The Condition of the Working Class in Britain, 1300-

Data built by Greg Clark on real wages coupled with population estimates.

I read this as showing slow improvements in technology from 1300 to 1600 offset by the coming of the "little ice age." Thus from 1300-1600 when population went up real wages went down, and vice versa. After 1600, with the climate no longer deteriorating, improvements in technology get you a more favorable population-real wages tradeoff. After 1700 the speed at which the tradeoff moves left accelerates ("agricultural revolution") and after 1800 it accelerate again ("industrial revolution").