/library/oar/handle/123456789/72311 2025-12-25T13:25:26Z /library/oar/handle/123456789/72581 Title: From manufacturing to advanced services : the (uneven) rise and decline of Mediterranean city-regions Authors: Salvati, Luca Abstract: Uneven changes in the global urban hierarchy have given way to new forms of relationships between urban and rural areas based on complementarities, cooperative and specialized exchange of services and goods, abandoning the additive processes of growth guided by industrialization and urbanization. Representing a distant notion from traditional concepts in regional studies such as 'compact cities' or 'suburbs', 'gravitation' or 'hierarchy', the 'city-region' paradigm has stimulated different visions to be recomposed within the 'sustainability' framework. With global changes, the 'mega-city region' model has starting to take the lead in the development of contemporary urban agglomeration. In this study, considerations over the emergence of this urban model in the Mediterranean region will be presented to investigate the relationship between dispersed urbanization and consolidating southern European city-regions. While Mediterranean cities have been considered for long time as ‘ordinary’ cities, rather distant from the 'globalized' northern urban models, most of these cities are characterized by distinctive socioeconomic traits possibly open to competition and globalization. The present contribution describes the emergence of a Mediterranean urban area, Athens, as a new 'city-region' in the context of urbanization processes in Greece and in the Mediterranean basin as a whole. One of the clearest indications of urban competitiveness amongst emerging and established large city-regions is the fight for hosting mega-events. The final objective of the study is to understand how the efforts for increasing urban competitiveness are impacting new forms of city-regions, mainly based on low-density settlements reflecting discontinuous urbanization. 2018-01-01T00:00:00Z /library/oar/handle/123456789/72580 Title: Option pricing in stochastic volatility models driven by fractional jump-diffusion processes Authors: Jenabi, Omid; Ghale No, Nazar Dahmardeh Abstract: In this paper, we propose a fractional stochastic volatility jump-diffusion model which extends the Bates (1996) model, where we model the volatility as a fractional process. Extensive empirical studies show that the distributions of the logarithmic returns of financial asset usually exhibit properties of self-similarity and long-range dependence and since the fractional Brownian motion has these two important properties, it has the ability to capture the behavior of underlying asset price. Further incorporating jumps into the stochastic volatility framework gives further freedom to financial mathematicians to fit both the short and long end of the implied volatility surface. We propose a stochastic model which contains both fractional and jump process. Then we price options using Monte Carlo simulations along with a variance reduction technique (antithetic variates). We use market data from the S&P 500 index and we compare our results with the Heston and Bates model using error measures. The results show our model greatly outperforms previous models in terms of estimation accuracy. 2018-01-01T00:00:00Z /library/oar/handle/123456789/72579 Title: Towards a society with a more fair economy or an economy with a more social face : the contribution of scientific social knowledge to the alternative models of socioeconomic development - a book review Authors: Ferreira, Manuel Alberto M. Abstract: The objective of this work is the book “Towards a Society with a More Fair Economy or an Economy with a More Social Face: The Contribution of Scientific Social Knowledge to the Alternative Models of Socioeconomic Development”, 978-1-63482-948-9, from Nova Science Publishers Series Economic Issues, Problems and Perspectives, whose Editors are José António Filipe, Nikos Nagopoulos, Kostas Rontos, and Ioannis Vavouras. 2018-01-01T00:00:00Z /library/oar/handle/123456789/72578 Title: Pensions : global issues, perspectives and challenges - a book review Authors: Filipe, José António Abstract: The objective of this work is the book “Pensions: Global Issues, Perspectives and Challenges”, 2017, 978-1-53612-467-5, from Nova Science Publishers Series Business Issues, Competition and Entrepreneurship. The editor is Alexandra Webb. 2018-01-01T00:00:00Z