Needless to say, the title does not describe the research correctly. Here is the actual research: https://www.nber.org/papers/w33311 https://www.nber.org/pape

Needless to say, the title does not describe the research correctly. Here is the actual research: https://www.nber.org/papers/w33311 https://www.nber.org/papers/w33311 >This paper addresses why some countries in Europe and Asia with moderate fertility levels in 1980s, have become the “lowest-low” nations today (total fertility rates of less than 1.3), whereas those that decreased earlier have not. Also addressed is why the crossover point for the two groups of nations was around the 1980s and 1990s.