"New longitudinal data on individuals linked across nineteenth century U.S. censuses document the geographic and occupational mobility of more than 75,000 Americans from the 1850s to the 1920s. Together with longitudinal data for more recent years, these data make possible for the first time...

It has often been assumed that the subjects of the Ottoman sultans were unable to travel beyond their localities - since peasants needed the permission of their local administrators before they could leave their villages. According to this view, only soldiers and members of the governing elite...