## Analysing Wargentin''s (1717-1782) Survival Function: The Data of Tabellverket and a Probabilistic Theory

**Elisabeth Morand**, *Ined*

**Nathalie le Bouteillec**, *Ined*

As mentioned above Pehr Wargentin focused in particular on the survival function and for the first time on inequality between men and women. Contrary to the current utility of the age pyramid, which aims to establish average durations of survival, the survival function was a way for the scholars of the time to deduce the total population. To approximate the universal multiplier or to find a more exact method to estimate the size of the population they constructed mortality with the parameters they knew as the number of births or the number of deaths. The calculations made by Wargentin and previously by Hayley are based on a stable and closed population. In this situation, the calculations allow to represent a survival curve and also a pyramid of age if one inverses x-axis and the y-axis.

The aim of this communication is to present the pyramid according to Wargentin and others views of the time as well as to put it into perspectives with actual graphical representations.

Presented in Session 1233: History