Acknowledgements References
Notes
Note 1.: The following table contains the binary variable sets for the covariates "current month" (v1-v12) and "time lived since last birthday"(p1, p2) for people born in weeks 1-4. It can be seen that for a specific month of birth p1 and p2 are always linear combinations of v1 to v12. Current month and time lived since last birthday are defined for each year of a person’s live after 1 April 1968. This results in the variables p1 and p2 being highly correlated with the variables v1 to v12. Ultimately this may be the reason why a model that includes all fourteen variables simultaneously does not converge.

 

Current month

time lived since last birthday

v1 v2 v3 v4 v5 v6 v7 v8 v9 v10 v11 v12 p1 p2
0 0 0 0 0 0 0 0 0 0 0 0 0 0
1 0 0 0 0 0 0 0 0 0 0 0 0 0
0 1 0 0 0 0 0 0 0 0 0 0 0 0
0 0 1 0 0 0 0 0 0 0 0 0 1 0
0 0 0 1 0 0 0 0 0 0 0 0 1 0
0 0 0 0 1 0 0 0 0 0 0 0 1 0
0 0 0 0 0 1 0 0 0 0 0 0 1 0
0 0 0 0 0 0 1 0 0 0 0 0 1 0
0 0 0 0 0 0 0 1 0 0 0 0 1 0
0 0 0 0 0 0 0 0 1 0 0 0 1 0
0 0 0 0 0 0 0 0 0 1 0 0 0 1
0 0 0 0 0 0 0 0 0 0 1 0 0 1
0 0 0 0 0 0 0 0 0 0 0 1 0 1
Acknowledgements References

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Longevity and Month of Birth:
Evidence from Austria and Denmark

Gabrielle Doblhammer
1999 - 2000 Max-Planck-Gesellschaft ISSN 1435-9871
http://www.demographic-research.org/Volumes/Vol1/3