Browsing by Author "Petropoulos, Fotios"
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Item Open Access Decoding digital philanthropy analyzing donors choices in cryptocurrency donations(SSRN: Social Science Research Network, 2024-04-02) Keshvari Fard, Milad; Liu, Jingshu; Petropoulos, FotiosSince Bitcoin’s inception in 2009, cryptocurrencies have found applications in various domains. However, despite the unique potential of cryptocurrencies for the nonprofit sector, especially in fundraising, there is a scarcity of research on the behavior of crypto donors. In this research, we investigate key attributes of cryptocurrencies that correlate with the amount of donations made in that specific digital currency, and explore characteristics of digital wallets that predict the donation behavior of wallet holders. For our regression analysis, we use donation data from the Aid for Ukraine campaign, one of the largest cryptocurrency fundraising initiatives launched in response to the Russian invasion of Ukraine. Our findings indicate that cryptocurrencies with a larger market cap and higher age tend to be favored by donors, while those associated with higher transaction fees are preferred less frequently. Donors also exhibit a propensity to contribute more in cryptocurrencies of higher price volatility. Moreover, everything else equal, stablecoins are used more often for donations. On the other hand, our results highlight that frequent cryptocurrency users tend to make larger crypto donations and are more inclined to continue supporting the campaign through future contributions. Furthermore, donors with identifiable names for their wallets tend to donate larger amounts, although this feature does not predict their inclination for future contributions.Item Open Access Operational research: methods and applications(Taylor & Francis, 2023-12-27) Petropoulos, Fotios; Laporte, Gilbert; Aktas, EmelThroughout its history, Operational Research has evolved to include methods, models and algorithms that have been applied to a wide range of contexts. This encyclopedic article consists of two main sections: methods and applications. The first summarises the up-to-date knowledge and provides an overview of the state-of-the-art methods and key developments in the various subdomains of the field. The second offers a wide-ranging list of areas where Operational Research has been applied. The article is meant to be read in a nonlinear fashion and used as a point of reference by a diverse pool of readers: academics, researchers, students, and practitioners. The entries within the methods and applications sections are presented in alphabetical order. The authors dedicate this paper to the 2023 Turkey/Syria earthquake victims. We sincerely hope that advances in OR will play a role towards minimising the pain and suffering caused by this and future catastrophes.