The authors would like to thank the following people for their help and suggestions:

 Paul H.C. Eilers
 Catalina Torres
 Tim Riffe

The peer-review of the package (v1.0.3) was done by:
  @rlbarter
  @karthik
  @arfon
Thank you for suggestions and corrections.

The authors are also grateful to the following institutions for their support:

 University of Southern Denmark
 Max-Planck Institute for Demographic Research
 SCOR Corporate Foundation for Science
 
 
