E-Hailing Apps (EHA) have become very popular in Brazil due to the swift proliferation of smartphones in the country. Thus, the scope of this article is to ascertain the antecedents of use of EHA in Brazil from the passengers’ ...

News spread can be seen as a contagious process in internet media outlets. This process can be transformed into a temporal network which represents the influence between published articles and between media outlets. In ...

The issue of state estimation is considered for an SIR-SI model describing a vector-borne disease such as dengue fever, with seasonal variations and uncertainties in the transmission rates. Assuming continuous measurement ...

Using market-wide data from the Brazilian stock lending market, we nd strong evidence of short-selling skill among institutions and individuals. Skilled short-sellers present out-of-sample performance persistence, both ...