Calendrier du 21 novembre 2017
Paris Migration Seminar
Du 21/11/2017 de 17:00 à 18:15
R1-13
FASANI Francesco (Queen Mary – University of London)
Border Policies and Unauthorized Flows: Evidence from the Refugee Crisis in Europe
écrit avec joint with Tommaso Frattini
Paris Trade Seminar
Du 21/11/2017 de 14:45 à 16:15
ScPo, 28 rue des Saints Pères, 75007 Paris, salle H405
MANOVA Kalina (Oxford)
*The Origins of Firm Heterogeneity: A Production Network Approach
écrit avec A. Bernard (Dartmouth Tuck), E. Dhyne (NBB), A. Moxnes (Oslo), and G. Magerman (ECARES).
This paper quantifies the origins of firm size heterogeneity when firms are interconnected in a production network. We document new stylized facts about the universe of buyer-supplier relationships among all firms in Belgium during 2002-2014. These facts motivate a model in which firms buy inputs from upstream suppliers and sell to downstream buyers and final demand. Firms can be large not only because they have high production capability (i.e. productivity or product quality), but also because they interact with more, better and larger buyers and suppliers, and because they are better matched to their buyers and suppliers. The model delivers an exact decomposition of firm size into supply an demand margins with firm, buyer/supplier and match components. We establish three empirical results. First, demand factors explain 81% of firm size heterogeneity, while supply factors only 19%. Second, nearly all the variation on the demand side (99%) is driven by sales to other firms rather than final demand. By contrast, 88% of the variation on the supply side reflects heterogeneity in own production capability and 12% comes from input suppliers. Third, the extensive margin of the production network dominates the intensive margin. Most of the variance in the network demand and network supply components of firm size is determined by the number of customers and suppliers, rather than their size or capability. Second most important is that firms transact more with
partners that are simultaneously more capable and better bilateral matches.
Applied Economics Lunch Seminar
Du 21/11/2017 de 12:30 à 13:30
Salle R1-09, Campus Jourdan, 48 boulevard Jourdan, 75014 Paris
ASSOUAD Lydia (PSE)
Measuring lnequality in the Middle East 1990-2016: The World’s Most Unequal Region?
écrit avec F. Alvaredo and T. Piketty
In this paper we combine household surveys, national accounts, income tax data and wealth data in order to estimate the level and evolution of income concentration in the Middle East for the period 1990-2016. According to our benchmark series, the Middle East appears to be the most unequal region in the world, with a top decile income share as large as 61%, as compared to 36% in Western Europe, 47% in the USA and 55% in Brazil. This is due both to enormous inequality between countries (particularly between oil-rich and population-rich countries) and to large inequality within countries (which we probably under-estimate, given the limited access to proper fiscal data). We stress the importance of increasing transparency on income and wealth in the Middle East, as well as the need to develop mechanisms of regional redistribution and investment
Du 21/11/2017 de 12:00 à 14:00
Salle R1-13, Campus Jourdan, 48 boulevard Jourdan, 75014 Paris
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La séance est annulée
PSI-PSE (Petit Séminaire Informel de la Paris School of Economics) Seminar
Du 21/11/2017
JAROTSCHKIN Alexandra (PSE)
Diffusion of (Non-)Discriminatory Culture: Evidence from Stalin's Ethnic Deportations
écrit avec Ekaterina Zhuravskaya and Alain Blum