Presentations should be illustrative, not exhaustive, and an image can make them more illustrative. This helps us in many ways. For instance, it helps us emphasize a point without any ambiguity. A new ...

In 1834, a 22-year-old Yoruba man who would come to be known as Manuel Vidau was captured as a prisoner of war and sold to slave traders in Lagos, today the largest city in Nigeria. A Spanish ship ...

The Daily News Sentiment Index is a high frequency measure of economic sentiment based on lexical analysis of economics-related news articles. The index is described in Buckman, Shapiro, Sudhof, and ...