This paper studies the dynamics of fertility in 180 countries in the period 1950-2015 and investigates the determinants of the onset of fertility transitions. We find evidence of convergence in three groups of countries, and distinguish the transitioning countries from those not transitioning....

"We show that much of the recent reported decrease in interstate migration is a statistical artifact. Before 2006, the Census Bureau's imputation procedure for dealing with missing data inflated the estimated interstate migration rate. An undocumented change in the procedure corrected the...