The difference in age, as well as gender, contributes various perspectives and capabilities.

FORBES: Why Smart Leaders Don't Clone Themselves

He suggested the gender differences may have evolved as part of a more general difference in stress responses between men and women.

BBC: NEWS | Health | Genders 'sense pain differently'

But, like Liberia's new president, Ellen Johnson Sirleaf, the continent's first female elected as head of state, women are determined to make a gender difference in the way they do business.

NPR: African Women and the Struggle Against Poverty