The Challenges of Comparing Countries

The number of COVID cases in sub-Saharan Africa, for example. No one has a clue; it's just got to be estimated. There are lots of countries where deaths are not all registered or at least there isn't a centralized record where they are. The sustainable development goals require countries to report on their progress every so often. But this is proving already to be a real challenge for some countries, particularly those that are in conflict.