L’article original du WaPo du 5/10/15 mentionnait des réserves sur la pauvreté… des données.
For the first time, less than 10 percent of the world is living in extreme poverty, World Bank says - The Washington Post
▻https://www.washingtonpost.com/news/worldviews/wp/2015/10/05/for-the-first-time-less-than-10-percent-of-the-world-is-living-in-ex
Additionally, the quality of the data remains a question for the World Bank — in the past, World Bank researchers have said that only 77 percent of the 155 countries that they study collect reliable data on poverty.
Les mots World Bank researchers renvoyant à un autre article du WaPo (20/07/15)
Data poverty makes it harder to fix real poverty. That’s why the UN should push countries to gather and share data. - The Washington Post
▻https://www.washingtonpost.com/blogs/monkey-cage/wp/2015/07/20/data-poverty-makes-it-harder-to-fix-real-poverty-thats-why-the-un-sh
But critics have long pointed out that the data on MDG progress is patchy and impossible to corroborate. World Bank researchers report that only 77 of the 155 countries they studied collect reliable data on poverty. The UN itself issued a 2014 report stating that data deprivation “can lead to the denial of basic rights, and for the planet, to continued environmental degradation,” and calling for a “data revolution.”
Très intéressant article qui détaille les problèmes de collecte de données (les graphiques sur la périodicité des informations sont difficiles à lire mais assez éclairants…)
Par ailleurs, sur ces questions de pauvreté dite « absolue » dont je ne connais pas grand chose, il me semble qu’un des éléments déterminants est le calcul des PPP, soit #parité_de_pouvoir_d'achat. Il y a là une (très) grosse mécanique. On en perçoit un peu la lourdeur (je n’ai pas suivi les liens) dans ce document de la WB qui détaille les problèmes méthodologiques du changement de seuil de pauvreté (absolue)
The international poverty line has just been raised to $1.90 a day, but global poverty is basically unchanged. How is that even possible ?
The main take-away from these numbers is that changes in the incidence of poverty are relatively small, with poverty being a little lower in the poorest regions (particularly Africa and South Asia), and a little higher in the middle income regions (particularly Latin America, the Caribbean and Europe and Central Asia). Trends over time are rather robust to the change in PPPs.
En gros, c’est en effet super-sensible, mais on [peut constater][a fait en sorte] que ça change pas trop…