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There various datasets around showing correlations between numbers of storks and numbers of births, although differences in changes over time. Usually they are described as having been observed in Sweden. I seem to remember one set in a Genstat manual. I have been asked about an unreferenced set I used in an article in abput 1980, although I think it was later. I have been using a version recently to teach abput the Bradfprd Hill criteria.

 

Does anyone have any referenced source of such data?

 

Alison

 

Alison Macfarlane
Department of Midwifery
City University London
Philpot Street, London E1 2EA
Phone (0) (44) 207 040 5832
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