Bien qu'il soit generalement admis depuis l'article de Arrow (1962) que l'activite privee de Recherche et Developpement (R&D) peut constituer une source importantes d'effets externes, peu de chercheurs ont tente d'appercier dans quelle mesure ces externalites pouvaient influer sur la performance...

A method is proposed to provide robust poverty comparisons and robust evaluations of marginal policy reforms under income variability. Given that a household’s certainty equivalent income depends on both expected income and income variability, stochastic dominance tests are developed in order...

Based on empirical facts, we build a model of informal insurance institutions and study their stability. In our setting, risk sharing groups are overlapping homogenous coalitions, originating from networks of historical trust relationships. We derive a general folk theorem that works in an...

We show in this paper that the growth rate of the Sen index is multi-decomposable, that is, decomposable simultaneously by groups and income sources. The multi-decomposition of the poverty growth yields respectively: the growth rate of the poverty incidence (poverty rate) decomposed by groups,...