What’s the data-driven journalism (#ddj) crowd tweeting about? Here are the week’s top ten data journalism links for Jan. 23-30. Find out why the world has more men than women (Quartz), where the most expensive place in Africa is to run a presidential campaign (Jeune Afrique), and what “precision medicine” is and whether it works (NY Times). This list is determined by NodeXL, a social media network mapping program. The full map is available at the bottom of this roundup.