Publications

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Climate uncertainty effects on bitcoin ecological footprint through cryptocurrency environmental attention

Khaled GUESMI, Wissal Zribi, Talel Boufateh

In this study, we investigate the dynamic relationship between physical climate risks and Bitcoin's energy consumption and carbon footprint, focusing on cryptocurrency environmental performance.

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Cyber-attacks and banking intermediation

Using data from 2144 U.S. banks over the period from 2011 to 2019, this article aims to analyze banks' responses to cyber-attacks. Our results highlight that cyber-attacks affect banking intermediation through a reduction in deposit collection, and credit supply.

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La Bête du Gévaudan : un mystère français éclairé par les statistiques

Entre 1764 et 1767, le Gévaudan focalise l'attention du Royaume de France. Pendant trois ans, une bête sévit dans cette région reculée, laissant derrière elle de nombreuses victimes.

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Loyalty, Voice, Exit. A new perspective on Hirschman’s legacy

Patrice CAILLEBA, J. EDELBLOUDE

With regard to Hirschman’s “Exit, Voice & Loyalty” triptych, this paper shows how it has turned ethical conduct into a protocol of actions by replacing individual values with pragmatic behavior for whistleblowers.

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Optimizing portfolios for the BREXIT: An equity-commodity analysis of US, European and BRICS markets

Khaled GUESMI, Stephane GOUTTE, Ahmed AYADI, Marjène GANA

The objective of this study is to create optimal two-asset portfolios consisting of stocks from Western Europe, the United States, and the BRICS (Brazil, China, India, Russia, and South Africa), as well as sixteen commodity types during the BREXIT period.

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Portfolio optimization through hybrid deep learning and genetic algorithms vine Copula-GARCH-EVT-CVaR model

Khaled GUESMI, Rihab Bedoui, Ramzi BENKRAIEM, Islem KEDIDI

This study investigates the potential benefits of using the Conditional Value at Risk (CVaR) portfolio optimization
approach with a GARCH model, Extreme Value Theory (EVT), and Vine Copula to obtain the optimal allocation

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Should brands foster their Instagram account followers’ fear of missing out by posting ephemeral content?

Daniel MAAR, H. KEFI, M. A. ORHAN
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Subsample analysis of stock market – cryptocurrency returns tail dependence: A copula approach for the tails

Nabila BOUKEF JLASSI, Ahmed JERIBI, Amine LAHIANI, Salma MEFTEH-WALI

This paper describes the extremal and tail dependence between G7 stock market returns (USA, Canada, UK, Japan, Germany, France, Italy) and cryptocurrency returns (Bitcoin, Ethereum, Dash, Monero, Ripple) on the basis of the bivariate extremal dependence model (Padoan and Stupfler, 2022) and the b

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