https://hdl.handle.net/10419/54353 2026-09-20T02:03:38Z 2026-09-20T02:03:38Z Carvajal-Camperos, Marisol Almodóvar, Paloma https://hdl.handle.net/10419/325596 2025-09-18T01:29:43Z 2025-01-01T00:00:00Z

Title: Tracking the literature on strategic alliances in the biotechnology industry: Insights from a bibliometric approach over the last 30 years Authors: Carvajal-Camperos, Marisol; Almodóvar, Paloma Abstract: Purpose - The purpose of this study is to identify papers that have produced the most significant impact on research on strategic alliances in the biotechnology industry. The authors attempt to illustrate the thematic evolution of its intellectual structure through 616 papers published between 1992 and 2021. Design/methodology/approach The present research methodology relies on three distinct techniques, implemented using SciMat software: (1) bibliometric techniques, (2) scientific map analysis and (3) content analysis of research documents from the Web of Science (WoS). In this manner, the authors analyse the intellectual structure of the field of strategic alliances in the biotechnology industry, tracking its evolution over a period of three decades. Findings The study emphasises the relevance of "innovation" as a key theme and identifies several potential areas for future research, which could serve as a foundation for further investigations. Originality/value This study represents a novel contribution to the literature as it is the first to use the SciMat tool to analyse strategic alliances in the biotechnology industry. This research reveals that while strategic alliances have been assessed extensively across various industries, some topics, such as the types and formation of alliances, have not been specifically studied in the biotechnology industry. These areas as well as the barriers and variables influencing the formation of alliances offer promising avenues for future research in this field.

2025-01-01T00:00:00Z Palazón, Mariola Alarcón-del-Amo, María-del-Carmen Martínez, Borja López, Manuela https://hdl.handle.net/10419/325590 2025-09-18T01:29:50Z 2025-01-01T00:00:00Z

Title: Consumers' healthy lifestyle as a determinant of the influence of microcelebrities and microinfluencers Authors: Palazón, Mariola; Alarcón-del-Amo, María-del-Carmen; Martínez, Borja; López, Manuela Abstract: Purpose - This study analyzes what type of influencer - microcelebrity or microinfluencer - is best suited to promoting healthy food brands and how that influence depends on consumers' healthy lifestyles. Design/methodology/approach An empirical study with a real healthy food brand was developed in which three real influencers from Instagram collaborated and posted a story showing the company's products. A total of 148 individuals participated in the study. The proposed model was tested using the PROCESS macro. Findings Drawing on the celebrity endorsement literature and the meaning transfer model, this study proposes that microcelebrities' and microinfluencers' influence on consumers' perception and behavior in terms of post relevance, brand attitude and purchase intention toward healthy food brands depends on the consumers' healthy lifestyle. Thus, microcelebrities have more influence on individuals with unhealthy lifestyles, while microinfluencers have more influence on individuals that pursue a healthy lifestyle. Originality/value It is one of the first studies to examine the different roles of microinfluencers versus microcelebrities in promoting consumers' attitudes and behaviors toward healthy food brands. In addition, this is one of the few studies to show a higher effect of microcelebrities over microinfluencers.

2025-01-01T00:00:00Z Zavertjaeva, Marina Aleksandrovna Ershova, Tatiana https://hdl.handle.net/10419/325594 2025-09-18T01:29:55Z 2025-01-01T00:00:00Z

Title: Rule with an iron hand: Powerful CEOs, influential shareholders and corporate performance in Russia Authors: Zavertjaeva, Marina Aleksandrovna; Ershova, Tatiana Abstract: Purpose - This study examines whether CEO power influences the book-based and market-based performance of Russian companies when it is restricted by the presence of essential shareholders, namely, state and influential businessmen. Design/methodology/approach Managerial power is divided into structural, ownership, expert and prestige. The proposed power metrics include not only CEOs but also the board of directors' characteristics that may restrict or enhance CEO power. The empirical analysis is based on the sample of 90 large traded Russian firms, which shares are included in the Moscow Stock Exchange Broad Market Index (MICEX BMI), observed from 2012 to 2019. Findings Panel data analysis suggests that higher board ownership and tenure may restrict CEO power, which in turn would be beneficial for corporate performance. the authors also see that in companies owned by influential businessmen, CEO power influence on M/B value is more negative, while state ownership does not moderate it. CEO power metrics, based on political experience and tenure, affect corporate performance differently in companies affiliated with extractive industries. Originality/value First, the authors consider two channels through which a company in emerging markets may get additional resources: CEOs and influential owners. Second, the authors develop power metrics based on Finkelstein's managerial power classification (1992) and the idea of relative power proposed by Bebchuk et al. (2011). It allows identifying whether the board of directors' may constrain or enhance CEO power to raise corporate performance. Third, the authors analyze developing Russian markets that represent a good ground for testing the question, whereas empirical research on Russia is relatively scarce (Grosman and Leiponen, 2018). Fourth, the authors pay particular attention to the CEO power in the extractive industry, strategically important for the Russian economy.

2025-01-01T00:00:00Z Soltani, Hayet Taleb, Jamila Abbes, Mouna Boujelbène https://hdl.handle.net/10419/325584 2025-09-18T01:29:37Z 2025-01-01T00:00:00Z

Title: The directional spillover effects and time-frequency nexus between stock markets, cryptocurrency, and investor sentiment during the COVID-19 pandemic Authors: Soltani, Hayet; Taleb, Jamila; Abbes, Mouna Boujelbène Abstract: Purpose - This paper aims to analyze the connectedness between Gulf Cooperation Council (GCC) stock market index and cryptocurrencies. It investigates the relevant impact of RavenPack COVID sentiment on the dynamic of stock market indices and conventional cryptocurrencies as well as their Islamic counterparts during the onset of the COVID-19 crisis. Design/methodology/approach The authors rely on the methodology of Diebold and Yilmaz (2012, 2014) to construct network-associated measures. Then, the wavelet coherence model was applied to explore co-movements between GCC stock markets, cryptocurrencies and RavenPack COVID sentiment. As a robustness check, the authors used the time-frequency connectedness developed by Barunik and Krehlik (2018) to verify the direction and scale connectedness among these markets. Findings The results illustrate the effect of COVID-19 on all cryptocurrency markets. The time variations of stock returns display stylized fact tails and volatility clustering for all return series. This stressful period increased investor pessimism and fears and generated negative emotions. The findings also highlight a high spillover of shocks between RavenPack COVID sentiment, Islamic and conventional stock return indices and cryptocurrencies. In addition, we find that RavenPack COVID sentiment is the main net transmitter of shocks for all conventional market indices and that most Islamic indices and cryptocurrencies are net receivers. Practical implications This study provides two main types of implications: On the one hand, it helps fund managers adjust the risk exposure of their portfolio by including stocks that significantly respond to COVID-19 sentiment and those that do not. On the other hand, the volatility mechanism and investor sentiment can be interesting for investors as it allows them to consider the dynamics of each market and thus optimize the asset portfolio allocation. Originality/value This finding suggests that the RavenPack COVID sentiment is a net transmitter of shocks. It is considered a prominent channel of shock spillovers during the health crisis, which confirms the behavioral contagion. This study also identifies the contribution of particular interest to fund managers and investors. In fact, it helps them design their portfolio strategy accordingly.

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