Agenda scientifique

Fév
20
lun
2023
François Langot (Le Mans Université) – Understanding Cross-country Differences in Health Status and Expenditures : Health Prices Matter
Fév 20 @ 11 h 00 – 12 h 00

François Langot (Le Mans Université)

Abstract

Using a general equilibrium heterogeneous agent model featuring health production, we quantify the contribution of health price in explaining cross-country differences in health expenditures and health status. Considering other country-specific explanatory factors, U.S. health prices are estimated to be 25% higher than those of European countries. This price differential explains more than 60% of the difference in health expenditures and more than half of the difference in health status between Europe and the U.S. Despite its large impact at the aggregate level, these price differences increase the lifetime cost of living of Americans by two percentage points.

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Fév
21
mar
2023
Dorothée Charlier (Université Savoie Mont-Blanc, LIRIS) – Utility Services Poverty : Addressing the Problem of Household Deprivation in Mayotte
Fév 21 @ 10 h 30 – 11 h 45

Among the 17 sustainable development goals adopted by the United Nations in 2015 to eradicate poverty are ensuring (i) “availability and sustainable management of water and sanitation” and (ii) access to modern energy sources. One problem for Mahorais households is access to safe, clean and affordable essential utility services, such as electricity, water and sewerage. We define a new concept of utility services poverty (basic utility services deprivation) based on the theoretical capabilities framework of Sen and Nussbaum. Using a latent class model to evaluate utility services poverty in Mayotte Island, we identify households that are poor in utility services and characterize four household profiles on a scale of vulnerability/poverty. We demonstrate that access to water is more discriminatory than access to electricity in Mayotte. The top priority in fighting utility services poverty should be access to water and sanitary facilities. We show that utility services poverty and income poverty are distinct phenomena. Public policies that aim to support only the income poor do not solve the problems of access to utility services in Mayotte. Policies should be implemented not according to income but to facilitate water and energy access and improve basic hygiene conditions.

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Fév
27
lun
2023
Urs Fischbacher (University of Konstanz)
Fév 27 @ 11 h 00 – 12 h 00
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Fév
28
mar
2023
Manuel Foerster (Bielefeld University, Center for Mathematical Economics) – Strategic use of social media influencer marketing
Fév 28 @ 10 h 30 – 11 h 45

We build a model of social media influencer marketing in which a firm may hire influencers to inform consumers of an innovation. Influencers generate sales through purchases of their followers and followers’ social networks. While rational consumers learn product quality before purchase, naïve consumers don’t and instead follow the advice of influencers and peers. In equilibrium influencers price according to their contribution to sales, which depends on the number of followers. In turn, the firm hires an influencer if her contribution to sales exceeds the costs of producing the endorsement. The quality of the endorsement and the product price is such that it maximizes industry profits. In particular, the firm will exploit consumers’ na ̈ıvit ́e and make influencers provide exaggerated endorsements along with overpricing of the product if product quality is relatively low. We further show how equilibrium profits depend on the players’ relative market power.

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Mar
13
lun
2023
Thepthida Sopraseuth (CY Cergy Paris Université)
Mar 13 @ 11 h 00 – 12 h 00

Thepthida Sopraseuth

 

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Mar
27
lun
2023
Luigi Siciliani (University of York)
Mar 27 @ 11 h 00 – 12 h 00
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Mar
28
mar
2023
Pierre Mohnen (Maastricht University)
Mar 28 @ 10 h 30 – 11 h 45
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Avr
3
lun
2023
Zvika Neeman (Tel Aviv University)
Avr 3 @ 11 h 00 – 12 h 00
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Avr
4
mar
2023
Gaëtan Fournier (Aix-Marseille Université, AMSE) – Political competition with costly deviations
Avr 4 @ 10 h 30 – 11 h 45
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Mai
9
mar
2023
Rémy Cazabet (Université Lyon 1, LIRIS) – Data-driven analysis of Bitcoin transactions
Mai 9 @ 10 h 30 – 11 h 45

An interesting property of most cryptocurrencies, and Bitcoin in particular, is that the whole history of transactions is accessible to anyone. The objective of the ANR JCJC project BITUNAM (Bitcoin User Network Analysis and Mining) I’m leading is to collect and analyse the transactions on the Bitcoin Blockchain. In this presentation, I’ll introduce what we can and cannot see in that data, introduce the principle of some machine learning techniques we use to better interpret those transactions, and present some examples of usages of transaction flow tracking.

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