Duration Dependence And Mean Reversion : An Attempt Of Identification In Tunisian Stock Market

This study investigates the duration dependence of Tunisian stock market over the period from January 07, 1998 to March 29, 2013; using two-state Duration Markov-switching model. Through this model, duration dependence is emphasized in the conditional mean return, volatility, risk-return trade-off and transition probabilities. We demonstrate that TUNINDEX index weekly returns can be sorted into bull and bear market states. Our results are consistent with mean reversion process; i.e. mean reversion is the tendency of asset prices to return to a trend path. Finally, we conclude that Tunisian stock market fluctuations can be characterized by the presence of the countercyclical return volatility due to the asymmetric movements of the risk premia

Retroperitoneal Abscess: A Rare Localization of Tubercular Infection

Incidence of tuberculosis infection has considerably increased during the past 20 years due to the HIV pandemic and continues to be one of the most prevalent and deadly infections worldwide. Extrapulmonary tuberculosis lacks specific clinical manifestation and can mimic many diseases. It can invade neighbouring tissue and form a big cyst with manifesting clinical symptoms. We describe a rare case of 31-year-old immunocompetent man affected by a retroperitoneal abscess secondary to tubercular infection. Exploratory laparotomy and histopathological examinations of tissue were required for achieving diagnosis of tuberculosis. No pulmonary or spinal involvement was identified. The patient was successfully treated with standard four-drug antitubercular therapy

[Report from] Joint EIFAAC/ICES/GFCM Workinggroup on eels (WGEEL)

Source at https://www.ices.dk/Science/publications/Pages/Scientific-reports.aspx