SUBJECT:  Enhancements to numbers of missing and present values
AUTHORS:  Nicholas J. Cox
          University of Durham, UK
          Imperial College School of Medicine, London, UK
SUPPORT:  n.j.cox@durham.ac.uk

INSTALLATION:
Use standard in1 installation instructions.

HELP:
From inside Stata, on-line help is available.  Type


   . help nmissing
   . hlep npresent