Séminaires à la Faculté des Sciences Économiques de Rennes

Retrouvez tous nos séminaires de l'année et ceux des années antérieures

Séminaires du CREM à la Faculté des Sciences Economiques

Saison 2020 - 2021

Retrouvez ci dessous la liste des séminaires en préparation pour la saison 2020-2021. Sauf indication contraire, les séminaires ont lieu dans l'amphithéâtre Krier (bâtiment 1, au rez-de-chaussée) de 12h15 à 13h30.

  • Jeudi 22 avril 2021 - Marc Deschamps (Université de Bourgogne-Franche Comté)
  • Jeudi 8 avril 2021 - Tran Thu-Ha (Brest Business School)
    Employee ownership and bank risk: Evidence from European Banks
    Laetitia Lepetit (Université de Limoges), Phan Huy Hieu Tran (Université de Limoges), Thu Ha Tran (Brest Business School)

    Abstract :
    We investigate the impact of employee ownership on bank risk. We find that a greater proportion of employee ownership leads to lower bank risk. Employee ownership reduces bank risk in both widely- and closely-held banks, but the impact is significantly stronger in closely-held banks. We find that bank capitalization plays an important role in shaping the relationship between employee ownership and bank risk. Although employee ownership reduces the risk of widely-held banks, independently of banks’ capital leverage, it only reduces the risk of closely-held banks if banks are well-capitalized. Moreover, we find that although the impact of employee ownership on bank risk is weaker during the crisis period, employee ownership reduces bank risk significantly both in normal times and in times of crisis. To identify the causal effect of employee ownership, we use the first year of employee ownership implementation as an instrumental variable.
  • Jeudi 25 mars 2021 - Valerio Sterzi (Université de Bordeaux, GREThA)
    Patent Acquisitions by Patent Assertion Entities and Follow-on Innovation: Evidence Based on USPTO Patent Transfers
    Gianluca Orsatti and Valerio Sterzi

    Abstract :
    We provide original evidence on the role of patent assertion entities (PAEs) for follow-on innovation by looking at the transfers of USPTO patents. Our evidence is threefold. First, PAEs build selected patent portfolios and contribute significantly to patent transfers in the US. Second, their impact on follow-on innovation is, on average, negative. With a series of dynamic diff-in-diffs analyses, we estimate a post-transfer drop in forward citations received by patents acquired by PAEs. This drop is not immediate but takes some years to materialize. Third, heterogeneous PAEs business models co-exist, with different implications for innovation: large patent aggregators mainly drive the negative effect on follow on innovation that we observe on average. Conversely, technology development and independent licensing companies seem to not behaving differently than other producing companies in terms of using and/or allocating acquired patents.
  • Jeudi 11 mars 2021 - Carine Staropoli (Paris School of Economics)
    New procurement rules boost the uptake of Green Public Procurement: Evidence from Colombia
    Isac Olave , Carine Staropoli

    Abstract :
    Public procurement rules govern the way public authorities purchase goods, works and services. These rules follow some basic principles (transparency, equal treatment, open competition, and sound procedural management) which should ensure best value for money while avoiding any favoritism, corruption, or discretionary power. As for any rules, there is no such thing as a free lunch: their design, implementation and enforcement raise transaction costs which hampers public procurement efficiency. Worldwide, governments are trying to improve public procurement practices through simplified procedures and new auction design often based on digitalization (so-called e-procurement). At the same time, governments are tempted to use public procurement as a lever in a more strategic manner than simply procuring to contribute to a more innovative, sustainable, inclusive, and competitive economy. Typically, so-called Green Public Procurement (GPP) is becoming a real environmental policy instrument complementing the traditional instruments (regulation, command-and-control, taxation). Taking advantage of the high purchasing power of public buyers (in OECD countries, public procurement accounts for around 15% of GDP), GPP can help stimulate and accelerate a critical mass of demand for more sustainable goods, works and services. In practice, GPP consists in including clear and verifiable green criteria for goods, works and services in the public procurement process at the risk of increasing the transaction costs due to the extra uncertainty and complexity it might bring into the process. Which in turns raises the following question: Is GPP compatible with the implementation of new procurement rules aiming at improving efficiency? We empirically address this issue based on the Colombian procurement policy which is characterized by digitalization, stronger incentives to uptake GPP, and rules for abbreviated selection of suppliers for simplification. Indeed, Colombia has recently designed a simplified and digitalized procurement rule aiming at decreasing transaction costs at the supplier selection stage. Following a regression discontinuity design and controlling for the endogeneity of the assignment variable, our findings suggest that efficient procurement rules increase the uptake of GPP especially for low-value contracts.
  • Jeudi 25 février 2021 - David Le Bris (Toulouse School of Business)
    Santa Anna Effects on Education in Brittany
    David le Bris & Olivier Gergaud

    Abstract :
    Patron of Brittany, St. Anna is traditionally represented teaching her daughter Mary to read. This representation is a strong symbolic support for education. We identify the 108 communes with a specific sanctuary dedicated to Anna. After controlling for a large set of factors, Ste Anna towns exhibit higher rates of High school graduates among the population. The relationship decreases with distance to sanctuaries while the presence of Ste Anna primary schools and the occurrence of Anna surname are without any effect, supporting the idea that the channel is the attendance to religious services. A similar analysis carried out with St. Barbe, a martyr of women rights, does not lead to a similar positive effect supporting the idea that educative symbol is at play.
  • Jeudi 17 décembre 2020 - Ambre Nicolle (ENSAI)
    The Rise of Confusopoly: Evidence from the UK mobile market
    Co-auteurs: Christos Genakos (Université de Cambridge) et Tobias Kretschmer (LMU Munich)

    Abstract :
    In this paper, we shed light on how firms strategically behave in a competitive setting in terms of portfolio size, product variety, and prices. We use a detailed data set of virtually all mobile tariffs offered in the United Kingdom between January 2010 to September 2012. Using various regressions, we highlight that, contrary to the theoretical prediction, prices and variety do not always evolve in the same direction. We suggest possible explanations for this observation. In particular, we argue that firms used obfuscation strategies to create confusion and make it difficult for consumers to compare tariffs. We show that the leverage used was the combinations of tariffs with handsets.
  • Jeudi 10 décembre 2020 - Alexandre Volle (Université Paris Dauphine-PSL)
    Do New Politicians Make New Politics ?
    Co-auteurs: Antoine Cazals et Bilal El Rafhi

    Abstract :
    This paper explores the reasons behind the craze towards the representatives who recently come from the "Civil Society" accessing politics key positions. Our database is focusing on the members of parliament in France for the period of 2012-2020. Two tracks are specifically investigated, their ability and their voting behavior. Measuring and defining these aspects are per se empirically challenging. For the former, we find a learning curve for these new politics concerning their legislative activities. The size and the dynamic of the party also impacts the activity of the MP. For the latter, we define a new methodology that assesses the difference of policy preferences between experienced politics and new politics. The result lies in the importance of political selection made by political parties to know whether the new politicians bring diversity to the institution that votes national policies.
  • Jeudi 26 novembre 2020 - Noémie Pinardon-Touati (HEC Paris)
    Does Government Debt Crowd Out Corporate Investment? A Bank Lending Channel

    Abstract :
    Bank loans are an important source of financing for governments, accounting for 19% of total public sector debt in EU countries. Using the French credit register over 2006-2018 and leveraging variation in public sector debt dynamics at the bank-location level, I show that increases in the demand for bank debt by public sector entities causally crowd out bank lending to private corporations. When public sector entities borrow an additional 1€ from the median bank, this bank lends 0.78€ less to the private sector, with sizeable effects on firm-level investment. My results suggest that crowding out effects may substantially reduce (local) fiscal multipliers.
  • Jeudi 12 novembre 2020 - Sabine Duvaleix-Tréguer (Agrocampus Ouest)
    Vertical organisation of cooperatives and members’ performance: an application to hog production
    Co-auteur: Carl Gaigné

    Abstract :
    We study how the boundary of hog producer organisations affects the economic performance of their members. Using a French database providing economic and technical information on 926 hog farms, we evaluate marginal costs and margins at the farm level depending on the type of producer organisations. We find that the effects of vertical integration on the economic performance of farmers can be quite large. Belonging to a hog producer organisation that develops financial links upstream and downstream allows farmers to achieve, all things being equal, lower marginal costs and higher margins than farmers belonging to producer organisations without financial links.
  • Jeudi 5 novembre 2020 - Stefanija Veljanoska (Rennes 1)
    How the wind blows: Air pollution and child growth in India
    Co-auteurs: Anca Balietti et Souvik Datta

    Abstract :
    We analyze child growth indicators in India, matching national survey data to satellite air pollution and climate information. In a grid structure of the Indian territory, we identify exogenous variation in local air pollution by quantifying pollution brought over by wind from neighboring areas. We show that an increase by one standard deviation in the yearly concentration of fine particulate matter is accountable for 2 percentage points of stunting and wasting rates. Stunting has critical long-term health and economic consequences; through its impact on stunting, pollution exacerbates the height premium in earnings, with girls being taxed more than boys.
  • Jeudi 22 octobre 2020 - Nicolas Clootens (AMSE)
    The Environmental Unsustainability of Public Debt: Non-Renewable Resources, Public Finances Stabilization and Growth
    Co-auteurs: Francesco Magris

    Abstract :
    This paper introduces a public debt stabilization constraint in an overlapping generation model in which non-renewable resources constitute a necessary input in the production function and belong to agents. It shows that stabilization of public debt at high level (as share of capital) may prevent the existence of a sustainable development path. Public debt thus appears as a threat to sustainable development. It also shows that higher public debt-to-capital ratios (and public expenditures-to-capital ones) are associated with lower growth. Two transmission channels are identified. As usual, public debt crowds out capital accumulation. In addition, public debt tends to increase resource use which reduces the rate of growth. We also show that the economy is characterized by saddle path stability. Finally, we show that the public debt-to-capital ratio may be calibrated to implement the social planner optimal allocation.
  • Jeudi 15 octobre 2020 - Renaud Bourlès (AMSE)
    Prudential Regulation in Financial Networks
    Co-auteurs: Mohamed Belhaj et Frédéric Deroïan

    Abstract :
    We analyze risk-taking regulation when financial institutions are linked through shareholdings. We model regulation as an upper bound on institutions' default probability, and pin down the corresponding limits on risk-taking as a function of the shareholding network. We show that these limits depend on an original centrality measure that relies on the cross-shareholding network twice: (i) through a risk-sharing effect coming from complementarities in risk-taking and (ii) through a resource effect that creates heterogeneity among institutions. When risk is large, we find that the risk-sharing effect relies on a simple centrality measure: the ratio between Bonacich and self-loop centralities. More generally, we show that an increase in cross-shareholding increases optimal risk-taking through the risk-sharing effect, but that resource effect can be detrimental to some banks. We show how optimal risk-taking levels can be implemented through cash or capital requirements, and analyze complementary interventions through key-player analyses. We finally illustrate our model using real-world financial data and discuss extensions toward including debt-network, correlated investment portfolios and endogenous networks.
  • Jeudi 8 octobre 2020 - Thomas Seegmuller (AMSE)
    Are the liquidity and collateral roles of asset bubbles different?
    Lise Clain-Chamosset-Yvrard (Université de Lyon 2, GATE), Xavier Rauric (Université de Barcelone) et Thomas Seegmuller (Aix-Marseille université, CNRS, EHESS, Centrale Marseille, AMSE)

    Several recent papers introduce different mechanisms to explain why asset bubbles are observed in periods of larger growth. These papers share common assumptions, heterogeneity among traders and credit market imperfection, but differ in the role of the bubble, used to provide liquidities or as collateral in a borrowing constraint. In this paper, we introduce heterogeneous traders by considering an overlapping generations model with households living three periods. Young households cannot invest in capital, while adults have access to investment and face a borrowing constraint. Introducing bubbles in a quite general way, encompassing the different roles they have in the existing literature, we show that the bubble may enhance growth when the borrowing constraint is binding. More significantly, our results do not depend on the - liquidity or collateral - role attributed to the bubble. We finally extend our analysis to a stochastic bubble, which may burst with a positive probability. Because credit and bubble are no more perfectly substitutable assets, the liquidity and collateral roles of the bubble are not equivalent. Growth is larger when bubbles play the liquidity role, because the burst of a bubble used for liquidity is less damaging to agents who invest in capital.
  • Jeudi 1 octobre 2020 - Philippe Delacote (Inra Nancy)
    Weather shocks and adaptation: what impacts on land-use change and deforestation ?
    Co-auteurs: Julia Girard, Antoine Leblois, Giuglia Vagglietti

    Forests provide coping services against extreme events for farmers in vulnerable rural areas of many developing countries. In turn, those events, like droughts, are likely to influence the land-use choices of those agents. This paper assesses how droughts can impact land-use change and deforestation. Focusing on Sub-Saharan Africa, and using satellite data, our empirical results support our theoretical findings: in a context where forest can provide safety nets to poor rural households, higher risk of droughts is related to lower agricultural expansion and deforestation. We use a high resolution annual dataset on tree losses, vegetation types, human activities and rainfall in Western and Central Africa to derive the impact of between human activities, and more precisely agriculture, and tree loss.
  • Jeudi 24 septembre 2020 - Avner Seror (AMSE)
    Religious Leaders and Rule of Law

    In this paper, we provide systematic evidence of how historical religious institutions affect Rule of Law. In a difference-in-differences framework, we show that districts in Pakistan where the historical presence of religious institutions is higher, Rule of Law is worse. This deterioration is economically significant, persistent, and explained by the rise of religious leaders elected to office. We explain our findings with a model where religious leaders leverage their high legitimacy to run for office and influence Courts. Our estimate of the economy-wide losses attributed to land expropriation by religious leaders through Courts is about 0.06 percent of GDP every year. (JEL K10, K40, Z12)

Années antérieures / Previous Years


Jeudi 30 avril [séminaire virtuel]
Manon Garrouste - Université de Lille, LEM
Neighborhood Peer Effects and Track Choices - co-écrit avec Camille Hémet

Jeudi 5 Mars 2020
Bert D'Espallier - Ku Leuven
Should informal financial groups at the bottom of the pyramid be linked to banks? A comparative analysis of linked and un-linked groups

Jeudi 20 février 2020
Grégory Ponthière - Université Paris Est Créteil
Childlessness, Childfreeness and Compensation

Jeudi 13 février 2020
Aref Mahdavi Ardekani - CES, Université Paris 1 Panthéon Sorbonne
Interbank network characteristics, monetary policy "News" and sensitivity of bank stock returns

Jeudi 6 février 2020
Christoph Heinzel - INRA, SMART-LERECO
Robustness of Inferences in Risk and Time Experiments to Lifecycle Asset Integration

Jeudi 30 janvier 2020
Michail Batikas - Rennes School of Business
European Privacy Laws, Global Competition and the Privacy Landscape

Jeudi 23 janvier 2020
Frédéric Karamé - Le Mans
On Non-linearities in Unemployment

Jeudi 16 janvier 2020
Delphine Lahet - LAREFI, Université de Bordeaux
Internationalization of Emerging Market Currencies and Original Sin: Empirical evidence of a threshold effect (co-écrit avec Stéphanie Prat)

Jeudi 9 janvier 2020
Ekrame Boubtane - Université Clermont Auvergne - CERDI
On Non-linearities in Unemployment

Jeudi 19 décembre 2019
Etienne Dagorn - CREM, Université de Rennes 1
The determinants of school achievement : experimental evidence Jeudi 12 décembre 2019
Gabrielle Fack - LEDA, Université Paris-Dauphine - PSL
The Effects of Affirmative Action on Targeted and Non-Targeted Students: Evidence from Low-Income Priorities in Paris High School

Jeudi 28 novembre 2019
François Pannequin - CREST, École Normale Supérieure Paris-Saclay (ENS)
How Compulsory Insurance Triggers Self-Insurance Among Risk Lovers? An Experimental Evidence

Jeudi 21 novembre 2019
Noémi Navarro - GREThA, Université de Bordeaux
Shock diffusion in large regular networks: the role of transitive cycles

Mercredi 20 Novembre 2019
Robert G. Hammond, University of Alabama
Using Market Design to Improve College Transfers of Student-Athletes

Jeudi 14 novembre 2019
Ju Qiu - Université Paris Dauphine
Social Media, Corporate Scandal and Firm Value

Jeudi 7 Novembre 2019
Bruno Larue - Université Laval
Zeros, Near Zeros and Gravity with Endogenous Market Structures : The Case of Maple Syrup Exports

Jeudi 24 octobre 2019
Thomas Le Texier - CREM, Université de Rennes 1
Multimarket Contact and Platform Competition: Reassessing the Mutual Forbearance Hypothesis

Jeudi 17 octobre 2019
Sebastian Irigoyen, Jacques Minlend, Louise Narbonne
Présentation des projets de thèse des nouveaux doctorants

2018 - 2019

Jeudi 28 septembre 2017 - 12h15 à 13h30 (Salle Imapp) :
Diego Useche (CREM, Université de Rennes 1)

Jeudi 12 octobre 2017 - 12h15 à 13h30 (Salle Imapp) :
Alexandre De Cornière (TSE, Université Toulouse 1 Capitole)

Mardi 24 octobre 2017 - 12h15 à 13h30 (Salle Imapp) :
Professeur invité Robert Hammond (North Carolina State University)

Jeudi 9 novembre 2017 - 12h15 à 13h30 (Salle Imapp) :
Mathieu Couttenier (Université de Genève)

Jeudi 16 novembre 2017 - 12h15 à 13h30 (Salle Imapp) :
Francesco Lissoni (GREThA, Université de Bordeaux) Jeudi 23 novembre 2017 - 12h15 à 13h30 (Salle Imapp) :
Benjamin Monnery (GATE LES, Université Lyon 2)

Jeudi 30 novembre 2017 - 12h15 à 13h30 (Salle Imapp) :
Marc Sangnier (AMSE)

Jeudi 11 janvier 2018 - 12h15 à 13h30 (Salle Imapp) :
Carole Haritchabalet (TSE, Université de Pau et des Pays de l'Adour)

Jeudi 18 janvier 2018 - 12h15 à 13h30 (Salle Imapp) :
Laurent Weill (LaRGE, EM Strasbourg)

Jeudi 25 janvier 2018 - 12h15 à 13h30 (Salle Imapp) :
Mouez Fodha (PSE, École des hautes études en sciences sociales)

Jeudi 1er février 2018 - 12h15 à 13h30 (Salle Imapp) :
Jérôme Pouyet (PSE, ENS Paris)

Jeudi 8 février 2018 - Journée doctorale

Jeudi 15 février 2018 - 12h15 à 13h30 (Salle Imapp) :
Mathieu Lefebvre (BETA, Université de Strasbourg)

Jeudi 22 mars 2018 - 12h15 à 13h30 (Salle Imapp) :
Patrice Bougette (GREDEG, Université de Nice Sophia Antipolis)

Jeudi 29 mars 2018 - 12h15 à 13h30 (Salle Imapp) :
Céline Gimet (Sciences Po Aix)

Jeudi 5 avril 2018 - 12h15 à 13h30 (Salle Imapp) :
Rustam Romaniuc (LEM, ETHICS (Université Catholique de Lille)

Jeudi 12 avril 2018 - 12h15 à 13h30 (Salle Imapp) :
Douadia Bougherara (INRA LAMETA - Montpellier)

Jeudi 19 avril 2018 - 12h15 à 13h30 (Salle Imapp) :
Paul Belleflamme (AMSE - Marseille)