What were income trends before the Industrial Revolution? Clark (2007b) argued both theoretically and empirically that pre-industrial income fluctuated, but was not trending upwards, a position Persson (2008) labeled “the Malthus Delusion.” Clark (2010a), in particular, estimated that...

This paper explains how surname distributions can be used as a way to measure rates of social mobility in contemporary and historical societies. This allows for estimates of social mobility rates for any population for which we know just two facts: the distribution of surnames overall, and the...