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24, chemin de Borde Rouge –Auzeville – CS52627
31326 Castanet Tolosan CEDEX - France

Dernière mise à jour : Mai 2018

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Economie Publique

UMR Economie Publique



Next seminars :

November, 5th 2019

Economic incentives of deforestation
Valentin Guye (Economie Publique)

November, 12th 2019

Julien Wolfersberger (Economie Publique)


Trust and Specialization: Evidence from U.S. States
Arthur Silve (Université de Laval, Québec), co-écrit avec José De Sousa, Amélie Guillin, et Julie Lochard

November, 26th 2019

Sylvain Chabet-Ferret (INRA - TSE)

December, 17th 2019

Julie Subervie (INRA CEE-M)

Past seminars:

October, 17th 2019

Farm Size and the Economic Impacts of Climate Change
Olivier Deschenes (University of California, Santa Barbara)

October, 1st 2019

Rémi Généroso (Université de Lille - LEM CNRS)

July, 9th 2019

Do pollution markets harm low income and minority communities? Ranking emissions distributions generated by California’s RECLAIM program
Glenn Sheriff (Arizona State University), co-author Erin T. Mansur

May, 7th 2019

Not so costly: how cost flexibility influences firm behavior
Philippe Bontems (Inra TSE-R)
Abstract: Assumptions on preferences and technologies matter in an important way for deriving comparative results in trade, industrial organization and other fields. For instance, standard models of trade virtually all assume constant marginal cost of production and shipping for the sake of tractability. However, these assumptions seem at odds with the reality of logistics activities and cannot easily be invoked to explain a number of puzzles in trade like the observed rapid falloff of trade flows with distance. The assumption of economies of scale in production driven by the presence of fixed cost associated to constant marginal cost is equally restrictive. Indeed, there are many reasons to believe that increasing marginal cost are also important to explain firms behavior.
There are two ways to escape from the constant marginal cost assumption: (i) find tractable but flexible forms for demand and cost to generate closed form solutions (see Fabinger & Weyl, 2018) or (ii) show that actually many comparative results depend only on a limited number of demand and cost characteristics (see Mrazova & Neary (2017) for an approach that focuses on demand only).
This paper takes the second route and introduce a new way to capture the crucial features of cost and demand to characterize firm's optimization conditions. From this I derive novel pass-through formulas, that I compare to the ones proposed in the literature (Weyl and Fabinger, 2013). I then apply these concepts to study (i) conditions under which taxation lies on the wrong side of the Laffer curve, and (ii) how globalization impacts firms profits and welfare in a Krugman and in a Melitz like trade models for arbitrary cost and demand structures. I also provide an extension to markets with oligopolies

April, 9th 2019

Agricultural Risk and Remittances: The Case of Uganda
Stefanija Veljanoska (UcLouvain- IRES)

April, 2sd 2019

Analyse économique des éco-parcs industriels: une approche par les transactions pour la valorisation des synergies et la gestion des risques
Robin Molinier

March,26th 2019

Innovation in climate change mitigation technologies and environmental regulation
Julie Lochard de Paris-Est Créteil (Erudite), co-authors Igor Bagayev et Dieter Kogler

February, 26th 2019

Simulating the market and environmental impacts of French pesticide policies: a macroeconomic assessment
François Bareille, (INRA - Smart), co-author Alexandre Gohin

February, 19th 2019

Mobilité pendulaire et formes urbaines: cas des aires urbaines françaises métropolitaines
Romain Gaté (INRA - Smart), co-écrit avec Carl Gaigné et Mohamed Hilal

February, 5th 2019

How big is the “lemons” problem? Historical evidence from French appellation wines
Emmanuel Paroissien, co-authors Pierre Mérel et Ariel Ortiz-Bobea

December 13th, 2018

A Less Simplistic Approach to Landscape Complexity
Anouch Missirian


La tendance à la consolidation des terres et à l’homogénisation du paysage agricole peut être individuellement rationnelle, par exemple du fait de l’existence d’économies d’échelle, ou pour ne produire que la culture la mieux adaptée aux conditions locales. A l’échelle d’un paysage, en revanche, l’on pourrait prévoir que la généralisation de ce comportement, i.e. une simplification radicale du paysage agricole, pourrait conduire, en théorie, conduire à la présence accrue d’insectes ravageurs, en favorisant leur développement et en nuisant à leurs prédateurs. Cette pression accrue engendrerait des coûts privés pour les agriculteurs (pertes de rendements, pesticides). Cette étude vise à évaluer et quantifier cette relation putative entre complexité du paysage agricole et pression des ravageurs dans le cas des Etats-Unis.