Network of calls placed (3A) and received (3B) per capita across the urban system. Figure 3A shows the number of calls placed per capita from origin to destination cities in Côte d’Ivoire. Calling patterns show heavy flows into Abijdan, and a northward trend in calls placed in more southern places. Figure 3B shows calls received per capita. The northern part of the country displays relatively fewer calls into or out of its cities.