We have developed a number of statistical software programs, which are free for you to download and use. Please recognize, however, that hundreds of hours have been put into the development of these programs.

All we ask is that you properly cite them in any report or publication for which you use their results. This is a very small price to ask for these complicated routines. Each of the programs gives the exact citations that we expect you to use in referencing them.

The programs which are available (in PKZIP format) are:

  1. HALLEY: A population analysis program which constructs a life expectancy table, a stable population model, a birth table, and a 10-year cohort-component population projection. It has been used by cities and other public agencies all over the world

  2. COHORT: A 20-year cohort-component population projection program

  3. CRIMESTAT: A Spatial Statistics Program for the Analysis of Crime Incident Locations. This program was developed for the National Institute of Justice and is being used by the Baltimore County Police Department and the Criminal Division of the U.S. Department of Justice.

    The POINTSTAT spatial statistics program is no longer being supported as it has been superceded by CrimeStat.