Fernandez-Villaverde says he goes to each country's national statistical agency's website, and uses their numbers for births and deaths and population, and computes fertility and replacement rate, and the trajectory of population for each country from that.
He says he has no idea where the UN gets its numbers, despite asking several times. He is a professor of economics and demography, so he's not going to just make stuff up.
He says he has no idea where the UN gets its numbers, despite asking several times. He is a professor of economics and demography, so he's not going to just make stuff up.