The Rivard Weights Calculation Program allows the user to convert a
matrix of mid-year weights at age for a number of years to Jan-1 or
other time of the year. The program uses
the same algorithm as presently employed in the NFT Toolbox Virtual
Population Analysis (VPA) program. This utility allows
users of other assessment methods within the NFT Toolbox to access the
Rivard methodology in a convenient manner.