The past two decades have seen extensive analyses of the taxonomic severity of major biodiversity crises in geologic time. In contrast, we propose here an alternative analysis of the ecological severity of biodiversity crises. It is clear that the ecological impacts of the five Phanerozoic biodiversity crises were not all the same. Ranking the five Phanerozoic biodiversity crises by ecological ...

This study examines financial contagion effects in African stock markets during major crises over the period 2005 to 2020. We investigate individual and from a regional perspective using dynamic conditional correlations global crisis, European debt Brexit, COVID-19. The empirical evidence confirms some markets. However, significant of is found only crisis perspective. Our findings suggest that ...

We investigate the impact of financial crises on two fundamental features of stock returns, namely, the risk-return tradeoff and the leverage effect. We apply the fractionally integrated exponential GARCH-in-mean (FIEGARCH-M) model for daily stock return data, which includes both features and allows the co-existence of long memory in volatility and short memory in returns. We extend this model ...

literature plays various roles, the major function being expressing reality through the forms of the novel and the short story. naguib mahfuz, one of the outstanding arab novelists, has special talents in this respect. he expresses social problems critically. the sexual crisis is one of the plights which is both discussed and challenged in his novels and short stories. he investigated sexual cr...

The prediction of business crises is an important academic topic of which many have used artificial intelligence methods to build an early warning system for this purpose. The objective of this study is to enhance the accuracy in predicting business crises by proposing an innovative model that combines financial variables with a system that integrates Case Based Reasoning (CBR) model with a Sup...

The simultaneous determination of financial default and political crises is studied in an open economy model. Political crises accompany default in equilibrium because of an information transmission conflict between the government and the public. Multiple equilibria are possible: if foreign lenders are pessimistic about the country’s stability, they demand a high interest on the debt, exacerbat...

During recent years we have seen several large-scale crises. The 9/11 terror attacks, tsunamis, storms, floods and bombings have all been unpredictable and caused a great deal of damage. One common factor in these crises has been the need for information and one important source of information is usually web sites. In this work three new sets of web server access logs are presented and analyzed...

The surge in capital flows towards emerging market countries is one of the major developments in the world economy in the 1990s. In particular, short-term flows, in the form of portfolio investments or bank loans, have grown at an extremely rapid pace. At the same time, emerging markets have experienced an increasing number of financial crises, with dire consequences. It is increasingly argued ...

Financial crises are linked to large output declines, but the potential links between different types of crises remains unclear. To enhance understanding we study the interdependencies between domestic banking crises, on one hand, and external financial crises, including currency and sudden stop crises, on the other in a quarterly global panel. We further ask how the different crises relate to ...