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Do M＆As Generate Value for Shareholders？ An Analysis of the Italian Banking Sector

Chinese Business Review 2012年第2期11卷 206-216页

作者： Carmelo Intrisano Fabrizio Rossi University of Cassino Cassino Italy

The aim of this paper is to verify if the M＆As implemented in the past decade in the banking sector have created value for shareholders. For this purpose a sample of 72 deals carded out during the period of 1994-2005 were examined using the ＂event study＂ methodology. These deals were subdivided into three sections： acquisitions, mergers and M＆As. The results obtained seem to suggest a creation of value for the target companies and a destruction of value for the bidders in all three cases. From the analysis of the combined values, on the other hand, a significant destruction of value is deduced in both mergers and in M＆As.

关键词： portfolio choice investment decisions mergers and acquisitions banks event studies

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A great disturbance in the crypto:Understanding cryptocurrency returns under attacks

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Blockchain(Research and Applications) 2021年第3期2卷 68-78页

作者： Simona Ramos Fabio Pianese Thomas Leach Ester Oliveras Augmented Machine Interaction team AI Research LabNokia Bell LabsParis-SaclayNozay 91620France Department of Computer Science Universitat Pompeu FabraBarcelona 08002Spain Department of Economics Universita di PaviaPavia 27100Italy

A non-traditional type of financial asset,cryptocurrencies based on public blockchains are still little understood in their real-world *** events such as cyber-attacks and their media coverage can strongly affect their supply and demand,adoption and usage,efficiency,and infrastructural development,thus influencing their price stability and market *** the great technical complexity of blockchains,we believe that a pure economic analysis of risks associated with cryptocurrencies is simply not sufficient to convey the relationships between attacks and the disruptive effects that these can bring on the operation of *** these grounds,we survey the most common types of attacks for Proof-of-Work(PoW)cryptocurrencies and evaluate their impact on the returns of a number of real-world cryptocurrencies for which market data are *** to data availability,our event study analysis focuses on instances of 51% attacks,hard forks,and wallet *** main goal of our analysis is to understand the relationship between technical events(cyber-attacks and coordinated user/miner behavior)and the economic impacts surrounding *** aim to develop a deeper understanding of these systems that are objects of great research interest in separate disciplines,supporting policymakers in their regulatory decisions concerning crypto-assets and associated cyber-related financial risks.

关键词： Blockchain Cryptocurrencies event studies Cyber attacks

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