Not my words, but that’s what UNU-Wider calls it. As I written before I think that it is true that some countries have better data that are available through household surveys. BUT: not all of these are comparable, and availability is NOT random, hence the sample is biased. In conclusion – it is hard to draw inferences on direction and magnitude of change in poverty.
If you don’t like the title ‘The great African data debate” you can always go for ‘The African Statistics Smackdown“. Again, not my title.