In this paper we propose a novel approach in analysing the impact of changes in sovereign credit ratings on stock markets. We study the evolution of a segmented form of the stock market index for several crisis-hit countries, including both European and Asian markets. Such evolution is modelled...

The COVID-19 pandemic disrupted the learning process of more than 1.5 billion students and youth around the world. The abrupt and unplanned shift to online schooling had a negative impact on student learning and achievement, with the greatest challenges experienced by the most vulnerable...