Guidolin, Massimo; La Ferrara, Eliana - 2005 - Rev
using microeconomic data for Angola. We focus on diamond mining firms and conduct an event study on the sudden end of the … news" rather than "good news" for companies holding concessions in Angola, as their abnormal returns declined by 4 … percentage points. The event had no effect on a control portfolio of otherwise similar diamond mining companies. This finding is …
