfolio efficiency remains controversial. This paper develops a new test of portfolio mean-variance efficiency relying on the realistic assumption that all assets are risky. The test is based on the vertical distance of a portfolio from the efficient frontier. Monte Carlo...

This paper draws a global picture of worldwide microfinance equity. Taking full advantage of daily quoted prices of microfinance stocks from their issuance, we construct microfinance country equity indices and an international global microfinance index. We analyze changes in these indices,...

Control tunnelling over firms can be reached through pyramids, cross-ownership, and other complex features. This phenomenon is frequent in Europe and in Asia. However, the theoretical literature has not yet converged toward a well-defined and robust measurement of integrated control that takes...

Cet article étudie le choix de portefeuille en fonction de l'âge de l’investisseur. Il propose ainsi un abord empirique du débat animé relatif à la pertinence de la diversification temporelle. Grâce à une base de données originale contenant plus de 6000 portefeuilles placés en gestion...

Pyramids, cross-ownership, rings and other complex features inducing control tunnelling are frequent in the European and Asian industrial world. Based on the matrix methodology, this paper offers a model for measuring integrated ownership and threshold-based control, applicable to any group of...

La littérature académique en gouvernance d’entreprise étudie en particulier la séparation entre propriété et contrôle au sein de l’actionnariat des entreprises privées. Après avoir présenté les résultats relatifs au bénéfice privé de contrôle et leur impact potentiel sur les...