Salle 3001

Olivier BLANCHARD (…) “t.b.a.”

Abstract: 

Organizer : Gauthier Vermandel

Raman UPPAL (EDHEC Business School) “Evaluating the Impact of Portfolio Mandates”

Abstract : T.B.A.

Organizers:  Patricia Crifo, Emmanuel Gobet, Peter Tankov, Gauthier Vermandel, and Olivier David Zerbib

Sponsors:
CREST-CMAP

Ewa BATYRA (Center for Demographics Studies CED Barcelona) – “Disparities in the timing of family formation within countries of the Global South: Patterns and determinants”

Abstract :  “Large disparities in the age at which women start having children and enter their first union are striking features of family formation patterns in many countries of the Global South. Despite being vital aspects of social stratification, the determinants of these pronounced disparities remain poorly understood. I will give an overview of existing studies documenting variation in the age of childbearing and union formation within African, Latin American and Asian countries. Then, I will present research that used Demographic and Health Surveys from over 50 countries and different measures and models of variability to examine the potential role of income and educational inequality in shaping these disparities. I will show that variation in the timing of family formation is larger within countries with higher levels of income inequality. Moreover, in many nations, the strength with which education affects the timing of family formation differs within populations, and this heterogeneity is more pronounced in countries with lower-quality schooling. I will discuss the importance of conducting cross-country comparative analyses and examining the role of macro-level factors related to socioeconomic inequality to enhance our understanding of family formation globally.”

Organizers:
Paola TUBARO (Pôle sociologie CREST)

Sofian EL ATIFI (Pôle sociologie CREST)

Patrick PRÄG (Pôle sociologie CREST)

Sponsors:
CREST

November 15, 2024, 11am-12.15pm: Elie Vidal Naquet (HEC)

Miren AZKARATE-ASKASUA (University of Mannheim) – “Union and Firm Labor Market Power”

Abstract :  ”

Can union and firm market power counteract each other ? What are the output and welfare effects of employer and union labor market power? Using data from French manufacturing firms, we leverage mass layoff shocks to competitors to identify a negative effect of employment concentration on wages. In line with the reduced form evidence and the French institutional setting, we develop and estimate a multi-sector bargaining model that incorporates employer market power. We find that, in the absence of unions, output decreases by 0.48 percent because they partially counteract distortions coming from oligopsony power. The reallocation of employment across space is key to realize the output gains from unions.”

Organizers:  Benoît SCHMUTZ (Pôle économie du CREST)
Clément MALGOUYRES (Pôle économie du CREST)

Sponsors:
CREST

Lieu  : Assemblée Nationale

Avec la participation de Pierre Boyer

http://www.fondafip.org/evenements/colloque-finances-publiques-et-defense-nationale-le-21-novembre-2024-a-lassemblee-nationale

Salle des Chaires de l’Institut Louis Bachelier

Alexandre BROUSTE (Université du Mans)  “Quelques contributions récentes à la méthode one-step ”

Abstract:

En statistique paramétrique, la procédure one-step consiste à corriger un estimateur initial par une seule étape de descente de gradient (Fisher scoring) sur la fonction de log-vraisemblance. Elle permet ainsi de construire, dans certains cas, des estimateurs rapides et asymptotiquement efficaces.

Si cette procédure est bien connue des statisticiens, elle n’a finalement été que peu utilisée en pratique. Cela s’explique par les hypothèses imposées, dans sa version classique, à l’estimateur initial. Cependant, des résultats récents permettent de relaxer ces hypothèses, ouvrant ainsi un large champ d’applications.

Nous présenterons nos contributions récentes concernant les expériences statistiques impliquant des échantillons i.i.d., des modèles linéaires généralisés et, si le temps le permet, des séries chronologiques ainsi que des processus fractionnaires.

Organisateurs : Hillairet Caroline, Olivier Lopez

Lieu :

Salle des Chaires de l’Institut Louis Bachelier

4e étage, Palais Brongniart

16 place de la Bourse

Paris 2eme.

Salle 3001

Kerstin HOLZHEU (Sciences Po) “t.b.a.”

Abstract: 

Organizer : Suzanne BELLUE