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Jim Oeppen « Top of the Campops: 60 things you didn't know about family, marriage, work, and death since the middle ages

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Jim Oeppen

Three score and ten?

Thursday, August 15th, 2024

Romola Davenport & Jim Oeppen

Campop’s studies of mortality suggest that, in England, average life expectancy at birth varied between 35 and 40 years in the centuries between 1600 and 1800It is a common misconception that, when life expectancy was so low, there must have been very few old peopleIn fact, the most common age for adult deaths was around 70 years, in line with the Biblical three score years and ten. So what does life expectancy actually measure?

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What a big family you have, Grandma!

Thursday, August 1st, 2024

Alice Reid & Jim Oeppen

Looking backwards in time gives a mistaken impression that family sizes in the past were larger than they actually were. This blog explains why this happens, and explores the differences between the picture of the past painted by genealogies and the past as it actually was. 

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What was the size of the English population before the first census in 1801 – and how do we know?

Thursday, July 11th, 2024

Jim Oeppen

Campop’s estimated series of population totals for England from 1541 to 1871 are the longest and most detailed available for any country. The associated age-structures have been used to provide summary measures of fertility and mortality, such as replacement rates and life expectancy. The opportunity they present for extending per capita analysis into the past means that they have become a standard reference for historical demography and economic history, and have been cited in over 1,500 academic publications. 

Why do we need to calculate population size?  

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