1,720,963 research outputs found
On the dynamics of a SIR model for a financial risk contagion
No full textThis work starts from an analogy between fnancial systems and ecosystems so that the SIR
mathematical approach can be revisited in modeling a kind of risk contagion among fnancial players. We are interested on a specifc type of fnancial risk contagion which identifes
frms as the key participants responsible for propagating this contagion. In this respect, the
proposed mechanism facilitating this transmission is the Supply Chain framework. In this
direction, we focus on a new SIR dynamic with time delay which represents the “fnancial
immunity” after recovery. A complete and robust analysis about asymptotic stability is performed for both risk-free and not-free-risk steady states at the long run, by applying Lyapunov functional method. The model is applied to perform some simulations with application
in diferent Italian economic sectors
Complex dynamics of a model with R&D competition
No full textThe paper analyzes a two-stage oligopoly game of semi-collusion in production described by a system with a symmetric structure. We examine the local stability of a Nash equilibrium and the presence of bifurcations. We discover that the model is capable of exhibiting extremely complicated dynamic behaviors
Climate change and asset pricing: a focused review of literature
Full text linkClimate change has a significant impact on the global economy and financial markets, making climate risk and uncertainty central to asset pricing decisions. These risks include potential economic losses due to extreme weather events or gradual changes and can impact business redundancy, infrastructure stability, and approval channels. We review the main theoretical models that incorporate climate risk in asset pricing and the empirical methods to assess the existence of a climate risk premium
Bifurcation analysis of a duopoly game with R&D spillover, price competition and time delays
Full text linkThe aim of this study is to analyse a discrete-time two-stage game with R&D competition by considering a continuous-time set-up with fixed delays. The model is represented in the form of delay differential equations. The stability of all the equilibrium points is studied. It is found that the model exhibits very complex dynamical behaviours, and its Nash equilibrium is destabilised via Hopf bifurcations
Machine learning technique to compute climate risk in finance
Full text linkWe investigate how the application of advanced predictive models could help
investors to assess and manage climate risk in their portfolios, contributing to
the development of more sustainable and resilient investment practices. We
highlight the possible applications of predictive analytics as a key tool in
climate finance. It emerges how emerging technologies (blockchain and
Artificial Intelligence) can improve transparency, efficiency, and climate risk
analysis in sustainable investments. Further lines of research are highlighted,
focusing on how investors and portfolio managers can develop strategies to
manage the risks associated with climate events and the integration of climate
risks into the management of Supply Chain Finance to ensure greater resilience
and sustainability
Going Beyond Counting First Authors in Author Co-citation Analysis
Full text linkThe present study examines one of the fundamental aspects of author co-citation analysis (ACA) - the way co-citation
counts are defined. Co-citation counting provides the data on which all subsequent statistical analyses and mappings
are based, and we compare ACA results based on two different types of co-citation counting - the traditional type that
only counts the first one among a cited work's authors on the one hand and a non-traditional type that takes into
account the first 5 authors of a cited work on the other hand. Results indicate that the picture produced through this non-traditional author co-citation counting contains more coherent author groups and is therefore considerably clearer. However, this picture represents fewer specialties in the research field being studied than that produced through the traditional first-author co-citation counting when the same number of top-ranked authors is selected and analyzed. Reasons for these effects are discussed
Variations on the Author
Full text link“Variations on the Author” discusses two of Eduardo Coutinho’s recent films (Um Dia na Vida, from 2010, and Últimas Conversas, posthumously released in 2015) and their contribution to the general question of documentary authorship. The director’s filmography is characterized by a consistent yet self-effacing form of authorial self-inscription: Coutinho often features as an interviewer that rather than express opinions propels discourses; an interviewer that is good at listening. This mode of self-inscription characterizes him as an author who is not expressive but who is nonetheless markedly present on the screen. In Um Dia na Vida, however, Coutinho is completely absent form the image, while Últimas Conversas, on the contrary, includes a confessional prologue that moves the director from the margins to the center of his films. This article examines the ways in which these works stand out in the filmography of a director who offers new insights into the notion of cinematic authorship
Appropriate Similarity Measures for Author Cocitation Analysis
Full text linkWe provide a number of new insights into the methodological discussion about author cocitation analysis. We first argue that the use of the Pearson correlation for measuring the similarity between authors’ cocitation profiles is not very satisfactory. We then discuss what kind of similarity measures may be used as an alternative to the Pearson correlation. We consider three similarity measures in particular. One is the well-known cosine. The other two similarity measures have not been used before in the bibliometric literature. Finally, we show by means of an example that our findings have a high practical relevance.information science;Pearson correlation;cosine;similarity measure;author cocitation analysis
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