The objective of this paper is to identify the presence, direction and time at which the pure contagion effect occurred between financial markets. In so doing, the aim is to prove the existence of both spatial and temporal asymmetries of pure contagion effects. Firstly, a new empirical framework is proposed in order to define a spatial contagion index using the conditional cumulative distribution function as a parameter to estimate a conditional copula. This methodology enables us to estimate a dynamic conditional copula, providing information about how the market sent pure contagion effects and when. Secondly, in addition to detecting the direction of contagion, the real-time contagion effect is determined, enabling us to calculate the delay of contagion effects (spillover) between financial markets. The present empirical results show the existence of both spatial and temporal asymmetry for bilateral contagion effects for 16 mature and emerging stock markets during the 2001-2018 period. This proves the importance of taking temporal asymmetry into account when we want to detect the contagion effect of every crisis and to estimate the period of pure contagion relating to investors' behaviors. Finally, these findings highlight the fact that contagion effects were more intensive during the subprime crisis than they were during the European debt crisis.
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http://dx.doi.org/10.1007/s10479-021-04223-9 | DOI Listing |
Biom J
February 2025
Department of Biomedical Data Science, Geisel School of Medicine at Dartmouth, Lebanon, New Hampshire, USA.
Despite the extensive use of network autocorrelation models in social network analysis, network autocorrelation models for binary dependent variables have received surprisingly scant attention. In this paper, we develop four network autocorrelation models for a binary random variable defined by whether the peer effect (also termed social influence or contagion) acts on latent continuous outcomes leading to an indirect effect under a normal or a logistic distribution or on the probability of the observed outcome itself under a probit or a logit link function defining a direct effect to account for interdependence between outcomes. For all models, we use a Bayesian approach for model estimation under a uniform prior on a transformed peer effect parameter ( ) designed to enhance model computation and compare results to those under the uniform prior for .
View Article and Find Full Text PDFJ Eat Disord
December 2024
Department of Social and Developmental Psychology, University of Rome Sapienza, via dei Marsi 78, Rome, 00185, Italy.
Background: The long-lasting consequences of the COVID-19 pandemic on the psychological well-being of young people have become an emerging research topic, which still raises several questions for post-pandemic interventions at the individual and community levels. This research investigated the relationship between COVID-19 pandemic life events and the occurrence of binge eating behaviors in emerging adults, hypothesizing indirect effects of the emotional impact of pandemic events and social anxiety.
Methods: Data collection was conducted in November and December 2021 in Italy, involving 286 university students aged 18 to 30 years (M = 20.
Infect Ecol Epidemiol
December 2024
Institute for Globally Distributed Open Research and Education (IGDORE), Karachi, Pakistan.
This article investigates the escalating occurrence of zoonotic diseases in Africa, attributing their spread to climate change and human activities. Africa's unique combination of biodiversity, reliance on animal husbandry, and swift urbanization heightens its susceptibility. Climate change disrupts ecosystems and animal habitats, intensifying human-wildlife interactions.
View Article and Find Full Text PDFBackground: Ceftolozane-tazobactam and ceftazidime-avibactam are preferred treatment options for multidrug-resistant Pseudomonas aeruginosa infections; however, real-world comparative effectiveness studies are scarce. Pharmacokinetic and pharmacodynamic differences between the agents might affect clinical response rates. We aimed to compare the effectiveness of ceftolozane-tazobactam and ceftazidime-avibactam for treatment of invasive multidrug-resistant P aeruginosa infections.
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