Gregory Clarks & Neil Cummins (2025)
Abstract
What happens across generations to random wealth shocks? Do they endure and even magnify,
or do they dissipate? By implication, how much of modern wealth is attributable to events
before 1900? This paper uses random shocks to family size in England before 1880, that created
wealth shocks for the children, to measure the persistence of random wealth shocks. Fertility
for married couples in England before 1880 was not controlled, but was a biological lottery.
And for richer families, family size strongly influenced child wealth. This paper finds that such
biology-induced wealth shocks had no impact on descendent wealth by three generations later.
Since wealth itself persisted strongly across more than five generations this implies that, in the
long run, wealth mainly derives from sources other than wealth inheritance itself. The observed
link between nineteenth century wealth and modern wealth does not lie in wealth transmission
itself. Instead wealth persisted because of the inheritance within families of behaviors and
abilities associated with wealth accumulation and wealth retention.
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