LAW, INSTITUTIONS AND ECONOMICS IN NANTERRE (LIEN)

Résumé: As artificial intelligence increasingly informs consequential decisions, its value depends not only on predictive accuracy but also on how people perceive, interpret, and act upon its advice. I will present a research pipeline of two published and one ongoing experimental studies examining human–AI decision making across financial and medical settings. The first study investigates whether presenting comparative prediction performance changes individuals’ degree of taking algorithmic rather than human advice, illuminating the conditions that foster algorithm appreciation. The second uses a field experiment in financial investment advisory to examine how AI support reshapes the interactions among clients, human advisors, and algorithmic systems—and ultimately affects investment decisions. The third, ongoing study, on which I will spend most of the time, investigates visual AI explanations in medical diagnosis. It shows how commonly used visual explanations can accelerate physicians’ decisions while potentially encouraging excessive reliance on AI-indicated visual evidence and increasing overdiagnosis. Together, the studies reveal that the effects of AI advice extend beyond improvements in prediction. Performance information, human oversight, and AI explanation design influence trust, reliance, decision speed, and error. The seminar develops a broader perspective on designing human–AI decision systems that improve performance without amplifying automation bias or unintended behavioral consequences.

En collaboration avec Matthieu Chtioui.

Résumé: With the growth of digital platforms, micro-firms' now represent 96% of all French companies. Yet, little is known about their ability to evade taxes and how tax evasion is related to their recent growth. Using a unique French administrative survey requiring digital platforms to disclose their sellers' sales, we compare true revenue to those reported through tax declarations in the ride-sharing sector. We find that tax fraud is pervasive and induces significant market distortions. Using variation in drivers receiving a pre-filled income tax return with their platform revenues, we rely on a instrumental variable design to investigate the effect of income tax fraud on labor supply and taxes paid. We find that income tax fraud induces a significant increase in labor supply and a decrease in average ride prices, along with lower paid taxes. We conclude that policy initiatives, such as the "deemed supplier'' aiming to use platforms as tax collectors holds the promise to limit tax evasion and raise tax revenue.  

Abstract: We investigate gender differences in economic outcomes on the largest carpooling platform in Europe, combining correspondence studies, scraped platform data and survey experiments. We find that although female drivers are strongly preferred by passengers, they do not earn higher revenues. We reconcile this paradox by showing that female drivers screen out passengers more than men do, driven by differences in perceived risk and tolerance for potentially unsafe passengers.

Abstract : Victims of sexual violence rarely report these crimes to the police. In the U.S., universities have an obligation to provide education free from sex discrimination, including sexual violence, under Title IX. In 2011, the U.S. Department of Education released updated guidance on Title IX compliance, which emphasized universities’ responsibility to investigate sexual violence cases in a fair and timely manner. I leverage this national shock to estimate the effect of increased salience and oversight on reports of sexual violence in annual crime data collected by all U.S. universities. In a difference-in-differences framework, I compare sexual violence crime rates to other violent crime rates before and after 2011 and find that there are 0.62 additional sexual violence reports per 1,000 students enrolled, an 87 percent increase relative to the mean of sexual violence reports. Survey evidence suggests that information provision to students is responsible for the reporting increase, while novel data on historical Title IX policies provides no evidence that mandatory reporting policies play an important role.

Abstract: We study the role of office-holders in the formation of political preferences during childhood. Leveraging data on 200 million registered voters and a regression discontinuity design based on gubernatorial elections, we show that U.S. state governors systematically shift voters’ partisan alignment toward their own party. The effects are concentrated among individuals who were between the ages of 6 and 17 during a governor’s tenure. Each additional year of exposure to a Republican governor during childhood increases the probability of Republican registration in adulthood by 0.45 percentage points or about 1.8 percentage points over a four-year term. We further document lasting impacts on primary participation and survey-based attitudes. The estimates are stronger for governors who are more visible and popular, and in settings where they enjoy greater discretionary authority, especially over education policy.

with Vincent Théroude

Abstract: How jurors form reasonable doubt under uncertainty is investigated in a two-stage online experiment that separates wrongdoing from evidence evaluation. First, participants earn income and may steal from a matched victim; theft can also occur mechanically with 50% probability, creating uncertainty about intent. Second, independent jurors observe an informative but imperfect signal (with known precision). Jurors’ priors, posteriors, and verdicts are elicited to estimate individual conviction thresholds—an operational measure of reasonable doubt. Willingness to pay is also elicited to implement majority decisions and to correct wrongful verdicts. Variation in thresholds and justice preferences is linked to demographics, preference parameters, and probabilistic reasoning.

Abstract : Building on multiple administrative judicial French databases, this paper aims to quantitatively estimate the effects of placing juvenile delinquents in Closed Educational Centers (CEFs). Presented as an alternative to incarceration when other forms of open placement have failed, CEFs aim to create a temporary break for minors from their usual environment by involving them in intensive educational and professional activities and providing enhanced, personalised supervision. Leveraging the progressive deployment of CEFs across French departments, I examine the effects of this placement on the reiteration of delinquent acts. In the longer run, this paper also aims to estimate the effects on (i) return to education and training, (ii) employment and (iii) health outcomes, as well as to explore mechanisms that may explain observed disparities, including peer effects.

Abstract : This paper evaluates how the medical activity of gynaecologists is affected when facing increased competition from midwives in the context of France. In a context of increasingly overlapping scopes of practices, we identify the change in the volume and composition of gynaecologists activity following the entry of a midwife in their catchment area. We exploit rich exhaustive administrative data from the French national health insurance (Système National des Données de Santé) over the period 2016-2019. We implement a staggered difference-in-difference approach and consider the heterogeneity of responses depending on the price convention of gyanecologists. In our current results, we find that the entry of a midwife leads gynaecologists to increase their activity, whatever their price convention. We find no clear effect on the composition of the medical activity.

Abstract: A large body of research shows that trust is highly responsive to signals of a partner’s trustworthiness, yet rule-following has received little attention. We experimentally examine the signaling role of compliance by combining a rule-following task with a trust game, allowing us to study both the production and perception of the signal. We find that rule-followers are trusted more and reciprocate more. While rule-following increases slightly with observability, this effect does not appear to be driven by strategic motives, nor do observers suspect such motives. These results suggest that rule compliance functions as a credible signal in social exchange.

Abstract: The dark figure of crime confounds the true prevalence with enforcement, since detection and crime are observed only in conjunction. We introduce a novel Maximum Likelihood estimator that simultaneously estimates probabilities of two latent outcomes — crime and enforcement — using instrumental variables. Identification relies on exogenous instruments excluded from shifting the probability of crime or enforcement occurring to disentangle the selective sample from its population. In a corporate cybercrime application in two Swiss cantons, the reported monthly rates (0.03% and 0.01%) severely mask the true prevalence; estimated rates are 2.4% to 17.9%, with dark rates exceeding 99%.

Résumé: : A platform-affiliated retailer competes in prices with third-party sellers over two periods. After the first period, the affiliate has access to market-wide purchase data and an informational advantage. Third-party sellers either do not obtain data (exclusive data use) or obtain only data on their own past customers (shared data use). Data access underpins price discrimination by consideration in the second period. With exclusive data use, price discrimination benefits all retailers compared to uniform pricing. The affiliate benefits more than third-party sellers. However, third-party sellers’ lack of data limits the extent to which the affiliate can use its superior information. With shared data use, all retailers benefit equally from price discrimination compared to uniform pricing. Mandatory sharing of past customer data does not harm the affiliate, although it reduces its informational advantage, and benefits third-party sellers. However, while leveling the playing field on the supply side, it harms consumers

Avec Camille Urvoy

Résumé: How do individuals decide what media to consume? This paper addresses this question by exploiting the 2025 discontinuation of two French television channels, C8 and NRJ12, whose licenses were not renewed by the regulator. Using a four-wave panel survey of 2,500 respondents—including regular viewers of the discontinued channels—we analyze how audiences reallocated their attention once these options disappeared. A difference-in-differences design distinguishes between former viewers of pure entertainment content and viewers of infotainment (through exposure to the show Touche pas à Mon Poste). Despite the reduction in available channels, overall TV consumption remained stable. Entertainment-only viewers concentrated on channels they already watched, while infotainment viewers expanded their viewing to new outlets—mostly entertainment and some generalist channels—without shifting toward political news. These patterns suggest that bundling political content with entertainment extends media reach in ways that news-only alternatives cannot. Finally, we document heterogeneous effects on political knowledge and news knowledge among infotainment viewers.

Abstract : Retailers often use salient visual elements, or marketing cues, to promote certain choices. Their impact on consumer welfare is hard to assess when products are complex and consumers differ in preferences and biases. This paper proposes two approaches to inform regulatory action from limited data. First, a choice experiment with induced values, varying visual elements within- and attribution rules between-subject. It measures welfare effects in monetary terms, depending on how closely attribution rules match consumer preferences. Some policy insights emerge even when preferences and attribution rules are unknown. Second, a structural model of consumer decision-making based on rational attention, where choices and welfare depend on information costs, beliefs about the cue, and attribution rules. Its calibration is less data-demanding than a full preference estimation, hence applicable in A/B testing. I validate the model with experimental data, and conversely, I identify necessary conditions for an externally valid experiment from the model.

Abstract :Building on multiple administrative judicial French databases, this paper aims to quantitatively estimate the effects of placing juvenile delinquents in Closed Educational Centers (CEFs). Presented as an alternative to incarceration when other forms of open placement have failed, CEFs aim to create a temporary break for minors from their usual environment by involving them in intensive educational and professional activities and providing enhanced, personalised supervision. Leveraging the progressive deployment of CEFs across French departments, I examine the effects of this placement on the reiteration of delinquent acts. In the longer run, this paper also aims to estimate the effects on (i) return to education and training, (ii) employment and (iii) health outcomes, as well as to explore mechanisms that may explain observed disparities, including peer effects.

Abstract: This study investigates the achievability of digital sovereignty within the European Union by examining website data flows, mainly focusing on non-personal data. Amid growing concerns over data governance and the resurgence of digital sovereignty as a central theme in EU policies, this research uniquely addresses firms' data storage decisions and their implications for EU users. Utilizing an original dataset of the most visited websites in France, this paper analyzes data location preferences across various sectors, revealing a complex interplay between privacy regulations, firm size, sector-specific tendencies, and the underlying internet infrastructure. The findings suggest that firms prioritize data storage in countries with strong privacy regulations and tend to locate data closer to consumers to minimize latency. However, variations are observed based on sector-specific needs and firm size, with larger and tech-oriented firms showing less sensitivity to distance. The study also highlights the significant role of the Internet's backbone infrastructure in shaping data storage strategies, pointing to potential challenges in aligning with digital sovereignty goals.

with G. Daniele, F. Passarelli, W. Sas & L. Windsteiger

Abstract : We present a theory explaining how divergent opinions about the regulation of an externality problem can lead to distrust of both political institutions and other people. Those who are more concerned about the externality distrust the government because they perceive the rule as too lenient. Those who are less concerned blame the government because they have to comply with a rule they consider useless. In addition, the rule shapes individuals’ expectations of civic behavior in society. Therefore, regulation can lead to disappointment and interpersonal distrust when others do not follow the rules. Those who are more concerned also value civic behavior more, so they lose even more trust in others. Our survey experiment in four European countries supports these patterns in the context of the Covid-19 pandemic.

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Avec P Maarek.

Abstract : This paper investigates gender-based differences in cooperativeness among French parliamentarians by analyzing legislative behaviors, such as cosponsorship and voting patterns. Using a comprehensive dataset covering all bills and amendments authored in France’s Lower House between 2012 and 2022, the study employs multivariate regressions and a regression discontinuity design (RDD) in close elections to approximate the random assignment of gender. The findings reveal that female parliamentarians attract fewer cosponsors, particularly from members of their own parties, despite being more likely to support their colleagues’ initiatives and exhibit higher voting participation. This asymmetry highlights a paradox: while female legislators display greater cooperative and altruistic behaviors, they receive less reciprocal backing, limiting their legislative influence. The observed patterns are driven by behavioral gender differences rather than differences in observable characteristics, thematic alignment, or the quality of the politicians.

Avec Mario Daniele Amore (Bocconi University & CEPR) et Sebastian Schwenen (Technical University of Munich & DIW Berlin)

Avec Mario Daniele Amore et Sebastian Schwenen.

Abstract: Safety compliance typically varies across firms, even in high-risk industries under strict regulation. Analyzing U.S. nuclear power plants, we find that plants located farther from the regulator’s regional office have lower levels of emergency training. This disparity arises from the assignment of less experienced inspectors to more distant plants, with the arrival of less experienced inspectors being associated with a reduction in emergency training. Our findings show that inspector assignment practices are crucial in shaping regulatory effectiveness and safety outcomes.

Abstract: We address the issue of allocating the costs of cleaning non-point source pollution originating from industrial sites among the firms responsible for these sites. The bilateral liabilities between firms are depicted by an undirected graph. We introduce and axiomatically characterize two cost allocation rules, which are inspired from the Polluter-Pays and Beneficiary-Pays principles commonly referenced in environmental law.
The first rule allocates the cleanup costs of a site equally among the firms potentially contributing to the environmental damage. In contrast, the second rule assigns each firm the full cost of cleaning its own production site. Furthermore, we establish links with cooperative game theory to demonstrate the stability of these allocation rules.

Abstract: This paper investigates media attitudes towards migration in the aftermath of terrorist attacks and examines their impact on voting outcomes. Using natural language processing (NLP) methods, we analyze French news articles on immigration before and after three major terrorist events in 2015 and 2016. Our findings show that the salience of immigration in the French media (especially National media) increased for up to eight weeks following the attacks. In particular, in the first three weeks, where immigration was evoked with Muslims or (in)security-related issues, salience increased fivefold. Furthermore, the tone of reporting became significantly more negative, though this effect was shorter in duration, albeit lasting for at least two weeks. Further, we show how this change in media behaviour have participated to the increase in votes in favor of the main anti-migrant party in France, at the Élections Régionales, held 3 weeks after the November 13 attack. We could estimate a contribution of the media's change in behaviour to the total rise in votes for the Far-right of about 2% on average. In some French localities however, we estimated the contribution to reach more than 12%.

Résumé: This paper investigates the impact of price transparency on equilibrium prices and fees by considering a policy change implemented by Airbnb that affected the transparency of cleaning fees for IP addresses from the European Union (EU). Using a difference-in-differences approach, we find a reduction in cleaning fees of 2-4%. Consistent with our theoretical framework, we also find that listings without a cleaning fee, something that is common on Airbnb, appear more affordable after the policy change and react by increasing their nightly price by 5-6%. We argue that this result is driven by some hosts learning about the full prices of their rivals due to the transparency policy, finding themselves more affordable. This analysis uncovers a new mechanism through which greater price transparency can lead to price increases.

Abstract : We build a model where an online hosting platform develops a copyright filter to screen content that contributors wish to upload. The technology is imprecise, since non-infringing material may be incorrectly filtered out. Once the content is hosted on the platform, a right-holder may send a take-down notice if its own monitoring system, also imprecise, finds it to be copyright infringing. The efficient design of regulation and liability calls for (i) giving the right-holder incentives to evaluate fair use when submitting a notice and (ii) lifting the safe-harbor protection granted to platforms that promptly remove content following a take-down notice.

Abstract: The adtech industry plays a key role in facilitating connections between digital publishers and advertisers. This paper studies the impact of vertical integration between an intermediary and a major publisher on the online advertising ecosystem and the provision of content. We find that vertical integration enables the intermediary to leverage exclusive access to data, leading to dominance in the intermediation market. As a result, the integrated intermediary is able to collect a larger ad-tech tax from independent publishers by shading its bid for impressions. This practice reduces investments in content by independent publishers, while the integrated publisher increases its investment. Therefore, the net effect of vertical integration on consumer welfare and total welfare can be positive or negative. We discuss potential policy interventions that restore the outcome as under vertical separation.

Abstract: Swedish district courts have undergone a major mergers and acquisitions program between 2000 and 2010 to centralize activity in larger and fewer courts. The purpose of this contribution is to conduct an efficiency analysis of these courts to identify the eventual efficiency gains. Distinguishing mainly between technical and scale efficiency and determining the returns to scale of individual observations, we try to find the potential rationales behind this merger wave. We are to the best of our knowledge the first to combine traditional convex with nonconvex nonparametric frontier methods to calculate efficiency before and after the mergers. It turns out that the nonconvex methods provide a more cogent ex post explanation of this historical merger wave aimed at increasing the size of operations. A battery of recent convexity test statistics reject convexity in favour of nonconvexity.

Abstract: We use linked U.S. Census data to study the intergenerational mobility of Jewish immigrants in the first half of the 20th century using Yiddish mother tongue as marker for Jewish origin. Across the distribution of fathers' occupational statuses, Jewish immigrants' sons climbed higher on the socioeconomic ladder than non-Jewish immigrants' and non-immigrant white Americans' sons. In addition, for Jewish sons, fathers' occupational status counted less for social ascent. Education played a critical role in this success. However, a residual `Jewish factor' accounts for as much as education in explaining achievements in earnings, entrepreneurship, or occupational status. We document the roles of network effects, family size, investment strategies, and geographical mobility as possible channels for such divergence in intergenerational mobility. No plausible amount of unobservable selection could cancel these results.

Avec H. Allouard, G. Cecere, J. de Sousa, O. Marie

Abstract: We investigate the impact of the rise of on-demand food delivery platforms on local employment and crime rates, leveraging the temporal and geographic disparities in their introduction in France. Our staggered difference-in-differences approach reveals that the arrival of a delivery platform in an employment area increases job opportunities for unqualified jobs, as evidenced by a rise in registered riders. This increase in employment opportunities concurrently leads to a large reduction in drug-related crimes. These results indicate that the gig economy fosters employment opportunities for low-skilled workers, youth, and migrants, facilitating their engagement in lawful economic activities.

With Ester Manna & Shubranshu Singh
Abstract : Generative AI systems often suffer from AI hallucinations in that they may provide confident responses unjustified by their training data. Given the increasing reliance on generative AI systems, it is hard to overstate the perils of AI hallucinations. In this paper, we explore the question of whether AI developers or human decision makers should be liable for the harm the AI systems may cause. We develop a novel theoretical framework to study and compare implications of liability for developers of AI systems versus liability for human decision makers. We find that in some cases AI developer liability can interestingly result in over-supervision and under-adoption by the human decision makers. Although AI operator liability leads to efficient accuracy investment when AI accuracy is publicly observed, developer liability results in higher accuracy investment when it is privately observed by the developer. We show that the optimal allocation of liability may change over time, depending on the evolution of the technology.

Abstract: We examine national security policies implemented by the Committee on Foreign Investment in the United States (CFIUS) and how they affect corporate investment. CFIUS can deny regulatory approval of foreign takeovers on national security grounds. We document a sharp increase in CFIUS denials of regulatory approval during the 2008-2019 sample period in which the Foreign Investment and National Security Act (FINSA) was in place. CFIUS denials are followed by a negative market reaction, a decrease in foreign takeovers, and a reduction in corporate investment in industries of the blocked-acquisition targets. The decreases in corporate investment are more pronounced among firms that are ex-ante financially constrained. Our results may be of interest to regulators who have recently adopted CFIUS-like mechanisms to protect critical assets from foreign hands.

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with Sergei Guriev, Emeric Henry, and Ekaterina Zhuravskaya

Co-écrit avec Matthieu Belarouci & Vincent Lenglin

Abstract :We experimentally study conciliation, an intervention aimed at improving bargaining efficiency. In conciliation, a neutral third party collaborates with the parties by suggesting resolutions to promote agreements. Unlike delegation or arbitration, conciliation fully preserves the autonomy of the parties. Unlike mediation, the conciliator cannot filter information. Whether conciliation can improve bargaining efficiency is an open question. In our laboratory experiment, two "litigants" bargain over the split of a loss in an unstructured protocol. In case of failure, a random split is implemented. In some conditions, a third party, the conciliator takes part in the bargaining by submitting non-binding suggestions to the litigants. We find that, on average, conciliation does not affect the likelihood of failure or the splits that are agreed upon by litigants. However, for bargaining pairs composed of selfish litigants, conciliation leads to more equal agreements. Conciliation also reduces bargaining delays: the time and the number of offers necessary to converge to an agreement are significantly reduced in the presence of a conciliator.

with M. Rosholm & M. Simonsen

Avec Christian Peukert

Abstract : This paper provides a theoretical framework to consider the effects of profit-driven media as an information provider about criminal issues on criminal behaviors and avoidance behaviors of victims. Then, we show that profit-driven news media reporting can be biased and over-misrepresented about criminal situations. This leads to an increased demand for crime news reporting of offenders and victims and causes inefficient behaviors compared to the social welfare perspective. This kind of distortion can be happened by the informal sanction provided by the profit-driven media. These help us to discuss direct and indirect interactions between criminal policies and intervention for media industries.

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Co-auteur: M. Schwarz

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Avec A. Fogli

Abstract: We study the impact of internal migration on the U.S. fertility transition in the Nineteenth century. We show that fertility declined faster in counties characterized by a higher outward migration, especially towards the Western frontier. We exploit the number of acres granted to veterans of the American wars to estimate the causal effect of migration on fertility decline. Our theory is based on the diffusion of new family values governing intergenerational behavior with respect to saving and fertility. Migration and the lack of remittance technology lowered expected transfers from children, and incentivized precautionary savings of parents. Results are robust to several measures of fertility and internal migration.

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Co-auteure: Johannes Loh

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Co-auteur: E. Ash

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Co-auteurs: Simon Briole et Laura Khoury

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Article à l'appui de la présentation : lien

Avec Grazia Cecere and Sarah Lemaire

co-auteur: Patrick Legros

co-auteur: B. De los Santos

https://papers.ssrn.com/sol3/papers.cfm?abstract_id=3818193

coécrit avec M. Ayouni

co-écrit avec Ph. Mongin

co-écrit avec C. Desrieux

co-écrit avec Renato Gomes

avec Bastien Michel

https://www.dropbox.com/s/rbgsgpzbmck61jv/DP15047-2.pdf?dl=0

http://ftp.iza.org/dp13961.pdf

avec Olivier Bargain et Imen Hentati

coécrit avec G. Lacroix et S. Marchand

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avec Thomas LE TEXIER, Zhiwen LI and Thierry PENARD

avec S. Esquerre

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coauthored with Ricardo Pérez-Valls

avec Marcel Fafchamps

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[Présentation]

coécrit avec Elliott Ash, Julia Cagé et Nicolas Hervé

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Authors: Lela Mélon, Rok Spruk

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co-écrit avec Adam Levai et Michèle Schmiegelow

co-écrit avec Ewen Gallic

co-écrit avec Ariana Levinson et Erin O’Hara O'Connor

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with Marco Buso and Luigi Moretti

co-écrit avec Jean Beuve

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co-écrit avec Claudio Piga et Carlo Reggiani

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with Helena Perrone (Mannheim University)

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co-écrit avec Fabrice Le Guel et Vincent Lefrere

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In this paper, we use a unique database on switching between mobile handsets in a sample of about 8,623 subscribers using tariffs without handset subsidy from a single mobile operator on monthly basis between July 2011 and December 2014. We estimate a discrete choice model in which we account for disutility from switching to a different operating systems and handset brands and for unobserved time-persistent preferences for operating systems and brands. Our estimation results indicate presence of significant state-dependency in the choices of operating systems and brands. We find that it is harder for consumers to switch from iOs to Android and other operating systems than from Android and other operating systems to iOS. Moreover, we find that there is significant time-persistent heterogeneity in preferences for different operating systems and brands, which also leads to state-dependent choices. We use our model to simulate market shares in the absence of switching costs and conclude that the market share of Android and smaller operating systems would increase at the expense of the market share of iOs.

co-écrit avec Lukasz Grzybowski

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co-écrit avec Mark Schankerman

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Abstract : In this paper we investigate the impact of local competition for public funds on conflict in Indonesia. We use a triple differences approach that exploits an exogenous source of variation in competition given by the number of villages that compete for sub-district level funds. We find a small but significant impact of competition on conflict. Larger effects are found for local (within-village) and ethnic-type conflict. We provide a number of potential mechanisms that might explain our findings.

co-écrit avec D.Abrams, R. Galbiati, et A. Philippe

co-écrit avec Simon Anderson

co-écrit avec Yu Hsin Lin

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avec Sébastien Grobon, Insee et Ined

co-écrit avec Robert Somogyi (CORE, UCL)

co-écrit avec Surajeet Chakravarty et David Kelsey

co-écrit avec Eric Strobl

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co-écrit avec Marco Buso

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co-écrit avec Claude Fluet

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co-écrit avec Matteo Migheli

co-écrit avec Alexander Rasch

co-écrit avec Blaise Melly et Audrey Etienne

avec Cindy Alexander

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avec Markus Dertwinkel-Kalt

co-écrit avec Philippe Choné et Thibaud Vergé

co-écrit avec Rafael C. de M. Ferraz et Yann Ménière

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co-écrit avec Cécile Bazart

co-écrit avec Thierry Blayac (Université de Montpellier, LAMETA)

co-écrit avec Florian Baumann et Tim Friehe

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co-écrit avec Mathieu Lefebvre

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co-écrit avec Decio Coviello, Luigi Moretti et Giancarlo Spagnolo

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co-écrit avec Flóra Felső et Sander Onderstal

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co-écrit avec François Pannequin

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co-écrit avec Pierre Fleckinger et Constance Monnier

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co-écrit avec Eric Darmon

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co-écrit avec Jean Berbinau (Collège de l'Hadopi)

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Séance organisée en partenariat avec l'Ecole Doctorale "Economie Organisations Société"

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co-écrit avec Winand Emons (Un. de Berne)

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with Doh-Shin Jeon

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co-écrit avec Tim Friehe, University of Bonn, Bianca Rundshagen, Universty of Hagen

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co-écrit avec Avi Tabbach

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co-écrit avec Bruno Decreuse (GREQAM, Université Aix-Marseille), Steeve Mongrain (Simon Fraser University)

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co-écrit avec Abel François (LaRGE, Université de Strasbourg) et Raul Magni-Breton (Pacte, Université de Grenoble)

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co-écrit avec Patrick Rey

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co-écrit avec Emmanuelle Auriol and Rodrigo Paillacar

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co-écrit avec Sofia Amaral-Garcia (Post-Doctorante à l'Université de Zurich)

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en partenariat avec les Ecoles Doctorales "Economie Organisation Société" et "Sciences Juridiques et Politique"

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co-écrit avec Vera Angelova (Max Planck Institute of Economics) et Giuseppe Attanasi (BETA, Université de Strasbourg)

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co-écrit avec Josephine van Zeben (Post-Doctorante à l'université d’Indiana, Vincent and Elinor Ostrom Workshop in Political Science and Policy Analysis)

co-écrit avec Francesco Parisi (Université du Minnesota, Law School)

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co-écrit avec Greg Klass (Georgetown University Law Center)

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co-écrit avec M. Cavagnac (Université de Limoges et TSE)

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co-écrit avec et Isabelle Sayn (CERCRID, Université Jean Monnet)

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co-écrit avec Victor Hiller

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co-écrit avec Johan Homberty et Nicolas Schutz

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co-écrit avec Charles Palmer (Department of Geography and Environment, London School of Economics), Riyong Kim Bakkegaard (University of Copenhagen), Bo Jellesmark Thorsen (University of Copenhagen)

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co-écrit avec Emmanuelle Taugourdeau et Sarah Brockhoff

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co écrit avec Timothy Fisher (University of Sidney)

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Séance en partenariat avec l'Ecole Doctorale de Sciences Juridiques et Politiques et son séminaire doctoral "Relations entre Science Juridique et Science Economique" coordonné par Bertrand du Marais (CRDP) et Sophie Harnay (EconomiX)

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Séance en partenariat avec l'Ecole Doctorale de Sciences Juridiques et Politiques et son séminaire doctoral "Relations entre Science Juridique et Science Economique" coordonné par Bertrand du Marais (CRDP) et Sophie Harnay (EconomiX)

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co-écrit avec Marion Desquilbet (GREMAQ, INRA,TSE)

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co-écrit avec B. Chopard et N. Nigam

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co-écrit avec Bruno Deffains et Bruno Lovat

co-écrit avec P. Charléty et MC. Fagart

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avec Carine Milcent

avec Scott E. Masten

co-écrit avec B.Crettez

co-écrit avec Bruno Deffains

avec B. Crettez

avec G. Ponthière

co-écrit avec Giovanni Mastrobuoni (Collegio Carlo Alberto)

co-écrit avec Sissel Jensen

co-écrit avec Régis Blazy

co-écrit avec Fernanda Brollo

avec J-L. Rullière

avec Emmanuelle Auriol

écrit en collaboration avec Julien Pillot

co-écrit avec N. Marceau (UQAM)

co-écrit avec R.Sausgruber et G.Fellner

co-écrit avec Bruno Deffains

coécrit avec Sylvain Dejean et Raphaël Suire

en collaboration avec Sophie Harnay

Deuxième édition de son ouvrage (Dalloz, Méthodes du droit, 2008)

John H. Boyd, Abu M. Jalal & Jin Kim,

Glaeser et Shleifer, QJE, 2002