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Risque de fraude interne, comment dissuader efficacement les salariés ? , Gérer & Comprendre, Septembre 2022, n°149, 47-60.

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Directional predictability and time-frequency spillovers among clean energy sectors and oil price uncertainty

Christian UROM, Khaled GUESMI, Hela Mzoughi, Gideon Ndubuisi

This paper analyzes the dependence among clean energy sectors and oil price uncertainty using the NASDAQ OMX Green Economy Index for the Building, Economy, Edge, Financial, Technology and Transport sectors in the United States.

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Dynamic dependence and predictability between volume and return of Non-Fungible Tokens (NFTs): The roles of market factors and geopolitical risks

Christian UROM, Khaled GUESMI, Gideon Ndubuisi

We examine the dependence between volume and returns for the NFT market and three sub-markets (Cryptokitties, Cryptopunks, and Decentraland) using both quantile cross-spectral coherency and quantile regression techniques.

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Global commodity and equity markets spillovers to Africa during the COVID-19 pandemic

This paper examines the connectedness among 12 African equity markets and the global commodity, developed equity markets, paying particular attention to their evolution during the COVID-19 pandemic's peak period.

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Loyalty, Voice, Exit : A New Perspective on Hirschman’s legacy for whistle-blowers

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Technologies de contrôle : un enjeu organisationnel de lutte contre la fraude interne ?

Internal fraud is a risk identified by organizations that have set up internal control services to protect themselves against it.

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The Impact of COVID-19 Pandemic on Islamic and Conventional Financial Markets: an international empirical evidence

Khaled GUESMI, Christian UROM, H. MZOUGHI, Fateh BELAID

The current global COVID-19 pandemic is adversely affecting financial markets, including commodities, conventional stocks, and Islamic stocks. This paper empirically investigates the extent to which COVID-19 effects may drive interdependence in markets.