105 citations · 477 across the 60 of their papers we have counts for
5 papers · 2 filters
The influence of Lent on marriages and conceptions explored through a new methodology
Claudiu Herteliu, Peter Richmond, Bertrand M. Roehner
Herteliu et al. (2015) have elsewhere analyzed the impact of religious festivals on births in Romania. Here we broaden the analysis (i) by studying the effect of Lent on marriages…
How can population pyramids be used to explore the past?
Bertrand M. Roehner
In the same way as tree rings give us useful information about the climate many decades ago (or even centuries ago in the case of big trees), population pyramids allow us to know b…
Effect of population density on epidemics
Ruiqi Li, Peter Richmond, Bertrand M. Roehner
Investigations of a possible connection between population density and the propagation and magnitude of epidemics have so far led to mixed and unconvincing results. There are three…
Coupling between death spikes and birth troughs. Part 2: Comparative analysis of salient features
Peter Richmond, Bertrand M. Roehner
In part 1 we identified a new coupling between death spikes and birth dips that occurs following catastrophic events such as influenza pandemics and earthquakes. Here we seek to ch…
Coupling between death spikes and birth troughs. Part 1: Evidence
Peter Richmond, Bertrand M. Roehner
In the wake of the influenza pandemic of 1889-1890 Jacques Bertillon, a pioneer of medical statistics, noticed that after the massive death spike there was a dip in birth numbers a…