Percorrer por autor "Ferreira, Paulo Jorge Silveira"
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- Apple, Alphabet or Microsoft: Which Is the Most Efficient Share?Publication . Ferreira, Paulo Jorge Silveira
- Are European banks informationally weak-form efficient? A dynamic analysisPublication . Almeida, Dora Maria Fortes de; Dionísio, Andreia Teixeira; D’Ascensão, Maria José Marcelino Madeira; Ferreira, Paulo Jorge SilveiraThe efcient market hypothesis (EMH) is a cornerstone of fnancial theory and is crucial to understanding weak-form efciency, particularly during extreme events. Detrended fuctuation analysis (DFA) is a robust approach for assessing weak-form efciency, overcoming some limitations of traditional methods. Given the fundamental role of the banking sector in the economy and its importance during crises, evaluating informational efciency in this sector becomes even more relevant. In the present study, we applied the DFA with sliding windows to assess the weak-form efciency in the stock returns of the European banking sector between February 2016 and February 2023 and the efciency index of Kristoufek and Vosvrda (2013) to rank the weakform efciency levels of the analyzed banks. The results indicate that the COVID-19 pandemic increased bank return persistence. In contrast, the Russia–Ukraine war initially led to antipersistent behavior, but banks returned to persistent patterns over time. The efciency ranking revealed that banks from Belgium, the UK, Spain, and Sweden were less inefcient, whereas those from France and Italy presented higher levels of inefciency. The fndings provide valuable insights for investors and policymakers regarding the development of risk mitigation strategies, risk management, and fnancial stability eforts
- Asian Stock Markets Efficiency: An Econophysics ApproachPublication . Ferreira, Paulo Jorge Silveira
- Assessment of 48 Stock markets using adaptive multifractal approachPublication . Ferreira, Paulo Jorge Silveira; Dionísio, Andreia; Movahed, Seyed Mohammad Sadegh
- Company Management in the Insurance Sector: Valuing Employees and their Work CommitmentPublication . Serrasqueiro, João; Felix, Marta; Veiga, Pedro Mota; Ferreira, Paulo Jorge Silveira; Almeida, DoraThis study focuses mainly on the role of employees in insurance companies in Portugal, analysing the importance of valuing them and their commitment to their work. Considering the above, this research aims to examine which aspects lead to greater commitment on the part of employees and what makes them feel valued within the organisations where they work. A quantitative methodology was used to fulfil this objective, and a questionnaire was applied to various employees in the insurance companies operating in the Portuguese market. The study’s results of the study highlight a positive relationship between leadership, the inclusion of employees, and their commitment to work. They also highlight that participation in decision-making positively influences their satisfaction, appreciation, and loyalty to their company. It can, therefore, be concluded that investing in employees and increasing their satisfaction and commitment is crucial for sustainable growth and organisational success.
- Company Management in the Insurance Sector: Valuing Employees and their Work Commitment.Publication . Serrasqueiro, João; Felix, Marta; Veiga, Pedro Mota; Ferreira, Paulo Jorge Silveira; Almeida, DoraThis study focuses mainly on the role of employees in insurance companies in Portugal, analysing the importance of valuing them and their commitment to their work. Considering the above, this research aims to examine which aspects lead to greater commitment on the part of employees and what makes them feel valued within the organisations where they work. A quantitative methodology was used to fulfil this objective, and a questionnaire was applied to various employees in the insurance companies operating in the Portuguese market. The study’s results of the study highlight a positive relationship between leadership, the inclusion of employees, and their commitment to work. They also highlight that participation in decision-making positively influences their satisfaction, appreciation, and loyalty to their company. It can, therefore, be concluded that investing in employees and increasing their satisfaction and commitment is crucial for sustainable growth and organisational success.
- Desempenho e liderança inovadora: superar a alienação através da aprendizagem organizacional.Publication . Felix, Marta; Nunes, Sara; Loures, Luís; Ferreira, Paulo Jorge Silveira; Almeida, Dora
- Diesel prices in Brazil: A dynamic fractional integration analysisPublication . Ferreira, Paulo Jorge Silveira
- Economia e Política AgráriaPublication . Ferreira, Paulo Jorge Silveira
- Economia explicada ao meu filhoPublication . Ferreira, Paulo Jorge Silveira